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:

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

Output:

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

Example 2

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

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 = javatpoint

Example 3

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

Output:

string: javatpoint
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.

Output:

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