Reverse a String in Java with Source Code – String Builder / String Buffer Class is used to reverse a string. The inbuilt method reverse() in StringBuffer and StringBuilder is used to reverse the characters in the StringBuffer.

The character sequence is replaced in reverse order using this method.

We have included a downloadable zip file at the end of the program so that you may run the following codes.

Example Program:

package reverseastring;
import java.util.Scanner;
public class ReverseAstring {


    public static void main(String[] args) {
     
        ReverseAstring rev = new ReverseAstring();
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a string : ");
        String str = sc.nextLine();
        System.out.println("Reverse of a String  is : " + rev.reverse(str));
    }

    static String reverse(String s) {
        String rev = "";
        for (int j = s.length(); j > 0; --j) {
            rev = rev + (s.charAt(j - 1));
        }
        return rev;
    }
}

Output:

//Reverse a String in Java: Sample Code Output

Enter a string : hello world
Reverse of a String  is : dlrow olleh

What is the importance of Reversing a string in a Java Program?

Reversing a string is a technique that reverses or changes the order of a given string so that the last character becomes the first character, and so on.

We can also test the Palindrome of a given string by reversing the original string.

Java is an object-oriented, cross-platform programming language with excellent memory management and security capabilities. It also supports multithreading, allowing you to write code that performs multiple tasks at once.

As a result, beginners should concentrate on mastering this simple problem project.

What is the use of reversing a string in Java?

The Java StringBuffer class’s reverse() method is used to replace this character sequence with the reverse of the sequence.

If the sequence contains any surrogate pairs, the reverse operation treats them as a single character.

The REVERSE function takes a character expression as an argument and returns a string with the ordinal positions of all logical characters reversed.

The REVERSE function’s argument cannot be of a user-defined data type.

About the Project

The Java project below covers all of the necessary and vital elements that can be used for college projects by first-year, second-year, and final-year IT students.

The project is entirely written in Java and built in the Netbeans code editor.

Project Details and Technology

Project Name:	Reverse a String in Java with Source Code
Abstract	The Reverse a String in Java will teach beginners a useful project that will help them improve their programming skills.
Language/s Used:	Java
Java version (Recommended):	8
Database:	N/A
Type:	Desktop Application
Developer:	sourcecodehero
Updates:	0

To start executing a Reverse a String in Java, make sure that you have NetBeans IDE or any platform of code editor installed on your computer.

How to reverse a string in Java: Follow the steps below

Time needed: 3 minutes

Step 1: Download Source Code
To get started, find the downloaded source code file below and click to start downloading it.
Step 2: Extract File
Navigate to the file’s location when you’ve finished downloading it and right-click it to extract it.
Step 3: Run the project
Next, open NetBeans IDE and click open project, and choose your download.
Step 4: Run the project.
Next, right-click the project folder and click run.