StringBuilder reverse() in Java with Examples (original) (raw)

Last Updated : 11 Dec, 2022

The reverse() method of StringBuilder is used to reverse the characters in the StringBuilder. The method helps to this character sequence to be replaced by the reverse of the sequence. Syntax:

public java.lang.AbstractStringBuilder reverse()

Returns: This method returns StringBuilder object after reversing the characters. Below programs illustrate the java.lang.StringBuilder.reverse() method: Example 1:

Java

class GFG {

`` public static void main(String[] args)

`` {

`` StringBuilder str

`` = new StringBuilder("WelcomeGeeks");

`` System.out.println("String = "

`` + str.toString());

`` StringBuilder reverseStr = str.reverse();

`` System.out.println("Reverse String = "

`` + reverseStr.toString());

`` }

}

Output:

String = WelcomeGeeks Reverse String = skeeGemocleW

Example 2:

Java

class GFG {

`` public static void main(String[] args)

`` {

`` StringBuilder str

`` = new StringBuilder("AAAABBBCCCC");

`` System.out.println("String = "

`` + str.toString());

`` StringBuilder reverseStr = str.reverse();

`` System.out.println("Reverse String = "

`` + reverseStr.toString());

`` }

}

Output:

String = AAAABBBCCCC Reverse String = CCCCBBBAAAA

References: https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuilder.html#reverse()

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