StringBuilder reverse() in Java with Examples

The reverse method of the StringBuilder class is used to reverse the sequence of characters in a StringBuilder object. The original sequence is modified in-place, making it useful for dynamic string manipulation, palindrome checks, and efficient character sequence operations without creating new string objects.

Original String: Hello
Reversed String: olleH

Explanation: The original StringBuilder "Hello" is reversed in-place using reverse(), producing "olleH".

Syntax

public StringBuilder reverse()

• Returns: A StringBuilder object containing the reversed character sequence.
• Example: This code demonstrates reversing a StringBuilder using the reverse() method in Java.

Example: Reversing Words Using StringBuilder

String = WelcomeGeeks
Reverse String = skeeGemocleW

Explanation: The program converts the given string into a StringBuilder object so it can be modified. The reverse() method reverses all characters in the sentence, and the result is printed to the console.

Related Topics

• StringBuilder class in Java
• StringBuffer.reverse()
• StringBuilder.append()
• Palindrome check using StringBuilder.reverse()