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StringBuffer deleteCharAt() Method in Java with Examples

  • Difficulty Level : Basic
  • 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:

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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:




// Java program to demonstrate working
// of StringBuffer.deleteCharAt() method
  
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);
  
        // Deleting the character at indexpoint 5
        sbf.deleteCharAt(5);
        System.out.println("After deletion new StringBuffer = " + sbf);
    }
}

Output:

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

Program 2:




// Java program to demonstrate working
// of StringBuffer.deleteCharAt() method
  
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);
  
        // Deleting the character at indexpoint 5
        sbf.deleteCharAt(5);
        System.out.println("After deletion new StringBuffer = " + sbf);
    }
}

Output:

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

Program 3:




// Java program to demonstrate working
// of StringBuffer.deleteCharAt() method
  
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);
  
        // Deleting the character at indexpoint -5
        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)



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