Java.lang.StringBuffer.substring() Method



The java.lang.StringBuffer.substring(int start, int end) method returns a new String that contains a subsequence of characters currently contained in this sequence. The substring begins at the specified start and extends to the character at index end - 1.


Following is the declaration for java.lang.StringBuffer.substring() method

public String substring(int start, int end)


  • start − This is the start index, inclusive.

  • end − This is the ending index, exclusive.

Return Value

This method returns the new string.


StringIndexOutOfBoundsException − if start or end are negative or greater than length(), or start is greater than end.


The following example shows the usage of java.lang.StringBuffer.substring() method.

package com.tutorialspoint;

import java.lang.*;

public class StringBufferDemo {
   public static void main(String[] args) {
      StringBuffer buff = new StringBuffer("admin");
      System.out.println("buffer = " + buff);

      // prints substring from index 3
      System.out.println("substring is = " + buff.substring(3));

      /* prints substring from index 1 to 4 excluding character at 4th index */
      System.out.println("substring is = " + buff.substring(1, 4));

Let us compile and run the above program, this will produce the following result −

buffer = admin
substring is = in
substring is = dmi