Click here to watch in Youtube :
https://www.youtube.com/watch?v=-HCkKmqVs4k&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge

Java Tutorial : Java StringBuffer [setLength(int newLength) method]

StringBufferDemo.java

/*
 * public void setLength(int newLength)
 * 
 * Parameters: 
 * ---------- 
 * newLength - the new length
 * 
 * Throws: 
 * ------ 
 * IndexOutOfBoundsException - if the newLength 
 * argument is negative.
 */
public class StringBufferDemo
{

    public static void main(String[] args)
    {
        String str = "Welcome";
        StringBuffer sb = new StringBuffer(str);
        System.out.println("Before setLength, sb = " + sb);
        System.out.println("Before setLength, sb = " + sb.length());

        sb.setLength(3);
        
        System.out.println("After setLength, sb = " + sb);
        System.out.println("After setLength, sb = " + sb.length());

    }
}