public class Block extends Shape {
	//Data
    private Point d1;     //top  left corner
    private Point d2;    //down right corner
    
    //Constructors
    public Block(double x1,double y1,double x2,double y2)
    											throws RuntimeException {
    	if(x1==x2 || y1==y2)
    				throw new RuntimeException("Invalid data!");
    	d1=new Point(x1,y1);
        d2=new Point(x2,y2);
	}
	
    public Block(Point d1,Point d2) throws RuntimeException {
    	this(d1.getX(),d1.getY(),d2.getX(),d2.getY());
    }
    
    //Public methods
    public double area() {
    	Point m=new Point(d1.getX(),d2.getY());
        return m.dest(d1)*m.dest(d2);
	}
	
	public double p() {
		Point m=new Point(d1.getX(),d2.getY());
        return 2*(m.dest(d1)+m.dest(d2));
	}
	
    public boolean isMember(Point p) {
    	return d1.getX()<=p.getX() && p.getX()<=d2.getX() &&
    		   d2.getY()<=p.getY() && p.getY()<=d1.getY();
	}
	
	public Object clone() {
		return new Block((Point)(d1.clone()),(Point)(d2.clone()));
	}
	
    public boolean equals(Object obj) {
    	Block b=(Block)obj;
        return d1.equals(b.d1) && d2.equals(b.d2);
	}
	
    public String toString() { return "Block="+d1.toString()+","+d2.toString(); }  
}