Java Topics

 What are the super most classes for all the streams?

 What are the FileInputStream and FileOutputStream?

 Why do we need abstract classes in java?

 What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class hierarchy?

 What do you understand by an IO stream in Java?

 What is the difference between System.out, System.err, and System.in?

 What is a static variable in Java?

 Explain the difference between instance variable and a class variable

 What is the default value stored in Local Variables?

 What is a Class Variable?

 What are the default values assigned to variables and instances in Java?

 Differentiate between instance and local variables.

 Why do we need wrapper classes?

 What is the default value of byte datatype in Java?

 Can we declare Pointer in Java?

 When a byte datatype is used in Java?

 Explain different data types in Java.

 What are Packages in Java? Why Packages are used? What are the advantages of Packages in Java?

 What will happen if we declare don’t declare the main as static?

 What is Java String Pool?

 Explain public static void main(String args[]) in Java.

 What is Bytecode in the Development Process

 What is Java Virtual Machine (JVM)?

 Create a method named calc, which accepts an integer (int), a character (char) and one more integer (int), and depending on the character, returns the result

 Create a method named greeting, which accepts a string (String) and an integer (int), and display custom output

 Write a program that evenly distributes the elements of the array named array among the array1, array2 and array3 In java

 Create sqr and cube methods that take an integer (int) and return its square and cube, respectively.

 Write a program which triples (*3) every third element, starting with 0, in the existing array named array.

 How to reverse a String in java? Can you write a program without using any java inbuilt methods?

 Ball Game example In Java

 Program to read data from file using FileInputStream and display it on the monitor in Java

 Program to read data from keyboard and write it to the file using FileOutputStream in Java

 Program to use File class and its methods in Java

 Client \ Server program using Socket and ServerSocket class in Java

 Write a Client \Server program using DatagramPacket and DatagramSocket class in Java

 Program to use URLConnection class in Java

 Program to display all parts of URL in Java

 Program to Display host name by IP address in Java

 Program to create Menu in AWT in Java

 Program to explain Dialog class in Java

 Program to use GridBagLayout in Java

 Program to explain CardLayout in Java

 Program to use GridLayout in Java

 Program to use Insets in Java

 Program to use BorderLayout in Java

 Program to use FlowLayout in Java

 Program to use Scrollbar AWT control in Java

 Program to use List AWT control in Java

 Program to use Choice AWT control in Java

 Program to use CheckboxGroup ( RadioButton ) AWT control in Java

 Program to use Checkbox AWT control in Java

 Program to use TextArea AWT control in Java

 Program to use TextField AWT control in Java

 AWT frame class example in Java

 AWT button example in Java

 AWT Label example in Java

 Program to use Window Event in Java

 Program to expain Fucus Event in Java

 Program to use MouseAdapter class as a Anonymous Inner  class in Java

 Program to use MouseAdapter class as Inner class in Java

 Program to use MouseAdapter class in Java

 Program to explain Key Event with Virtual Key in Java

 Program to explain Key Event in Java

 Program to explain Mouse Event and Mouse Motion Event in Java

 Program to explain Mouse Motion Event in Java

 Program to explain Mouse Event in Java

 Program to change color using setColor() method in Java

 Program to change Font using setFont() method in Java

 Program to draw Polygon in Applet using drawPolygon() method in Java

 Program to draw Arc in Applet using fillArc() method in Java

 Program to draw Arc in Applet using drawArc() method in Java

 Program to draw oval in Applet using fillOval() method in Java

 Program to draw oval in Applet using drawOval() method in Java

 Program to draw rounded rectangle in Applet using fillRoundRect() method in Java

 Program to draw rounded rectangle in Applet using drawRoundRect() method in Java

 Program to draw rectangle in Applet using fillRect() method in Java

 Program to draw rectangle in Applet using drawRect() method in Java

 Program to draw line in Frame using drawLine() method in Java

 Program to draw line in Applet using drawLine() method in Java

 toString() method in spring buffer in Java

 subString() method example in stringBuffer in Java

 setLength() method example in Java

 Use of setCharAt() method in Java

 capacity() method example in Java

 stringBuffer append example in Java

 stringBuffer() example in Java

 lastIndexOf() method example in Java

 index of() method example in Java

 subString() method example in Java

 valueOf() method example in Java

 trim() method example in Java

 toUpperCase() method example in Java

 toLowerCase() method example in Java

 split() method example in Java

 regionMatches() method example in Java

 getChars() method example in Java

 compareTo() method example in Java

 Difference between equals and == operator in Java

 equalsIgnoreCase() function example in Java

 length() function example in Java String

 Java Program to use charAt function in string

 Make string using ASCII value in Java

 Simple string function example in Java

 Simple string example in Java

 Initialise 2D array in Java

 Jagged array example in Java

 Jav Program to find sum of two matrices

 Program to find transpose of matrix without using another metrix in Java

 Transpose of the array in Java

 Matrix of array example in Java

 Make 2D array by taking user input through keyboard in Java

 Iterate 2D array in Java

 Program for Sum of 2D array elements in Java

 Merge sort example in Java

 Quick sort example in Java

 Selection sort example in Java

 Insertion sort example in Java

 Bubble sort example in java

 Fibonacci series using Array in Java

 Setup spring application with Configuration file and Annotations Everything from Scratch

 Array Example in C++

 Program to compare Strings in C++ (strcmp function in C++)

 All C++ Functions List Alphabatically

 String Literal in case of Switch in Java

 Type of byte using Switch case in Java

 Find Odd Even using Switch statement in Java

 Find Day by day number using switch statement in Java

 Simple Switch case example in Java

 Program to find commission of salesman by given commission rate in Java

 Simple program to check day by day number using if elsein Java

 Program to find whether number is positive or negative in Java

 Program to find leap year in Java

 Program to calculate commission of salesman in Java

 Nested if-else example in Java

 Nested if example in Java

 Program to Find maximum number using third Variable in Java

 Program to find Odd Even in Java

 Program to Find maximum number in Java

 If else example in Java

 Simple If statement example in Java 2

 Simple If statement example in Java

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