/*
 * file: Point.java
 * Illustrates references and cloning.
 *
 * @author Chee Yap
 *     Honors Basic Algorithms, Fall 2000
 */

class Point 
	implements Cloneable // if this is missing, get runtime error
{
 public int x, y;

 Point() {
	x = 0; y = 0;
 }//Point()

 Point(int a, int b){
	x = a; y = b;
 }//Point(a,b)

 public static void main (String[] args) 
	throws Exception
 {
		int x = 1;
        	int y = x;    // value is copied
                x = 2;
                if (y == x) System.out.println("ERROR!");
                else System.out.println("RIGHT!");

                Point p = new Point(0,0);
                Point q = p;  // only reference is copied!
                p.x = 1;
                if (p == q) System.out.println("RIGHT!");
                else System.out.println("ERROR!");
                
                Point r = (Point)p.clone();    
                if (p == r) System.out.println("ERROR!");
                else System.out.println("RIGHT!");
 } //main method
} //Point Class