How do I encode binary data as Base64 string in Java?

import org.apache.commons.codec.binary.Base64;

import java.util.Arrays;

public class Base64Encode {
    public static void main(String[] args) {
        String hello = "Hello World";

        //
        // The encodeBase64 method take a byte[] as the paramater. The byte[] 
        // can be from a simple string like in this example or it can be from
        // an image file data.
        //
        byte[] encoded = Base64.encodeBase64(hello.getBytes());

        //
        // Print the encoded byte array
        //
        System.out.println(Arrays.toString(encoded));

        //
        // Print the encoded string
        //
        String encodedString = new String(encoded);
        System.out.println(hello + " = " + encodedString);
    }
}

Below is the output...

[83, 71, 86, 115, 98, 71, 56, 103, 86, 50, 57, 121, 98, 71, 81, 61]
Hello World = SGVsbG8gV29ybGQ=