//  Program to use setPriority( ) method.class A extends Thread{public void run(){ for( int i=1 ; i<=10 ; i++ ) {       System.out.println( " THREAD A = " + i ); } System.out.println( " END OF THREAD A." );}}class B extends Thread{public void run(){&nb  ......

//  Program to extend multiple classes from Thread class.class A extends Thread{public void run(){ for( int i=1 ; i<=10 ; i++) {  System.out.println( " Java" ); }}}class B extends Thread{public void run(){ for( int i=1 ; i<=10 ; i++) {  System.out.printl  ......

//  Program to create a Thread by Implementing//  from Runnable interfaceclass A implements Runnable{public void run(){ for( int i=1 ; i<=15 ; i++) {  System.out.println(Thread.currentThread().getName() ); }}}class Thread03{public static void main( String args[ ] ){&  ......

//  Program to create a Thread by Extending from Thread class.class A extends Thread{public A( String s ){ super(s);}public void run(){ for( int i=1 ; i<=15 ; i++) {  System.out.println( getName() ); }}}class Thread01{public static void main( String args[ ] ){ A  ......

// Program Main thread and currentThread( ) methodclass CurrentThread{public static void main( String args[ ] ){ Thread t = Thread.currentThread(); System.out.println( "Current Thread is = " + t ); t.setName( "My Thread" ); System.out.println( "After Changing Name is = " + t );}}

// Program to use getName( ) and getPriority( )public class  MainThread{   public static void main( String[ ] args )   {      System.out.println( " Thread Name = " + Thread.currentThread().getName() );      System.out.println( " Priority     ......

//  Program to create Applet with param tag.import java.awt.*;import java.applet.Applet;/*<applet  code="AppletTest3.class" width="300" height="60"><param name="msg" value="Let's learn Applet.">  </applet>*/public class AppletTest3 extends Applet {String msg = "  ......

// Program to create Applet with param tag.import java.awt.*;import java.applet.Applet;/*<applet code="AppletTest2b.class" width="300" height="100"><param name="message" value="BIIT Computer Education" /></applet>*/public class  AppletTest2b  extends  Applet {St  ......

// Program to use getParameter() method to access width // and height of applet.import java.awt.*;import java.applet.Applet;/*<applet code="AppletTest2a.class" width="300" height="100"></applet>*/public class AppletTest2a  extends  Applet {public void init() {&nb  ......

// Program to use Applet with Button and it's event.import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.applet.Applet;import java.awt.Button;/*<applet code="AppletTest2.class" width="300" height="100"></applet>*/public class AppletTest2 extends Applet   ......

// Program to use getCodeBase() and getDocumentBase().import java.awt.*;import java.applet.*;import java.net.*;/*<applet code="Applet07" width="300" height="50"></applet>*/public class  Applet07  extends Applet{public void paint(Graphics g) { String msg;  UR  ......

//  Program with param tag in applet tag.import java.awt.*;import java.applet.*;/*<applet code="Applet06" width="300" height="50"><param name="message" value="Java makes the Web move!"></applet>*/public class  Applet06 extends Applet implements Runnable {String   ......

//  Program to display string in Status window.import java.awt.*;import java.applet.*;/*<applet code="Applet04" width="300" height="50"></applet>*/public class Applet04 extends  Applet{public void init() { setBackground(Color.yellow);}public void paint(Graphics g)&nbs  ......

// Program with Banner applet.import java.awt.*;import java.applet.*;/*<applet code="Applet03" width="300" height="50"></applet>*/public class  Applet03 extends Applet implements Runnable {String msg = "Java Programming Examples";Thread t = null;boolean flag;public void in  ......

// Program to use Applet with init(), start() and paint().import java.applet.Applet;import java.awt.*;/*<applet  code="AppletTest1.class" width="300" height="100"></applet>*/public class AppletTest1 extends  Applet {String msg = "";public void init() { setBackgro  ......

// Program to use Applet Program and it's Life Cycle.import java.awt.*;import java.applet.*;/*<applet code="Applet01" width="300" height="200"></applet>*/public class  Applet01  extends  Applet {public void init() { setBackground(Color.yellow); System.o  ......

// Program to use Wrapper class with switch statement.class  Wrapper6{public static void main(String args[ ]) { Integer iOb = 2;  switch(iOb)  {  case 1:    System.out.println("one");   break;  case 2:    System.out  ......

// Program to use Boolean Wrapper classclass  WrapperBoolean{public static void main( String args[ ] ){ Boolean b1 = new Boolean(false); Boolean b2 = new Boolean("true"); System.out.println(b1.booleanValue()); System.out.println(b2.booleanValue());}}Output:falsetrue

//  Program to use expression with Wrapper classes.class Wrapper5{public static void main(String args[ ]) { Integer iOb = 100; Double dOb = 123.45; dOb = dOb + iOb; System.out.println("dOb after expression: " + dOb);}}Output:dOb after expression: 223.45

// Program to explain Wrapper class Boolean and Character.class  Wrapper4{public static void main(String args[ ]) { Boolean bOb = true; if (bOb) {  System.out.println("bOb is true"); }  Character cOb = 'b';  char ch = cOb; System.out.printl

//  Program to explain Wrapper class with function.class  Wrapper3{static int func(Integer v) { return v ; }public static void main(String args[ ]) { Integer iOb = func(100); System.out.println(iOb);}}Output:100

// Program to explain Auto-Boxing and Auto-Unboxing.class Wrapper2{public static void main( String args[ ] ){ // Autoboxing Integer iOb = 100;   // Auto-unboxing int i = iOb;   System.out.println(i + " : " + iOb); }}Output:100 : 100

//  Program to use Simple Wrapper Class.class  Wrapper1{public static void main( String args[ ] ){ // Boxing Integer  iOb = new Integer(100); // Unboxing int i = iOb.intValue(); System.out.println(i + " : " + iOb); }}Output:100 : 100

//  Program to use enum in an application.import java.util.Random;enum  Answers {NO, YES, MAYBE, LATER, SOON, NEVER}class Question {Random rand = new Random();Answers ask() { int prob = (int) (100 * rand.nextDouble()); if (prob < 15)  return Answers.MAYBE;   ......

// Program to explain that enum has Ordinal// number that is used in comparison.enum  Colour {Red, Green, Blue, Black, White, Orange, Yellow}class  EnumDemo4 {public static void main(String args[ ]){ Colour c1, c2, c3; // Obtain all ordinal values using ordinal().   ......

//  Program to use Java Enum as a Class type.enum Colour {Red(200), Green(150), Blue(100), Black(250), White(175), Orange(225), Yellow(125);private int price;   // price of each colourColour(int p) {  price = p; }int getPrice() {  return price;   ......

//  Program to use values() and valueOf() methods of Enum.enum Colour {Red, Green, Blue, Black, White, Orange, Yellow}class EnumDemo2 {public static void main(String args[ ]){ Colour c1;  System.out.println("All Colour constants: "); Colour  clr[ ] = Colour.va  ......

//  Program to use Enumeration Named Constants.enum Colour {Red, Green, Blue, Black, White, Orange, Yellow}class EnumDemo1 {public static void main(String args[ ]){ Colour c1; c1 = Colour.Red; System.out.println("Value of c1: " + c1); c1 = Colour.Blue; if(c1 =  ......

//  Program to explain Chained Exception.class  ChainedException{static void demoproc() { NullPointerException e = new NullPointerException("top layer"); e.initCause(new ArithmeticException("cause")); throw e;}public static void main(String args[ ]) { try   ......

//  Program to create User-defined Exception//  for checking validity of number for Square root.class NegativeNumberException extends Exception {private double num;NegativeNumberException(double n) { num = n;}public String toString() { return "Square root of " + nu  ......

// Program to create User-defined Exception// for checking validity of age.class InvalidAgeException extends Exception {private int age;InvalidAgeException(int a) { age = a;}public String toString() { return "Age: " + age + " is not a valid age.";}}class  Exception14&nb  ......

// Program to use finally Block with exception handling.class  finallyBlockWithException{// Through an exception out of the method.static void procA() { try  {  System.out.println("inside procA");  throw new RuntimeException("demo"); }  finally   ......

//  Program to use throw statement to raise exception and rethrow the exception.class  ThrowExceptionExample {static void demoproc() { try  {  throw new NullPointerException("demo"); }  catch(NullPointerException e)  {  System.out  ......

// Program to explain Nested Try-Catch Block with Function.class  NestedTryCatchWithFunction{static void nesttry(int a) { try  {  if(a==1)    a = a / (a-a);  if(a==2)   {   int c[ ] = { 1 };   c[10] = 100;  } }  ......

//  Program to explain Nested Try-Catch Block.class NestedTryCatch{public static void main(String args[ ]) { try  {  int a = args.length;  int b = 10 / a;  System.out.println("a = " + a);  try   {    if(a==1)     a   ......

//Program to explain that, when we use multiple catch statements, it is //important to remember that exception subclasses must come before any of their superclasses.class  MultipleException{public static void main(String args[ ]) { try  {  int a = 0;  int b =   ......

// Program to catch Multiple exceptions in single Catch Block.class  Exception6{public static void main(String args[ ]) { try  {  int a = args.length;  System.out.println("a = " + a);  int b = 10 / a;  int c[] = { 1 };  c[10] = 100; }    ......

// Program to use Multiple Catch Block with Exception.class Exception05 {public static void main(String args[ ]) { try  {  int a = args.length;  System.out.println("a = " + a);  int b = 10 / a;  int c[ ] = { 1 };  c[10] = 100; }  catch  ......

//  Simple try and catch example for exception handlingclass  SimpleTryCatchExample {public static void main(String args[ ]) { int d, a; try  {   d = 0;  a = 10 / d;  System.out.println("This will not be printed."); }  catch   ......

// Program without Exception Handling and // stack trace of Default Handler of JVM.class  DefaultException2 {static void subroutine() { int d = 0; int a = 10 / d;}public static void main(String args[ ]) { Exception02.subroutine();}}Output:Exception in thread "  ......

// Simple  Program without Exception Handling and // use of Default Handler of JVM.class  DefaultException{public static void main(String args[ ]) { int  d = 0; int  a = 10 / d; // here JVM automatiically handle exaception}}Output:Exception in thread "mai

// program to explain static import for static Field.import java.util.Scanner;import static java.lang.Math.PI;class StaticImport2{public static void main( String args[ ] ){ double r, a; Scanner sc = new Scanner( System.in );  System.out.print("Enter Radius : "); r = sc.nextD  ......

//  program to explain static import statement.import static java.lang.Math.*;//   import static java.lang.Math.sqrt;class StaticImport{public static void main( String args[ ] ){ double a = 3.0, b = 4.0; double c = sqrt( a*a + b*b ); System.out.println(" C = " + c );}} 

//  import with * sign.import  java.util.*;class  ImportTest2{public static void main( String args[ ] ){ double r, a; Scanner sc = new Scanner( System.in );  System.out.print("Enter Radius : "); r = sc.nextDouble();  a = 3.14 * r * r;  Syst

//  Using class without import.class  ImportTest{public static void main( String args[ ] ){ double  r, a; java.util.Scanner sc = new java.util.Scanner( System.in );  System.out.print("Enter Radius : "); r = sc.nextDouble();  a = 3.14 * r * r; &n

//  Using class with import.import java.util.Scanner;class ImportTest2{public static void main( String args[ ] ){ double r, a; Scanner sc = new Scanner( System.in );  System.out.print("Enter Radius : "); r = sc.nextDouble();  a = 3.14 * r * r;  Syste

// Program to  Visibility Control in Another Package.// First File ( Base.java ) in package p1package  p1;public class  Base {private int n_pri = 1;int n_def = 2;protected int n_pro = 3;public int n_pub = 4;public Base() { System.out.println("base constructor"); Sy  ......

// Program to Visibility Control in Same Package.// First File ( Base.java ) in package p1package p1;public class Base {private int n_pri = 1;int n_def = 2;protected int n_pro = 3;public int n_pub = 4;public Base() { System.out.println("base constructor"); System.out.println("n_p  ......

//  Program to explain Importing Packagepackage MyPack;public class  Balance {String name;double bal;public Balance(String n, double b) { name = n; bal = b;}public void show() { if(bal<0)  System.out.print("--> "); System.out.println(name + ":   ......

//  Program to explain Creating Package.package MyPack;class  Balance {String name;double bal;Balance(String n, double b) { name = n; bal = b;}void show() { if(bal<0)  System.out.print("--> "); System.out.println(name + ": Rs. " + bal);}}class   ......

// Program to explain Importing Package.package  Pack1;public class  First{public void view( ){ System.out.println( "This is First Class." );}}// Second File as (ImportPack1.java in current folder) :import Pack1.*;public class  ImportPack1{public static void main( String args[ ] 

// Program to explain Creating Package.package  Pack1;class First{public void view( ){ System.out.println( "This is First Class." );}}public class  ImportPack2{public static void main( String args[ ] ){ First f = new First(); f.view();}} Output:This is First Class.

// Program to Implement a class from multiple interfaces.interface  A{void showA();}interface  B {void showB();}class  C  implements  A, B{public void showA(){ System.out.println("showA() of A interface.");}public void showB(){ System.out.println("showB() of B  ......

//  Polymorphism  with interface exampleinterface Shape{void draw();}class Rectangle implements Shape{public void draw(){ System.out.println("Drawing Rectangle.");}}class Triangle implements Shape{public void draw(){ System.out.println("Drawing Triangle.");}}class  Polymorph  ......

//  Program to explain Inheritance of a interface// from multiple interfaces.interface A{void showA();}interface B {void showB();}interface C extends  A, B{void showC();}class  D  implements  C{public void showA(){ System.out.println("showA() of A interface.");}pub  ......

//  Program to explain Inheritance of a interface//  from another interface.interface AInterface{void showA();}interface BInterface extends AInterface {void showB();}class Test  implements BInterface{public void showA(){ System.out.println("showA() of A interface.");}public   ......

//  Program to explain partial implementation of an interface.interface AInterface{void showA();void showB();}abstract  class  B  implements  AInterface {public void showA(){ System.out.println("showA() of A interface.");}}class Test extends B{public void showB(){&  ......

//  Program to use field in interface.interface AInterface{int  SIZE = 100;void  showA();}class Test  implements  AInterface{public void showA(){ System.out.println("showA() of A interface."); System.out.println("SIZE = " + SIZE);}}class  InterfaceTest2{public  ......

//  Program to use Simple Interface.interface  AInterface{void showA();}class Test  implements  AInterface{public void showA(){ System.out.println("showA() of A interface.");}}class  InterfaceTest1{public static void main( String args[ ] ){ Test  t1 = new Test  ......

//  Program to explain final method restricts //  (not allow) the overriding of that methodclass  A{final void display(){ System.out.println(" A\'s display().");}}class  B extends A{// final method can't be override.// void display()void show(){ System.out.println(  ......

// Program to explain final class restricts (not allow) // the inheritance from that class.final class A{void display(){ System.out.println(" A\'s display().");}}// final class can't be inherited.// class B extends A // Errorclass B{void display(){ System.out.println(" B\'s display().  ......

// Program to explain Calling super class parameterize constructor using super.class  A {int x;A(int a) { x = a; System.out.println("A constructor, x : " + x);}}class  B extends A {int y;B(int a, int b) { super(a); y = b; System.out.println("B c  ......

//  Program to explain Calling super class constructor using superclass  A {A() { System.out.println("A constructor.");}}class B extends A {B() { super(); System.out.println("B constructor.");}}class C extends B {C() { super(); System.  ......

//  Program to explain Order of Constructor calling in Inheritanceclass   A {A() { System.out.println("Inside A's constructor.");}}class  B  extends  A {B() { System.out.println("Inside B's constructor.");}}class  C  extends  B&nb  ......

//  Program to explain Polymorphism with abstract class.abstract class Shape{abstract void draw();}class Rectangle extends Shape{void draw(){ System.out.println("Drawing Rectangle.");}}class Triangle extends Shape{void draw(){ System.out.println("Drawing Triangle.");}}class  Poly  ......

//  Program to explain Polymorphism or //  Dynamic Method Dispatch or Run Time Binding.class  Shape{void draw(){ System.out.println("Drawing Shape.");}}class  Rectangle extends Shape{void draw(){ System.out.println("Drawing Rectangle.");}}class  Triangle exten  ......

//  Using super to call Overriding Method.class  A {int  i, j;A(int a, int b) { i = a; j = b;}void show() { System.out.println("i and j: " + i + " " + j);}}class B extends A {int k;B(int a, int b, int c) { super(a, b); k = c;}void show  ......

// Program to explain Method Overriding.class  A {int  i,  j;A(int a, int b) { i = a; j = b;}void show() { System.out.println("i and j: " + i + " " + j);}}class  B extends A {int  k;B(int a, int b, int c) { super(a, b); k = c  ......

// Program to explain Method Overloading.class  A {int i, j;A(int a, int b) { i = a; j = b;}void show() { System.out.println("i and j: " + i + " " + j);}}class  B extends A {int k;B(int a, int b, int c) { super(a, b); k = c;}void show(Strin  ......

//Program to use super to access super class instance variables //when sub class instance variables hides the super class instance variables.class A {int x;}class B extends A {int  x;   // this x hides the x in AB(int a, int b) { super.x = a;   // x in A   ......

//  hierarchical inheritance exampleclass student1{   private String name;   private int rno;      void setname(String name, int rno)   {       this.name = name;       this.rno = rno;   }  &  ......

// Program to use super keyword to call Super class constructor to // initialize super class instance variablesclass Box {private double width;private double height;private double depth;Box(Box ob) {  width = ob.width; height = ob.height; depth = ob.depth;}Box(doub  ......

//  Program to use this keywordclass n {   public int i;   int getI() {       return i;   }}class M extends n {   int a, b;   void sum(int a, int b) {       int d = getI();       this.a  ......

//  Program to explain Multilevel Inheritance.class Box {private double width;private double height;private double depth;Box(Box ob) {  width = ob.width; height = ob.height; depth = ob.depth;}Box(double w, double h, double d) { width = w; height = h;  ......

// Simple Inheritance example 2class  A {int i, j;void showij() { System.out.println("i and j: " + i + " " + j);}}class B extends A {int k;void showk() { System.out.println("k: " + k);}void sum() { System.out.println("i+j+k: " + (i+j+k));}}class  Inh  ......

// Simple Inheritance examplepublic class SimpleInheritance{   public static void main(String[] args) {       SubClass ob1 = new SubClass();       ob1.showmsgSuper();       ob1.showmsgSub();   }}class SuperClass{  &  ......

// Program to explain the concept of "ARRAY OF STRING".class  StrArray{public static void main( String args[ ] ){ final int days = 7; String str[ ] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"   };   for( int  j=0 ; j<day  ......

// Program to explain the following StringBuffer function :// StringBuffer reverse()class  Mreverse{public static void main( String args[ ] ){ StringBuffer sb = new StringBuffer( "Java Programming Examples." ); System.out.println( " String = " + sb );  sb.reverse(); Sys  ......

// Program to explain the following StringBuffer function :// StringBuffer replace( int startIndex, int endIndex, String str )class  Mreplace1{public static void main( String args[ ] ){ StringBuffer sb = new StringBuffer( "Java Programming Examples." ); System.out.println( " String =   ......

// Program to explain the following StringBuffer function :// StringBuffer insert( int index, Object ob )class  Minsert1{public static void main(String args[ ]){ StringBuffer sb = new StringBuffer(40); sb = sb.insert(0, 'A'); System.out.println(" String 1 = " + sb);  sb  ......

// Program to explain the following StringBuffer function :// StringBuffer insert( int index, String str )class  Minsert{public static void main( String args[ ] ){ String s = new String( "Java" ); StringBuffer sb = new StringBuffer( " Examples." ); sb = sb.insert( 0, s ); Sy  ......

// Program to explain the following StringBuffer function :// StringBuffer deleteCharAt( int loc )class  MdeleteCharAt{public static void main( String args[ ] ){ StringBuffer sb = new StringBuffer( "Java Programming Examples." ); System.out.println( " String = " + sb );  sb   ......

// Program to explain the following StringBuffer function ://StringBuffer delete( int startIndex, int endIndex )class  Mdelete{public static void main( String args[ ] ){ StringBuffer sb = new StringBuffer( "Java Programming Examples." ); System.out.println( " String = " + sb ); &  ......

// Program to explain the following StringBuffer function ://String toString()class  MtoString{public static void main( String args[ ] ){ StringBuffer sb = new StringBuffer( "Java Programming Examples." );  String s = sb.toString(); System.out.println( " String = " + s );&nb

// Program to explain the following StringBuffer function ://String substring( int startIndex )//String substring( int startIndex, int endIndex )class  Msubstring1{public static void main( String args[ ] ){ StringBuffer sb1 = new StringBuffer( "Java Programming Examples." );  Sys  ......

// Program to explain the following StringBuffer function :// void setLength( int len )class  MsetLength{public static void main(String args[ ]){ StringBuffer sb1 = new StringBuffer("Java Programming Examples."); System.out.println(" String = " + sb1); sb1.setLength(12); Sys  ......

// Program to explain the following StringBuffer function :// void setCharAt( int where, char ch )class  MsetCharAt1{public static void main( String args[ ] ){ StringBuffer sb1 = new StringBuffer( "Java Nrogramming Examples." ); System.out.println( " String Before Replacing = " + sb1   ......

// Program to explain the following StringBuffer function :// int capacity()class  Mcapacity{public static void main( String args[ ] ){ StringBuffer sb1 = new StringBuffer(); StringBuffer sb2 = new StringBuffer( "Java Programming Examples" ); System.out.println( " Capacity = " +   ......

// Program to explain the following StringBuffer function :// StringBuffer append( char c )class  Mappend1{public static void main( String args[ ] ){ StringBuffer sb = new StringBuffer( 40 ); sb = sb.append( 'J' ); System.out.println( " String 1 = " + sb );  sb.append(   ......

// Program to explain the following StringBuffer function :// StringBuffer()// StringBuffer( int size )// StringBuffer( String str )class  MStringBuffer1{public static void main(String args[ ]){ StringBuffer sb = new StringBuffer("Java");  System.out.println(" sb = " + sb );   ......

// Program to explain the following String function :// int lastIndexOf( String str )class  MlastIndexOf{public static void main( String args[ ] ){ String s1 = "Java Programming Examples Java Programming Examples.";    System.out.println( " Last Index of " + 'P' + " = " + s1  ......

// Program to explain the following String function :// int indexOf(int ch) // int indexOf( String str )class  MindexOf{public static void main(String args[ ]){ String s1 = "Java Programming Examples Java Programming Examples.";    System.out.println(" Index of " + 'P'   ......

// Program to explain the following String function :// String substring( int startIndex )// String substring( int startIndex, int endIndex )class  Msubstring{public static void main( String args[ ] ){ String s1 = "Java Programming Examples.";   String s2 = s1.substring( 5 )  ......

//  Program to explain the following String function ://  static String valueOf( double num )class  MvalueOf {public static void main( String args[ ] ){ char  ch[ ] = { 'J', 'A', 'V', 'A' }; String s1 = String.valueOf( ch ); System.out.println( " String 1 : "   ......

// Program to explain the following String function :// String  trim()class  Mtrim{public static void main( String args[ ] ){ String s = "            Java Programming Examples.           ".trim(); System.out.print( "String af

// Program to explain the following String function :// String toUpperCase()class  MtoUpperCase{public static void main( String args[ ] ){ String s1 = "Java Programming Examples"; String s2 = s1.toUpperCase(); System.out.println( " Original  String : " + s1 ); System.ou  ......

// Program to explain the following String function : // String toLowerCase()class  MtoLowerCase{public static void main( String args[ ] ){ String s1 = "Java Programming Examples."; String s2 = s1.toLowerCase(); System.out.println( " Original  String : " + s1 ); Sy  ......

// Program to explain the following String function :// String[ ] split( Stirng regExp )class  Msplit{public static void main( String args[ ] ){ String s1 = new String( "Java Programming Examples" ); String s2[ ] = s1.split( " " ); System.out.println( " String = " + s2[0] );   ......

// Program to explain the following String function :// boolean regionMatches( int startIndex,// String str2, int str2StartIndex, int numChars )class  MregionMatches1 {public static void main(String args[ ]){ boolean b,b1; String s1 = new String("Java Programming Examples.");&nbs  ......

// Program to explain the following String function :// void getChars( int sourceStart, int sourceEnd,// char target[], int targetStart )class  MgetChars{public static void main( String args[ ] ){ char  ch[ ] = new char[4]; String s1 = "Java Programming Examples.";  &nb  ......

// Program to explain the following String function :// int compareTo( String str )class  McompareTo{public static void main( String args[ ] ){ String s1 = "JAVA"; String s2 = "JAVA"; String s3 = "Java";    System.out.println( s1 + " compared to " + s2 + " = " + s1  ......

// Program to explain the following String function :// equals versus ==class  MequalsVersusEqualto{public static void main( String args[ ] ){ boolean b; String s1 = "JAVA"; String s2 = "JAVA"; String s3 = "Java"; String s4 = new String( "JAVA" ); String s5 = new S  ......

// Program to explain the following String function :// boolean equalsIgnoreCase( Object str )class  MequalsIgnoreCase{public static void main( String args[ ] ){ String s1 = "JAVA";  String s2 = "JAVA"; String s3 = "Java"; System.out.println( s1 + " equals " + s2 + " =   ......

// Program to explain the following String function :// int length()class  Mlength{public static void main( String args[ ] ){ char ch[ ] = { 'J', 'A', 'V', 'A' }; String s1 = new String( ch ); System.out.println( " String = " + s1 ); System.out.println( " Length = " + s1.len  ......

// Program to explain the following String function :// char charAt( int where )class  McharAt{public static void main( String args[ ] ){ char ch; String s1 = "Nils";   ch = s1.charAt( 0 ); System.out.println( " Character at 0 : " + ch ); ch = "Java".charAt( 3  ......

// Program to explain the following String function :// String( byte asciiChars[ ] )class  MString4{public static void main( String args[ ] ){ char ch[ ] = { 'J', 'A', 'V', 'A' }; String s1 = new String( ch ); byte b[ ] = { 65, 66, 67, 68, 69, 70 }; String s2 = new String( b  ......

// Program to explain the following String function :// String(char chars[ ], int startIndex, int numChars)class  MString2{public static void main( String args[ ] ){ char ch[ ] = { 'J', 'A', 'V', 'A' }; String s = new String( ch, 2, 2 ); System.out.println( " String = " + s );&nb  ......

// Program to explain the following String function :// String( String strObj )class  MString11{public static void main( String args[ ] ){ String s1 = "Nils : " + 5 + 5;  String s2 = "Nils : " + (5 + 5); System.out.println( s1 ); System.out.println( s2 );}}Output:Nils :

// Program to initialize 2D array with expressionclass  InitTwoDWithExp {public static void main(String args[ ]) { double a[ ][ ] = {   { 0*0, 1*0, 2*0, 3*0 },   { 0*1, 1*1, 2*1, 3*1 },   { 0*2, 1*2, 2*2, 3*2 },   { 0*3, 1*3, 2*3, 3*3 } };&  ......

//  Program to explain Jagged Arrayclass  JaggedArray2 {public static void main(String args[ ]) { int ar[ ][ ] = new int[4][ ]; ar[0] = new int[1]; ar[1] = new int[2]; ar[2] = new int[3]; ar[3] = new int[4]; int  i, j, x = 1; for( i=0 ; i &  ......

// Program to addition of two Matrixclass  MatrixAddition{public static void main( String args[ ] ){ int  i, j; int  c[ ][ ] = new int[3][3];  int  a[ ][ ] = {      {1, 2, 3},     {4, 5, 6},     {7, 8, 9}  };&n  ......

//  Program to find transpose of the Matrix without //  using second Matrixclass  MatrixTransSame{public static void main( String args[ ] ){ int  i, j; int  temp;   int  a[ ][ ] =  {   { 1, 2, 3 },     { 4, 5, 6 },   ......

//Program to find transpose of the Matrixclass  MatrixTranspose{public static void main( String args[ ] ){ int i, j; int  b[ ][ ] = new int[3][3];  int   a[ ][ ] = {      {1, 2, 3},    {4, 5, 6},      {7, 8, 9}  };   ......

// print simple matrix of arraypublic class PrintingInMatrixFormat{   public static void main(String[] args)   {       int i,j;       int a[][]=new int[3][3];       a[0][0]=10;       a[0][1]=20;   ......

// Read 2D array from keyboardimport java.util.*;class Simple2DArray {public static void main(String args[ ]) { int  a[ ][ ]= new int[2][3]; int  i, j; Scanner sc = new Scanner( System.in );  for( i=0 ; i<2 ; i++ ) {  for( j=0 ; j<3 ; j++   ......

// Program to use Two dimensional Arrayclass TwoDArray {public static void main(String args[ ]) { int a[ ][ ]= new int[2][3]; int i, j, x = 1; for(i=0; i<2; i++) {  for(j=0; j<3; j++)   {   a[ i ][ j ] = x;   x++;  } }&  ......

// Sum Of Array Elementspublic class SumOfArrayElements{   public static void main(String[] args) {       int i, j, sum = 0;       int a[][] = {{10, 20, 30}, {40, 50, 60}, {70, 80, 90}};       for (i = 0; i < 3; i++) {  &n  ......

// Program to Implement Merge Sortimport java.util.Scanner;public class MergeSort {   /* Merge Sort function */   public static void sort(int[] a, int low, int high)    {       int N = high - low;           &nb  ......

// Java Program to Implement Quick Sortimport java.util.Scanner; public class QuickSort {   /** Quick Sort function **/   public static void sort(int[] arr)   {       quickSort(arr, 0, arr.length - 1);   }   /** Quick so  ......

// Program to SORT the Array elements using SELECTION SORTclass  SelectionSort{public static void main( String args[ ] ){ int  i, j; int  a[ ] = { 40, 20, 50, 10, 30 };  System.out.print( "\n Unorted Numbers are = " ); for( i=0 ; i<5 ; i++ ) {  Sy  ......

//  Program to SORT the Array elements using INSERTION SORTclass  InsertionSort{public static void main( String args[ ] ){ int  a[ ] = { 0, 20, 40, 10, 50, 30 }; int i, n = 5; System.out.print( " The Unsorted Array is = " ); for( i=1 ; i<=n ; i++ ) {    ......

// Program to SORT the Array elements using BUBBLE SORTclass  BubbleSort{public static void main( String args[ ] ){ int i, j, t; int  a[ ] = { 40, 20, 50, 10, 30 };  System.out.print( "\n Unorted Numbers  are = " ); for( i=0 ; i<5 ; i++ ) {  Syste  ......

//  Program to Print the Fibonacci Series using Array.class  FiboArray{public static void main( String args[ ] ){ int n, i; int  a[ ] = new int[20];   n = 10; a[0] = 0;   a[1] = 1;   for(i=2 ; i<n ; i++)    {  a[  ......

// Arrange Array in Ascending orderpublic class ArrayAscending {   public static void main(String[] args) {       int i, temp, j;       int a[] = {1, 7, 5, 9, 2, 12, 53, 25};System.out.println("Before Ascending order:");for (i = 0; i < 8; i++) {&n  ......

// Minimum element from arraypublic class MinimumOfArray{   public static void main(String[] args)   {       int i,min;       int a[]={10,60,5,40,50};       min=a[0];       for(i=0;i<5;i++)  &  ......

//  Maximum element from Array public class MaximumOfArray{   public static void main(String[] args)   {       int i,max=0;       int a[]={10,60,30,40,50};       for(i=0;i<5;i++)       {&  ......

//  Read array from keyboardimport java.util.*;class  ArrayTest{public static void main( String args[ ] ){ Scanner sc = new Scanner( System.in ); int  i; int  a[ ] = new int[5];  for( i=0 ; i<5 ; i++ ) {  System.out.print( "Enter Value : " );  ......

// average of sum of arraypublic class SumAndAverage{   public static void main(String[] args)   {       int i,sum=0,avg=0;       int a[]={10,20,30};       for(i=0;i<a.length;i++)       {  &nb  ......

//  sum elements of arraypublic class SumOfElementsOfArray{   public static void main(String[] args)   {       int a[]=new int[5];       int i,sum=0;       a[0]=1;       a[1]=2;    &nbs  ......

// Simple static arraypublic class SimpleArray{   public static void main(String[] args)    {       int a[]={10,20,30,40,50};       for(int i=0;i<5;i++)       {           System.out.

Hello Developers, If you stuck to find how to add jar files in library of your project in IntelliJ Idea follow below steps:Open your IntelliJ idea and open the project on which you are working.You will see a setting icon on top right corner of your screen. Click on that and select project struc  ......

// Do while exampleclass  DoWhileTest{public static void main( String args[ ] ){ int   i = 1; // 1.  Initialization do {  System.out.print( "  " + i );  i++; // 3.  Increment. }while ( i <= 5 ); // 2.  Test / Condition}}Output: 1 &n

An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. For example, 371 is an Armstrong number since 3**3 + 7**3 + 1**3 = 371.Code// Program to check whether a given Number is// ArmStrong Number or not.class  ArmstrongTest{p  ......

What is strong number?Strong number is a special number whose sum of the factorial of digits is equal to the original number. For Example: 145 is strong number. Since, 1! + 4! + 5!Code//Program to Check the given Number is STRONG Number or not.// Logic 145 = 1! + 4! + 5!  (i.e.,  145 = 1 +  ......

// check given number is palindrom or notpublic class PalindromeNumber {   public static void main(String[] args) {       int n = 1215;       int sum = 0;       int m = n;       while (n > 0) {      ......

// Maximum digit from numberpublic class MaximumDigit {   public static void main(String[] args) {       int i = 235;       int temp = 0;       while (i > 0) {           int r = i % 10;     ......

// Sum of digits of given numberpublic class SumOfDigits {       public static void main(String[] args)     {       int i=521;              int sum=0;       while(i>0)  &nb  ......

// count number of given digitsclass  NumberOfDigits{public static void main( String args[ ] ){ int n, c;  n = 1234; c = 0; while( n != 0 ) {  n = n / 10;  c++; } System.out.println( " Number of Digits : " + c );}}Output:Number of Digits : 4

// Nested while loop examplepublic class NestedWhile{   public static void main(String[] args) {       int a = 1, b;       while (a <= 5) {           b = 1;           while (b <= a) {&  ......

// simple while loop examplepublic class WhileLoop{   public static void main(String[] args) {       //learning       int a = 1;       while (a <= 5) {           System.out.println(" "+a);  &n  ......

// for each loop exampleclass  ForEachTest {public static void main( String args[ ] ){  int  ar[ ] = { 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 };   for(int  x : ar)    { System.out.print(x + " ");  x = x * 10;  // no effect on num  ......

// foreach examplepublic class ForEachLoop {   public static void main(String[] args) {       int arrayname[] = {1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21};//learn       for (int val : arrayname) {           System.out.print  ......

public class AdvancedForLoop {   public static void main(String[] args) {             String s1 = "INDIA";       char s2[] = new char[s1.length()];       for (int i = 0; i < s1.length(); i++) {      ......

 // Program to find HCF and LCM of Two given Number.import java.util.Scanner;class  HcfAndLcmExample{public static void main( String args[ ] ){ int a, b, i, s, hcf=0, lcm=0; Scanner sc = new Scanner( System.in );  System.out.print( " Enter First Number : " ); a = s  ......

// Program to Check the Given Number is PRIME or NOT.class  PrimeTest{public static void main( String args[ ] ){ int i, n; boolean  flag = true;  n = 29;   for( i=2 ; i<=n/2 ; i++ ) {  if( n % i == 0 )  {   flag = false;     ......

Before proceeding to our program code, we must see what is perfect number.What is perfect number?In number theory, a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For instance, 6 has divisors 1, 2 and 3 (excluding itself), and 1   ......

// Program to Print the Lucas Series.//  1  1  1  3  5  9.....n  Terms.class  LucasTest {public static void main( String args[ ] ){ int n, i , a = 1, b = 1, c = 1, d;   n = 10; System.out.print( " " + a + " " + b + " " + c);    ......

//  Program to Calculate the Fibonacci Series of the Given Number.class  FibonacciTest {public static void main( String args[ ] ){ int n, i , a = 0, b = 1, c = 0;   n = 6; System.out.print( " " + a + " " + b );    for( i=1 ; i<=(n-2) ; i++ )&  ......

//Program to Calculate the Factorial of the Given Number.class  FactorialTest{public static void main( String args[ ] ){ int i, n;  n = 5; int f = 1; for( i=n ; i>=1 ; i-- ) {  f = f * i ; } System.out.println( "\n The Factorial of " + n + " is = 

// continue staement examplepublic class ContinueStatement{   public static void main(String[] args) {       for (int i = 0; i < 10; i++) {                       if (i % 2 == 0) {          ......

//  Label block and breakpublic class BreakAsGoto{   public static void main(String[] args) {       aBlock:       {           bBlock:           {             ......

// Break startment in for loop examplepublic class BreakStatement{   public static void main(String[] args) {       for (int i = 0; i < 10; i++) {           System.out.println(i);           if(i==5){  &  ......

//pattern using for and whilepublic class ForPattern{   public static void main(String[] args) {       int i, j;       for (i = 1; i <= 5; i++) {           for (j = 1; j <= 5; j++) {        &nbs  ......

// for loop and while looppublic class ForWhile {   public static void main(String[] args) {       for (int i = 1; i <= 5; i++) {           int j = i;           while (j <= 5) {         ......

// For loop patternpublic class NestedFor {   public static void main(String[] args) {       for (int i = 0; i < 5; i++) {           for (int j = 0; j <= i; j++) {               System.out.print  ......

This program will print sum of Even numbers and odd numbers separately.// sum of even odd using while loopclass OddEvenSum {   public static void main(String[] args) {       int i;       int sum = 0;       int sum1 = 0;  &nbs  ......

This program will print the sum of n numbers. // sum of numbers using command lineclass  ArguSum{   public static void main( String args[ ] )   { int  s = 0, len; len = args.length;  for( int i=0 ; i<len ; i++ ) {  int  x = Int  ......

Here we have made a simple for loop example in Java.// Simple for loop examplepublic class ForLoop{   public static void main(String[] args) {       for (int i = 0; i < 5; i++) {           System.out.println("Loop : "+i);    &n

//  Program to use String literal in case of switch-case statementimport java.util.*;class  SwitchString{public static void main(String args[ ]){ String dname; Scanner sc = new Scanner( System.in );  System.out.print( " Enter Day Name = " ); dname = sc.next();   ......

// Switch case examplepublic class SwitchCase{   public static void main(String[] args) {       int choice = 1;       switch (choice) {           case 0:               System.out.p  ......

// Even odd using switch caseclass  EvenOdd{public static void main(String args[ ]){ for( int i=1 ; i<=10 ; i++ ) {  switch( i )  {   case 1:   case 3:   case 5:   case 7:   case 9:    System.out.println( i + " -  ......

// Find day using switch caseclass  SwitchCaseDays {public static void main(String args[ ]){ int day; day = 6; switch( day ) {  case 1:   System.out.println( " Monday." );   break;  case 2:   System.out.println( " Tuesday." );&nbs  ......

// Simple switch case exampleclass SwitchDemo {public static void main( String args[ ] ){ int  a = 2;  switch (a)  {  case 1 :   System.out.println("One.");   break;  case 2 :   System.out.println("Two.");   break;&  ......

/*  Program to calculate commission of a salesman according to the given rate using else if ladder statement.   Sales Value         Comm. Rate (%)   0 to 5000           0 %   5000 to 10000       5 %    ......

// Program to show Day Name according to Day Number ( 1 - 7 ) using else-if ladder statement.class  ElseIfDays{public static void main(String args[ ]){ int day; day = 7; if( day == 1 )  System.out.println( " Monday." ); else if( day == 2 )  System.out.println( " Tu  ......

// else if ladder examplepublic class ElseIfLadder{   public static void main(String[] args) {       int a = 13;       if (a < 0) {           System.out.println("a is negative");       } else if (a  ......

// Program to find given year is leap year or notclass  Leap2{public static void main( String args[ ] ){ int y; y = 2016; if( y % 100 == 0 ) {  if( y % 400 == 0 )   System.out.println( " It is a LEAP Year." );  else   System.out.println( " It is  ......

/*  Program to calculate commission of a salesman according to the given rate using Nested-if statement.   Sales Value         Comm. Rate (%)   0 to 5000           0 %   5000 to 10000       5 %     ......

// Program to find Maximum of Three numbers using Nested-If.class Max3IfElse{public static void main( String args[] ){ int a, b, c, max; a = 23; b = 93; c = 10; if( a > b ) {  if( a > c )   max = a;  else   max = c;       ......

//  Nested if examplepublic class NestedIf{  public static void main(String[] args) {  int a = 10;    if(a>0){      if(a<=10){          System.out.println("a --> 0 to 10");      }      &  ......

//  Program to find Maximum of Two numbers using If-Else.class Max2IfElse{public static void main( String args[] ){ int a, b, max; a = 23; b = 14; if( a > b )  max = a; else  max = b;     System.out.println("\nMaximum : " + max );}}Outpu

// Simple if else to find even odd numberclass EvenOddTest{public static void main( String args[] ){ int n; n = 23; if( n % 2 == 0 )  System.out.println("Number " + n + " is Even Number." ); else  System.out.println("Number " + n + " is Odd Number." );}}Output:Number 23

// Simple if else examplepublic class IfElse{   public static void main(String[] args)    {      int a = 23, b = 47, c;        if(a>b)      {          System.out.println("a is greater than b")  ......

//  Simple if else exampleclass IfElse{public static void main( String args[ ] ){ int  n;  n = 23; if( n > 100 ) {  System.out.println( " The number is greater than 100." ); }  else {  System.out.println( " The number is smaller tha

// Simple if examplepublic class SimpleIf{   public static void main(String[] args) {       int a = 10;       int b = 20;              if(a>b){           System.out.println("a i  ......

// Simple if exampleclass  SimpleIf{public static void main(String args[ ] ){ int  n;  n = 230; if( n > 100 ) {  System.out.println( " The number is greater than 100." ); }}}Output:The number is greater than 100.

// Program to explain Implicit Conversion ( Automatic Type Conversion )class ImplicitConversion{public static void main( String args[ ] ){ Int  i = 2; float  f = 12.33f; byte  b = 1;  double d = 124.097; double  res = ( i - b ) * ( d / f );  &nb

//  Program to explain Type Casting ( Explicit Conversion )class TypeCasting{public static void main( String args[ ] ){ int a; float b = 123.333f; System.out.println( " Before Casting = " + b ); a = (int) b;  System.out.println( " After Casting  = " + a );}}Ou

//  Program to use Short-Hand Assignment Operators ( +=, -=, *=, /=, %= )class ShortHandAssign {public static void main(String args[ ]) { int a = 1; int b = 2; int c = 3; a += 5; b *= 4; c += a * b; c %= 6; System.out.println("a = " + a); S

// Program to use Bitwise Short-hand assignment operatorclass BitwiseShortHandAssignmentOperator{public static void main( String args[ ] ){ int a = 13; System.out.println("a : " + a);  a &= 4; System.out.println("a &= 4 : " + a);  a |= 3; System.out.pr  ......

//  Program to explain Logical Or ( | ) and Logical Short-circuit Or ( || ) Operator.class  ShortCircuitOr{public static void main(String args[ ]) { int a = 10, b = 20;  if( (a > 5) || (++b < 10) ) {  System.out.println(" True "); } System.out.  ......

// Program to explain Logical And ( & ) and Logical Short-circuit And ( && ) Operatorclass ShortCircuitAnd{public static void main(String args[ ]) { int a = 10, b = 20;  if( (a < 5) && (++b < 10) ) {  System.out.println(" True "); } S  ......

// Program to find the Largest of three given numbers using Conditional Operatorclass MaxOf3ConditionalOperator{public static void main( String args[ ] ){ int a, b, c, max = 0; a = 20; b = 30; c = 45;    max = ((a>b) ? ((a>c) ? a : c ) : ((b>c) ? b : c )); 

//Program to explain the concept of Conditional Operator in different styleclass ConditionalOperator{public static void main( String args[ ] ){       int a, b, max; a = 25; b = 14; max = ( ( a > b ) ? a : b ); System.out.print("\nMaximum Value is= " + max )

//  Program to use Boolean Logical Operators ( &, |, ^, !  )class  BoolLogic {public static void main(String args[ ]) { boolean a = true; boolean b = false;  boolean c = a | b; boolean d = a & b; boolean e = a ^ b; boolean f = !a;&n  ......

// Program to use Modulus  operator ( % )class Modulus {public static void main(String args[ ]) { int x = 42; double y = 42.25; System.out.println("x mod 10 = " + x % 10); System.out.println("y mod 10 = " + y % 10);}}Output:x mod 10 = 2 y mod 10 = 2.25

// Decrement Operator Exampleclass DecrementOperatorExample{public static void main( String args[ ] ){ int a = 10, b = 20 ,c;  c = ( --a ) + ( --b ); //c = ( a-- ) + ( b-- );  System.out.println( " Value of a = " + a ); System.out.println( " Value of b = " + b );&n

// Increment Operator exampleclass  IncrementOperatoeExample{public static void main( String args[ ] ){ int a = 10, b = 20 ,c;  c = ( ++a ) + ( ++b );  // a++ is Post fix increment // ++b is pre fix increment  System.out.println( " Value of a = " + a );&n  ......

//Program to use Logical Bitwise Operatorsclass BitwiseOperatorExample{public static void main(String args[ ]) { int a = 3, b = 6, c; System.out.println("a = " + a); System.out.println("b = " + b); c = a & b; System.out.println("a & b = " + c);  c = a   ......

// Program to explain the working of Relational Operatorsclass RelationalOpr{public static void main( String args[ ] ){ int a = 20, b = 10; System.out.println( " a = " + a ); System.out.println( " b = " + b ); System.out.println( " a < b = " + ( a < b ) ); System.out.p  ......

// Arithmetic Operator Exampleclass ArithOpr{public static void main( String args[ ] ){ int a = 25, b = 10; float c = 25.5f, d = 4.0f; System.out.println( " a = " + a ); System.out.println( " b = " + b ); System.out.println( " c = " + c ); System.out.println( " d = " +   ......

// Program to use exit() functionclass ExitTest{public static void main( String args[] ){ int a = 10; System.out.println( "AAA" ); if( a == 10 )  System.exit(0); System.out.println( "BBB" );}}Output:AAA

// Program to use of retuen statementclass ReturnTest{public static void main( String args[] ){ int a = 10; System.out.println( "Before return." ); if( a == 10 )  return; System.out.println( "After return." );}} Output:Before return.

This program will show how to use scanner class to take user input.//  Scanner exampleimport java.util.Scanner;class ScannerExample{public static void main( String args[ ] ){ Scanner sc = new Scanner( System.in ); int n;  System.out.print( "Enter a Number : "); n = sc.n  ......

// Simple sum example using command lineclass  Sum{public static void main( String args[ ] ){ int  num1, num2, sum; num1 = Integer.parseInt( args[0] ); num2 = Integer.parseInt( args[1] ); sum = num1 + num2; System.out.println( " Sum = " + sum );}}Output: (In comman

// Input using Console Exampleimport java.io.*;class ConsoleExample{public static void main( String args[ ] ){ Console cn = System.console(); int n;  System.out.print( "Enter a Number : "); n = Integer.parseInt( cn.readLine() ); System.out.println( "The given number : "

// Program to convert Total Number of Days into Years, Months, Weeks and remaing days.class  Days{public static void main( String args[ ] ){   int  days, years, months, weeks;   days = 1050; years = days / 365;   days = days % 365;   months  ......

// Swapping example without third variableclass SwapWithoutThirdVariable{public static void main( String args[ ] ){ int   a, b; a = 10; b = 20; System.out.print("\nBefore Swapping : " ); System.out.print( a + "   " + b ); a = a + b; b = a - b; a = a   ......

// Swapping example using third variableclass  Swap{public static void main( String args[ ] ){ int  a, b, t; a = 10; b = 20;  System.out.print( "\nBefore Swapping :" ); System.out.print( a + "   " + b ); t = a; a = b; b = t;  Syst  ......

// declare variable at endclass  DeclareAtEnd{public static void main( String args[ ] ){ msg = "Hello Java Developer..!";       System.out.println("Message : " + msg);}static String msg;}Output:Message : Hello Java Developer..!

// Program to using final variable within method// to create local constant.class  FinalVar1{public static void main( String args[ ] ){ double r = 10.0, a; final double PI = 3.14159; a = PI * r * r; System.out.println("Area of Circle : " + a);}}Output:Area of Circle : 314.15

//  Program to use final variable to Create constant.class  FinalVar{final static double PI = 3.14159;public static void main( String args[ ] ){ double r = 10.0, a; a = PI * r * r; System.out.println("Area of Circle : " + a);}}Output:Area of Circle : 314.159

// Constant exampleclass Constant1{static final int NUMBER_OF_MONTHS = 12;static final double PI = (double) 22 / 7;public static void main( String args[] ){ System.out.println("NUMBER_OF_MONTHS : " + NUMBER_OF_MONTHS ); System.out.println("PI : " + PI );}}Output:NUMBER_OF_MONTHS : 12PI : 3

// Program to show dynamic variable initialization of variableclass  DynInit{public static void main( String args[ ] ){ double a = 8.0, b = 6.0; // c is dynamically initialized double c = Math.sqrt(a * a + b * b); System.out.println("Hypotenuse is " + c);}}Output:Hypotenuse 

// Boolean variable Exampleclass BoolTest {public static void main(String args[ ]) { boolean b; b = false; System.out.println("b is " + b); b = true; System.out.println("b is " + b); if(b) {    System.out.println("This is executed."); }}}Ou

// Character exampleclass  CharDemo {public static void main(String args[ ]) { char  aChar, bChar; aChar = 88;   // code for X bChar = 'Y'; System.out.print("aChar and bChar : "); System.out.println(aChar + " " + aChar); aChar++;    //  ......

// Simple example of commentsclass Comments{// Your program begins with a call to main().// this is single line commentpublic static void main( String args[ ] ){ System.out.println("Java Programming Examples");/*   This is multiline comment  with multiple lines*/}}Output:Java Pro

// Simple example to calculate Interestclass  CompInterest{public static void main( String args[ ] ){ double a, p, r ,n ,ci; p = 1000; r = 10; n = 3;      a = p * Math.pow(( 1 + ( r / 100.0 ) ), n );      ci = a - p;     System.ou  ......

// Program to convert ruppes to paisapublic class SimpleConversion{   public static void main(String args[])   {                      double n=56.50;           int a=(int) n;    &n  ......

// Program to find area of triangleclass   AreaTriangle{public static void main( String args[ ] ){ double area, a, b, c, s; a = 3; b = 4; c = 5; s = (a + b + c) / 2; area = Math.sqrt( s * (s-a) * (s-b) * (s-c) ); System.out.println("Area of Triangle is = " + a

// Program to find area of circleclass  AreaCircle{ public static void main( String args[ ] ){ double rad; final double PI = 3.14159; rad = 10.0; double area = PI * rad * rad; System.out.print( "\n Area of Circle is = " + area );}}Output:Area of Circle is = 314.159

// Hello World Exampleclass  FirstProgram    {         public static void main( String args[ ] )         {         System.out.println("Hello Java World..!" );         }    }Ou

In this post, we are going to show you arrow function. Watch the below example carefully.<!DOCTYPE html><html><body><h1>JavaScript Functions</h1><h2>The Arrow Function</h2><p>This example shows the syntax of an Arrow Function, and how to use it.&l  ......

Here we have developed one contact list. Which is an array of objects. When any user want to get the contact no. of anybody he is just to pass the value in a function findProp(). findProp(firstValue, secondValue){} this function takes two values firstValue is the name of person of whose yo  ......

In this post, you will see how you can iterate elements of an array in javascript.Note: here we have an array of numbers.We can find the number of elements in this array by using array.length i.e 6. Now we will run for loop six times to print all the elements.All of you know that array starts w  ......

In this post we will see how to make an array of odd numbers using for loop and while loop. We have initialized a blank array with name arr.Code:<!DOCTYPE html><html lang="en"><head>   <meta charset="UTF-8">   <meta name="viewport" content="width=d  ......

In this example, we will see for loop iteration. We have taken one blank array. We will push the values in this array using for loop. Below is the complete example of this action.<!DOCTYPE html><html lang="en"><head>   <meta charset="UTF-8">   <meta nam  ......

In this post we will see while loop in JavaScript. While loop keep working until the condition is true. As soon as the condition is false it stops.For example we have taken one array here and we will push the values in this array with the help of while loop.<!DOCTYPE html><html lang="en">  ......

Create a function that takes length and width and finds the perimeter of a rectangle. ExamplesfindPerimeter(6, 7) ➞ 26findPerimeter(20, 10) ➞ 60findPerimeter(2, 9) ➞ 22 Note: we will make a function findPerimeter which will take two parameters i.e height and width of rectangle. To ca  ......

There is a single operator in JavaScript, capable of providing the remainder of a division operation. Two numbers are passed as parameters. The first parameter divided by the second parameter will have a remainder, possibly zero. Return that value. Examplesremainder(1, 3) ➞ 1remainder(3, 4) �  ......

Create a function that finds the maximum range of a triangle's third edge, where the side lengths are all integers. Examples:nextEdge(8, 10) ➞ 17nextEdge(5, 7) ➞ 11nextEdge(9, 2) ➞ 10 Notes:We will use this algorithm to find the maximum range of a triangle's third edge(side1 + side2)  ......

Write a function that converts hours into seconds. Examples:howManySeconds(2) ➞ 7200howManySeconds(10) ➞ 36000howManySeconds(24) ➞ 86400Notes:   60 seconds in a minute, 60 minutes in an hour <script>function howManySeconds(hour){var seconds = hour * 60 * 60 *;} v  ......

Create a function that takes voltage and current and returns the calculated power.Examples:circuitPower(230, 10) ➞ 2300circuitPower(110, 3) ➞ 330circuitPower(480, 20) ➞ 9600Notes:Requires basic calculation of electrical circuits. Power = voltage * current; We will use this calculation in   ......

Create a function that takes an array containing only numbers and return the first element.Examples:getFirstValue([1, 2, 3]) ➞ 1

getFirstValue([80, 5, 100]) ➞ 80getFirstValue([-500, 0, 50]) ➞ -500Notes:The first element in an array always has an index of 0.Code: <script>function   ......

In this program, we will make a function cubes(number) which will take number as parameter and will return cube of that number.cubes(3) ➞ 27
cubes(5) ➞ 125
cubes(10) ➞ 1000<script>function cubes(number){return number ** 3; //** means power }</script>

Create a function that takes the age in years and returns the age in days.Examples:calcAge(65) ➞ 23725

calcAge(0) ➞ 0

calcAge(20) ➞ 7300 Notes:Use 365 days as the length of a year for this challenge.Ignore leap years and days between last birthday and now.Expect only positive intege  ......

Write a function that takes the base and height of a triangle and return its area.Examples:triArea(3, 2) ➞ 3

triArea(7, 4) ➞ 14

triArea(10, 10) ➞ 50 We will make a function triArea(base, height) which will take two values as parametersNotes:The area of a triangle is: (base * height)  ......

Create a function that takes a number as an argument, increments the number by +1 and returns the result.Examples:addition(0) ➞ 1

addition(9) ➞ 10

addition(-3) ➞ -2 code: <script>function addition(num){return num+1;} addition(0) // output 1addition(9) // output 10add

Write a function that takes an integer minutes and converts it to seconds.Examples:convert(5) ➞ 300

convert(3) ➞ 180

convert(2) ➞ 120 Code<script>function convert(minutes){return minutes * 60;  //1 minutes equals to 60 seconds.}convert(5) // output 300convert(3) // output

Create a function that takes two numbers as arguments and returns their sum.Examplesaddition(3, 2) ➞ 5

addition(-3, -6) ➞ -9

addition(7, 3) ➞ 10 Code: <script>function addition(a, b){return a+b;} addition(3, 2); //output 5addition(-3, -6); //output -9addition(7, 3); 

There are two types of errors in javascript.Syntax error: Syntax errors are mistakes or spelling problems in the code that cause the program to not execute at all or to stop running halfway through. Error messages are usually supplied as well.Logical error: Reasoning mistakes occur when the syntax i  ......

DOM stands for Document Object Model.  DOM is a programming interface for HTML and XML documents.When the browser tries to render an HTML document, it creates an object based on the HTML document called DOM. Using this DOM, we can manipulate or change various elements inside the HTML document.

The charAt() function of the JavaScript string finds a char element at the supplied index. The index number begins at 0 and continues up to n-1, Here n is the string length. The index value must be positive, higher than, or the same as the string length.

Browser Object Model is known as BOM. It allows users to interact with the browser. A browser's initial object is a window. As a result, you may call all of the window's functions directly or by referencing the window. The document, history, screen, navigator, location, and other attributes are avai

The Prototype Pattern produces different objects, but instead of returning uninitialized objects, it produces objects that have values replicated from a template – or sample – object. Also known as the Properties pattern, the Prototype pattern is used to create prototypes.The introduction of bus  ......

In JavaScript, there are several ways to declare or construct an object.Object.using Class.create Method.Object Literals.using Function.Object Constructor.

In javascript, a Set is a collection of unique and ordered elements. Just like Set, WeakSet is also a collection of unique and ordered elements with some key differences:Weakset contains only objects and no other type.An object inside the weakset is referenced weakly. This means, that if the object   ......

A callback function is a method that is sent as an input to another function (now let us name this other function "thisFunction"), and it is performed inside the thisFunction after the function has completed execution.JavaScript is a scripting language that is based on events. Instead of waiting for  ......

Programers build objects, which are representations of real-time entities, in traditional OO programming. Classes and objects are the two sorts of abstractions. A class is a generalization of an object, whereas an object is an abstraction of an actual thing. A Vehicle, for example, is a specializati  ......

A primitive is a data type that isn't composed of other data types. It's only capable of displaying one value at a time. By definition, every primitive is a built-in data type (the compiler must be knowledgeable of them) nevertheless, not all built-in datasets are primitives. In JavaScript, there ar  ......

The variable's data is always a reference for objects, hence it's always pass by value. As a result, if you supply an object and alter its members inside the method, the changes continue outside of it. It appears to be pass by reference in this case. However, if you modify the values of the object v

Javascript can be added to our HTML code in mostly 2 ways:Internal Javascript: Javascript in this case is directly added to the HTML code by adding the JS code inside the <script> tag, which can be placed either inside the <head> or the <body> tags based on the requirement of the u  ......

Following are the features of javascript:It was developed with the main intention of DOM manipulation, bringing forth the era of dynamic websites.Javascript functions are objects and can be passed in other functions as parameters.Can handle date and time manipulation.Can perform Form Validation.A co

With javascript you can insert content in your html document. This is the most popular feature of javascript programming. Here is the example of how you can insert element in your html document.<html> 
<head> 
<title>inserting new components dynamically</title&g  ......

const findVowels = str => {
  let count = 0
  const vowels = ['a', 'e', 'i', 'o', 'u']
  for(let char of str.toLowerCase()) {
    if(vowels.includes(char)) {
      count++
    }
  }
  return count
}

In ECMAScript 5, a new feature called JavaScript Strict Mode allows you to write a code or a function in a "strict" operational environment. In most cases, this language is 'not particularly severe' when it comes to throwing errors. In 'Strict mode,' however, all forms of errors, including silent er  ......

NaN property represents the “Not-a-Number” value. It indicates a value that is not a legal number.typeof of NaN will return a Number.To check if a value is NaN, we use the isNaN() function,Note- isNaN() function converts the given value to a Number type, and then equates to NaN.isNaN("Hello") &n  ......

JavaScript is a dynamically typed language. In a dynamically typed language, the type of a variable is checked during run-time in contrast to a statically typed language, where the type of a variable is checked during compile-time.Since javascript is a loosely(dynamically) typed language, variables   ......

Some differences are From the very beginning, the 'var' keyword was used in JavaScript programming whereas the keyword 'let' was just added in 2015.The keyword 'Var' has function scope. Anywhere in the function, the variable specified using var is accessible but in ‘let’ the scope of a vari  ......

Both are comparison operators. The difference between both the operators is that “==” is used to compare values whereas, “ === “ is used to compare both values and types.var x = 2;
var y = "2";
(x == y)  // Returns true since the value of both x and y is the same
(x === y) // Returns

The debugger for the browser must be activated in order to debug the code. Built-in debuggers may be switched on and off, requiring the user to report faults. The remaining section of the code should stop execution before moving on to the next line while debugging.Learn more javascript mcqs here.&nb

Hoisting is the default behaviour of javascript where all the variable and function declarations are moved on top.This means that irrespective of where the variables and functions are declared, they are moved on top of the scope. The scope can be both local and global.Example 1:hoistedVariable = 3;
  ......

In Java, a class is a user-defined data type from which objects are created. It can also be called as a blueprint or prototype. A class is a collection of various methods and variables which represent a set of properties that are common to all the objects of one type. A class includes components suc  ......

An object is a basic entity in an object-oriented programming language that represents the real-life entities. Many objects are created by a java program that interacts with the invoking methods. The state of an object is represented by its attributes and reflects its properties. The behavior of an   ......

Java and Python, both the languages hold an important place in today’s IT industry. But in some factors, one is better than the other. Such factors are:Java is easy to use, whereas Python is very good in this case.The speed of coding in Java is average, whereas in Python it is excellent.In Java, t  ......

The major features of Java are listed below: –Object-oriented: – Java language is based on object-oriented programming. In this, the class and the methods describe the state and behavior of an object. The programming is done by relating a problem with the real world object.Portable: – the conv  ......

If we want to execute a statement or a block of statements repeatedly in java, then loops are used. And such a process is known as looping. There are basically 3 types of looping. They are: –"For loop": – for executing a statement or a set of statements for a given number of times, for loops are  ......

Access specifiers in java are the keywords which define the access scope of the function. It can be used before a class or a method. There are basically 4 types of access specifiers in java: –Public: – class, methods, and fields are accessible from anywhere.Protected: – methods and fields are   ......

It is important to understand the difference between JDK, JRE, and JVM in Java.JVM (Java Virtual Machine):  Java virtual machine is actually an abstract machine which provides a runtime environment in which the java bytecode gets executed. A JVM performs some main tasks such as- loading, verify  ......

Call by value: A process in which the values of the actual parameters sent by the calling function are copied to the formal parameters of the called function.Call by reference: A process in which the parameters of a calling function are passed to the parameters of the called function using

In order to load the Java Classes into a virtual environment, Classloader are used. A class loader will load key classes such as java.lang.object and several other codes into the memory. Usually, these classes are loaded only if a demand occurs. Since Java Runtime Environment includes loaders, they   ......

The need of Java is that it enforces an object-oriented programming model and can be used to create complete applications that can run on a single computer or be distributed across servers and clients in a network thus it can easily build mobile applications or run on desktop applications that use d

To know the type of a JavaScript variable, we can use the typeof operator.Primitive types String - It represents a series of characters and is written with quotes. A string can be represented using a single or a double quote.Example :var str = "Vivek Singh Bisht"; //using double quotes
var str  ......

Some of the disadvantages of JavaScript are:

a)    No support for multithreading
b)    No support for multiprocessing
c)    Reading and writing of files is not allowed
d)    No support for networking applications.

Some of the advantages of JavaScript are:

a)    Server interaction is less
b)    Feedback to the visitors is immediate
c)    Interactivity is high
d)    Interfaces are richer

JavaScript was developed by Brendan Eich, who was a Netscape programmer. Brendan Eich developed this new scripting language in just ten days in the year September 1995. At the time of its launch, JavaScript was initially called Mocha. After that, it was called Live Script and later known as JavaScri

Some of the features of JavaScript are:
1.    Lightweight
2.    Interpreted programming language
3.    Good for the applications which are network-centric
4.    Complementary to Java
5.    Complementary to HTML
6.    Open source
7.    Cross-platform 

JavaScript is a scripting language. It is different from Java language. It is object-based, lightweight, cross-platform translated language. It is widely used for client-side validation. The JavaScript Translator (embedded in the browser) is responsible for translating the JavaScript code for the we