StringBuffer In Java

StringBuffer In Java:

package one;

public class StringBuffer {


public static void main(String[] args) {

java.lang.StringBuffer sb=new java.lang.StringBuffer("Hello "); 
System.out.println(sb.capacity());

sb.append("Java");
System.out.println(sb);

sb.insert(2," haha ");
System.out.println(sb);

sb.replace(1, 4, "huhuhuhu");
System.out.println(sb);

sb.ensureCapacity(10);
System.out.println(sb.capacity());

sb.delete(1, 18);
System.out.println(sb);
System.out.println(sb.capacity());

sb.reverse();
System.out.println(sb);

} 
}