stringBuffer insert(index, obj) function example in Java

// 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.insert(0, "JAV");
 System.out.println(" String 2 = " + sb);
 sb.insert(4, new char[ ] {' ', 'C', 'o', 'm', 'p'} );
 System.out.println(" String 3 = " + sb);
 sb.insert(0, true);
 System.out.println(" String 4 = " + sb);
 sb.insert(0, 10);
 System.out.println(" String 5 = " + sb);
 sb.insert(0, 20l);
 System.out.println(" String 6 = " + sb);
 sb.insert(0, 30.5f);
 System.out.println(" String 7 = " + sb);
 sb.insert(0, 40.5d);
 System.out.println(" String 8 = " + sb);
}
}

Output:
String 1 = A
String 2 = JAVA
String 3 = JAVA Comp
String 4 = trueJAVA Comp
String 5 = 10trueJAVA Comp
String 6 = 2010trueJAVA Comp
String 7 = 30.52010trueJAVA Comp
String 8 = 40.530.52010trueJAVA Comp