Java program to create a StringBuffer object and to append characters and to display the capacity and length

Question

To write a java program to create a StringBuffer object and illustrate how to append characters and to display the capacity and length of the string buffer 

Answer 1

Program Code

import java.util.*; public class Demo {   public static void main(String[] args)   {     StringBuffer sb=new StringBuffer("Welcome to goeduhub");     System.out.println(sb);     System.out.println("Initial capacity: "+sb.capacity());     sb.append(" Technologies ");     System.out.println(sb);     sb.append("p"); //appending characters     sb.append("i");     sb.append("n ");     System.out.println(sb);     sb.append("302012");     System.out.println(sb);     System.out.println("Length of StringBuffer object:  "+sb.length());     System.out.println("Final capacity: "+sb.capacity());    } }

Output

Welcome to goeduhub Initial capacity: 35 Welcome to goeduhub Technologies Welcome to goeduhub Technologies pin Welcome to goeduhub Technologies pin 302012 Length of StringBuffer object: 43 Final capacity: 72

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