How to Convert a String to Specific Character Encoding in Java?

In Java, the process of converting a String to a certain character encoding is converting the string’s character sequence to a byte array and applying the chosen character encoding.

Java Program to Convert a String to a Specific Character Encoding

Using the String class’s getBytes() function to transform a string into a byte array is the fundamental idea. The Charset class also allows you to define the character encoding. An overloaded version of the getBytes() function accepts a Charset as a parameter.

Syntax:

public byte[] getBytes()

Below is the implementation to Convert a String to a specific character encoding in Java:

Java

// Java Program to Convert a String
// Specific Character Encoding
import java.nio.charset.Charset;

// Driver Class
public class StringToEncodingExample {
      // Main Function
    public static void main(String[] args) {

        // Create a sample string
        String originalString = "Hello, Rahul!";

        // Convert the string to bytes using a specific encoding
        byte[] utf8Bytes = originalString.getBytes(Charset.forName("UTF-8"));

        // Display the original string and the encoded bytes
        System.out.println("Original String: " + originalString);
        System.out.println("UTF-8 Encoded Bytes: " + bytesToHex(utf8Bytes));
    }

    // Method to convert byte array to hexadecimal string
    private static String bytesToHex(byte[] bytes) {
        StringBuilder hexStringBuilder = new StringBuilder();

        for (byte b : bytes) {
            hexStringBuilder.append(String.format("%01X ", b));
        }
        return hexStringBuilder.toString();
    }
}

Output

Original String: Hello, Rahul!
UTF-8 Encoded Bytes: 48 65 6C 6C 6F 2C 20 52 61 68 75 6C 21 

Explaination of the above Program:

The Program is divided it in different section:

• Input String is declared
• Converting String to Byte array storing
• Converting byte to hexadecimal string and then printing.
• Printing the Final Result.