Reverse a String in Java Using Java API

Reverse a string using java existing API is really very easy. Below example will show you how to reverse the string using StringBuilder class.

package com.techbyteslearn.www;

public class ReverseString {

    /**
     * @param args
     */
    public static void main(String[] args) {

        String inputString = "javadevelopersguide";

        System.out.println("Before Reverse:: " + inputString);

        // You can do this using StringBuffer also, based on your requirement.
        // If you are concerned about thread safety, use StringBuffer.
        StringBuilder builder = new StringBuilder(inputString).reverse();

        // After reverse using StringBuilder
        inputString = builder.toString();

        System.out.println("After Reverse:: " + inputString);
    }
}
​

Output :-

Before Reverse::javadevelopersguide

After Reverse:: ediugsrepolevedavaj