Reversing Character Bytes in Java

Introduction

Java reverseBytes() method is a part of Character class which returns the values obtained by reversing the order of bytes for the specified character. In this lab, we will learn how to use this method step-by-step.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL java(("`Java`")) -.-> java/ProgrammingTechniquesGroup(["`Programming Techniques`"]) java(("`Java`")) -.-> java/ObjectOrientedandAdvancedConceptsGroup(["`Object-Oriented and Advanced Concepts`"]) java(("`Java`")) -.-> java/BasicSyntaxGroup(["`Basic Syntax`"]) java(("`Java`")) -.-> java/StringManipulationGroup(["`String Manipulation`"]) java(("`Java`")) -.-> java/SystemandDataProcessingGroup(["`System and Data Processing`"]) java/ProgrammingTechniquesGroup -.-> java/scope("`Scope`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/classes_objects("`Classes/Objects`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/class_methods("`Class Methods`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/exceptions("`Exceptions`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/modifiers("`Modifiers`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/oop("`OOP`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/packages_api("`Packages / API`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/user_input("`User Input`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/wrapper_classes("`Wrapper Classes`") java/BasicSyntaxGroup -.-> java/identifier("`Identifier`") java/BasicSyntaxGroup -.-> java/data_types("`Data Types`") java/BasicSyntaxGroup -.-> java/operators("`Operators`") java/BasicSyntaxGroup -.-> java/output("`Output`") java/StringManipulationGroup -.-> java/strings("`Strings`") java/BasicSyntaxGroup -.-> java/variables("`Variables`") java/SystemandDataProcessingGroup -.-> java/system_methods("`System Methods`") subgraph Lab Skills java/scope -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/classes_objects -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/class_methods -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/exceptions -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/modifiers -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/oop -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/packages_api -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/user_input -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/wrapper_classes -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/identifier -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/data_types -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/operators -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/output -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/strings -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/variables -.-> lab-117576{{"`Java Character reverseBytes Method`"}} java/system_methods -.-> lab-117576{{"`Java Character reverseBytes Method`"}} end

Create a Scanner object

Create an object of Scanner class to take user input.

import java.util.Scanner;

public class ReverseBytes{
    public static void main(String args[]){
        Scanner input = new Scanner(System.in);
    }
}

Take user input

Take a character as user input and store it in a variable.

import java.util.Scanner;

public class ReverseBytes{
    public static void main(String args[]){
        Scanner input = new Scanner(System.in);
        System.out.print("Enter a character: ");
        char character = input.next().charAt(0);
    }
}

Reverse bytes of the entered character

Use the reverseBytes() method to reverse the bytes of the entered character.

import java.util.Scanner;

public class ReverseBytes{
    public static void main(String args[]){
        Scanner input = new Scanner(System.in);
        System.out.print("Enter a character: ");
        char character = input.next().charAt(0);
        char reverseBytesCharacter = Character.reverseBytes(character);
    }
}

Display the reverse bytes of the entered character

Display the reverse bytes of the entered character after reversing the bytes.

import java.util.Scanner;

public class ReverseBytes{
    public static void main(String args[]){
        Scanner input = new Scanner(System.in);
        System.out.print("Enter a character: ");
        char character = input.next().charAt(0);
        char reverseBytesCharacter = Character.reverseBytes(character);
        System.out.println("Reverse bytes of "+character+ " is "+reverseBytesCharacter);
    }
}

Handle exceptions

Handle any exceptions. Use a try-catch block to handle exceptions.

import java.util.Scanner;

public class ReverseBytes{
    public static void main(String args[]){
        try{
            Scanner input = new Scanner(System.in);
            System.out.print("Enter a character: ");
            char character = input.next().charAt(0);
            char reverseBytesCharacter = Character.reverseBytes(character);
            System.out.println("Reverse bytes of "+character+ " is "+reverseBytesCharacter);
        } catch(Exception e){
            System.out.println("Invalid input. Please enter a valid character.");
        }
    }
}

Summary

In this lab, we learned how to use the reverseBytes() method of the Character class in Java to reverse the bytes of a character. We also learned how to handle exceptions that may occur during user input.

Java Character reverseBytes Method