java string to byte array/ convert byte array to string

/**
 * @author lautturi.com 
 * Java example: string to byte array / byte array to string in java
 */

import java.nio.charset.StandardCharsets;
import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		
		String str = "hello java";
		byte[] bytes = str.getBytes();
		String s = new String(bytes, StandardCharsets.UTF_8);
		System.out.println(Arrays.toString(bytes));
		System.out.println(s);
	}
}

output:

[104, 101, 108, 108, 111, 32, 106, 97, 118, 97]
hello java