deleteCharAt() StringBuffer Example

To manipulate string, java.lang.StringBuffer class comes with many methods, otherwise which will take long laborious coding as in C/C++. One such method is deleteCharAt() StringBufferthat deletes a single character.

What Java API says about deleteCharAt() StringBuffer:

• public synchronized java.lang.StringBuffer deleteCharAt(int index1): Deletes a single character from buffer at index number index1. Throws StringIndexOutOfBoundsException if the argument is more than buffer size.

Following deleteCharAt() StringBuffer example illustrates.

public class Demo
{
  public static void main(String args[])
  {						
   StringBuffer sb1 = new StringBuffer("ABCDEFGHI");
   
   System.out.println("Original string buffer sb1 before delete: " + sb1);
   System.out.println("Number of characteres in sb1 before delete: " + sb1.length());  

   sb1.deleteCharAt(2);                         // deletes char at index number 2

   System.out.println("String buffer sb1 after calling deleteCharAt(2): " + sb1);  
   System.out.println("Number of characteres in sb1 after delete: " + sb1.length());  

   sb1.deleteCharAt(100);
 }
}

Output screenshot on deleteCharAt() StringBuffer Example

sb1.deleteCharAt(2);

Deletes the character at index number 2. That is, one character is deleted. We have seen earlier how to delete a group of characters.

sb1.deleteCharAt(100);

Throws StringIndexOutOfBoundsException as 100 index number does not exist in StringBuffer object sb1.

Another method exists with similar functionality delete() StringBuffer Example.

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