package methods;

/**
 * Whenever we use default implementation of clone method we get shallow copy of 
 * object means it creates new instance and copies all the field of object to that 
 * new instance and returns it as object type, we need to explicitly cast it back
 * to our original object. This is shallow copy of the object.
 * 
 */

import java.util.ArrayList;

class ShallowCopy1 {
	int x, y;
}

class ShallowCopy2 implements Cloneable {
	int a, b;
	ShallowCopy1 c = new ShallowCopy1(); 
	public Object clone() throws CloneNotSupportedException {
		return super.clone();
	}
}
public class ShallowCopy {

	public static void main(String[] args) throws CloneNotSupportedException {
		ShallowCopy2 t1 = new ShallowCopy2();
		t1.a = 10;
		t1.b = 20;
		t1.c.x = 30;
		t1.c.y = 40;
		
		ShallowCopy2 t2 = (ShallowCopy2)t1.clone();
		
		t2.a = 100;
		t2.c.x = 300;
		
		System.out.println(t1.a + " " + t1.b + " " + t1.c.x + " " + t1.c.y);
		System.out.println(t2.a + " "  + t2.b + " " + t2.c.x + " " +t2.c.y);
	}
}