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Java StringBuilder reverse()

Last Updated: October 4, 2022 by Chaitanya Singh | Filed Under: java

Java StringBuilder reverse() method is used to reverse a given character sequence.

Syntax of reverse() method:

sb.reverse(); //reverses the string represented by sb

Here, sb is an object of Java StringBuilder class.

reverse() Description

public StringBuilder reverse(): A StringBuilder instance represents a character sequence (a string). This method replaces the existing character sequence by reverse sequence.

reverse() Parameters

  • This method does not take any parameter.

reverse() Return Value

  • It returns a StringBuilder instance that contains the reverse of the given sequence.

Example 1: Reversing a String

public class JavaExample {
  public static void main(String[] args) {
    StringBuilder sb = new StringBuilder("Tomato");
    System.out.println("Given String: "+sb);
    //reverse the String "Tomato"
    sb.reverse();

    //print reverse string
    System.out.println("Reverse String: "+sb);
  }
} 

Output:

Java StringBuilder reverse() Example Output_1

Example 2: Reversing user entered String

import java.util.Scanner;
public class JavaExample {
  public static void main(String[] args) {
    StringBuilder sb = new StringBuilder("");
    //take user input
    System.out.print("Enter any String: ");
    Scanner scan = new Scanner(System.in);
    String str = scan.nextLine();
    sb.append(str);
    System.out.println("Entered String: "+sb);

    //reverse the user entered string
    sb.reverse();

    //print reverse string
    System.out.println("Reverse String: "+sb);
  }
} 

Output:

Java StringBuilder reverse() Example Output_2

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Tags: Java-StringBuilder

About the Author

I have 15 years of experience in the IT industry, working with renowned multinational corporations. Additionally, I have dedicated over a decade to teaching, allowing me to refine my skills in delivering information in a simple and easily understandable manner.

– Chaitanya

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