1. Introduction

Converting a String to a byte array is a common programming task. In Java, this can be accomplished using the getBytes method of the String class. This method encodes the String into a sequence of bytes using the platform’s default charset and returns the resulting byte array.

2. Program Steps

1. Create a Java class and define the main method.

2. Define the input String that you want to convert to a byte array.

3. Use the getBytes method to convert the String to a byte array.

4. Print the original String and the resulting byte array.

3. Code Program

public class StringToByteArray {

    public static void main(String[] args) {
        // Step 2: Define the input String
        String str = "Hello, World!";

        // Step 3: Use the getBytes method to convert the String to a byte array
        byte[] byteArray = str.getBytes();

        // Step 4: Print the original String and the resulting byte array
        System.out.println("Original String: " + str);
        System.out.print("Byte Array: ");
        for(byte b : byteArray) {
            System.out.print(b + " ");
        }
    }
}

Output:

Original String: Hello, World!
Byte Array: 72 101 108 108 111 44 32 87 111 114 108 100 33

4. Step By Step Explanation

– Step 1: A Java class named StringToByteArray is created, and the main method is defined.

– Step 2: The input String str is defined, which we want to convert to a byte array.

– Step 3: The getBytes method of the String class is used to convert str to a byte array byteArray.

– Step 4: The original String and the resulting byte array are printed to the console.

In this way, the program effectively converts a String to a byte array using the getBytes method in Java and prints the original String and the corresponding byte array.