import java.util.*;

public class Box {

    public static void main (String[] args) {
    	Integer obj;
		int num = 42;
		obj = num; // Boxing;
		int mum = obj; // Unboxing
			
		System.out.println("obj="+ obj); // Autounboxing
		System.out.println("num="+ num);
		System.out.println("mum="+ mum); // Autounboxing
		
    }
    
    
}