StringBuffer deleteCharAt() Method in Java with Examples (original) (raw)

Last Updated : 06 Dec, 2018

The Java.lang.StringBuffer.deleteCharAt() is a built-in Java method which removes the char at the specified position in this sequence. So that the sequence is reduced by 1 char.

Syntax:

public StringBuffer deleteCharAt(int indexpoint)

Parameters : The method accepts a single parameter indexpoint of integer type which refers to the index of the char to be removed.
Return Value: The function returns the string or returns this object after removing the character.
Exception : If the indexpoint is negative or greater than or equal to length(), then the method throws StringIndexOutOfBoundsException.

Examples:

Input : StringBuffer = worldofgeeks int indexpoint = 4 Output : worlofgeeks

Below programs illustrate the working of StringBuffer.deleteCharAt() method:
Program 1:

import java.lang.*;

public class Geeks {

`` public static void main(String[] args)

`` {

`` StringBuffer sbf = new StringBuffer( "raghav" );

`` System.out.println( "String buffer before deletion = " + sbf);

`` sbf.deleteCharAt( 5 );

`` System.out.println( "After deletion new StringBuffer = " + sbf);

`` }

}

Output:

String buffer before deletion = raghav After deletion new StringBuffer = ragha

Program 2:

import java.lang.*;

public class Geeks {

`` public static void main(String[] args)

`` {

`` StringBuffer sbf = new StringBuffer( "GeeksforGeeks" );

`` System.out.println( "String buffer before deletion = " + sbf);

`` sbf.deleteCharAt( 5 );

`` System.out.println( "After deletion new StringBuffer = " + sbf);

`` }

}

Output:

String buffer before deletion = GeeksforGeeks After deletion new StringBuffer = GeeksorGeeks

Program 3:

import java.lang.*;

public class Geeks {

`` public static void main(String[] args)

`` {

`` StringBuffer sbf = new StringBuffer( "Abhishek" );

`` System.out.println( "String buffer before deletion = " + sbf);

`` sbf.deleteCharAt(- 5 );

`` System.out.println( "After deletion new StringBuffer = " + sbf);

`` }

}

Output:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -5 at java.lang.AbstractStringBuilder.deleteCharAt (AbstractStringBuilder.java:824) at java.lang.StringBuffer.deleteCharAt(StringBuffer.java:441) at Geeks.main(Geeks.java:14)