Java StringBuffer deleteCharAt() Method with Examples

by Online Tutorials Library July 22, 2022

Java StringBuffer deleteCharAt(int index) method

The deleteCharAt(int index) method of Java StringBuffer class is used to delete the character at a specified position of this sequence. After deleting a character, the current sequence shortened by one character.

Syntax:

Parameter:

DataType	Parameter	Description
int	index	The index is location of character which is to delete.

Returns:

This deleteCharAt(int index) method returns this object.

Exception:

StringIndexOutOfBoundsException – if the index is negative or greater than or equal to length() of string buffer.

Compatibility Version:

Java 1.2 and above

Example 1

  public class StringBufferDeleteCharAtExample1 {  public static void main(String[] args) {  StringBuffer sb = new StringBuffer(“tutoraspire”);      System.out.println(“string1: ” + sb);      // deleting the character at index 4      sb = sb.deleteCharAt(4);      System.out.println(“After deleting: ” + sb);           sb = new StringBuffer(“hello java”);      System.out.println(“string2: ” + sb);      // deleting the character at index 5      sb = sb.deleteCharAt(5);      System.out.println(“After deleting: ” + sb);  }  }  

Test it Now

Output:

string1: TutorAspire After deleting: javapoint  string2: hello java  After deleting: hellojava

Example 2

This deleteCharAt(int) method throw the exception while providing the negative index value.

  public class StringBufferDeleteCharAtExample2 {  public static void main(String[] args) {  StringBuffer sb = new StringBuffer(“tutoraspire”);      System.out.println(“string1: ” + sb);      // try to delete the character at index value negative      sb = sb.deleteCharAt(-1);      System.out.println(“After deleting: ” + sb);  }  }  

Test it Now

Output:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1  at java.lang.AbstractStringBuilder.deleteCharAt(Unknown Source)  at java.lang.StringBuffer.deleteCharAt(Unknown Source)  at StringBufferDeleteCharAtExample2.main(StringBufferDeleteCharAtExample2.java:6)  string1 = TutorAspire

Example 3

Deleting the character at the index value of Character.charCount(thisSequence.codePointAt(index)) method.

  public class StringBufferDeleteCharAtExample3 {  public static void main(String[] args) {  StringBuffer sb = new StringBuffer(“tutoraspire”);      System.out.println(“string: ” + sb);      // deleting string buffer using character count at code point      int cp = sb.codePointAt(0);      System.out.println(“codepoint at 0: “+cp);      int totalCharacter =Character.charCount(cp);      System.out.println(“total character at codepoint “+cp+” : ” + totalCharacter);      sb = sb.deleteCharAt(totalCharacter);      System.out.println(“after deleting at index “+totalCharacter +”: “+ sb);  }  }   

Test it Now

Output:

string: TutorAspire codepoint at 0: 106  total character at codepoint 106 : 1  after deleting at index 1: jvatpoint

Example 4

In this example, we are taking the input string and index of character from a user.

  import java.util.Scanner;    public class StringBufferDeleteCharAtExample4 {  public static void main(String[] args) {      StringBuffer sb = new StringBuffer(“”);            System.out.print(“enter your string value: “);      Scanner sc = new Scanner(System.in);      sb.append(sc.nextLine());            System.out.print(“enter index: “);          int index = sc.nextInt();                // deleting the character at input index          System.out.println(“after deleting resultant string: “+sb.deleteCharAt(index));      sc.close();  }  }  

Output:

enter your string value: hello string  enter index: 3  after deleting resultant string: helo string

Next TopicStringBuffer class

append capacity()charAt()codePointAt()codePointBefore()codePointCount()delete ensureCapacity()getChars()indexOf()insert java lastIndexOf()length replace()setCharAt()setLength()StringBuffer

Java StringBuffer deleteCharAt() Method with Examples

Java StringBuffer deleteCharAt(int index) method

Syntax:

Parameter:

Returns:

Exception:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

Scatter | Gather | Vectored IO

C# Implicitly Typed Local Variable

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