convert int to byte/ byte to int in java

/**
 * @author lautturi.com
 * Java example:convert int to byte / convert byte to int in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		int i1 = 129;
		byte b = (byte) i1;
		System.out.println(b); 
		int i2 = b & 0xFF;
		System.out.println(i2); 

	}
}

output:

-127
129