/*
 * SWE619 
 * ASSIGNMENT 10
 * NAN LI
 * Point3
 * 
 */
package assignment10;

import java.util.HashMap;
import java.util.Map;

public class Point3 extends Point2{
	//the z coordinate
	private int z;
	//the constructor
	public Point3(int x, int y, int z){
		super(x,y);
		this.z = z;
	}
	//Effects: return true if a object p is equal to this
	//else return false
	public boolean equals(Object p){
		System.out.println("object3 equals");
		if(p instanceof Point3)
			return equals((Point3) p);
		return super.equals(p);
	}
	//Effects: return true if a Point2 p is equal to this
	//else return false
	public boolean equals(Point2 p){
		System.out.println("Point2-3 equals");
		if(p instanceof Point3) 
			return equals((Point3) p);
		return super.equals(p);
	}
	//Effects: return true if a Point3 p is equal to this
	//else return false
	public boolean equals(Point3 p){
		System.out.println("Point3 equals");
		if(p == null || z != p.z)
			return false;
		return super.equals(p);
	}
	//Effects: return a hash code for this
	public int hashCode(){
		int result = super.hashCode();
		result = 31 * result + z;
		return result;
	}

}