ممكن المساااااااااااااعده

لو سمحتم حد يحله حقي

و شكرا:(

import java.util.*;
import java.awt.geom.Point2D;



class Quadrilateral 
{
	Point2D p1,p2,p3,p4;
	private double p1p2,p1p3,p2p4,p3p4;

	public static void main(String args[])
	{
	 Point2D	pp1=new Point2D.Double(1,2);
	 Point2D	pp2 =new Point2D.Double(2,2);
	 Point2D	pp3=new Point2D.Double(1,3);
	 Point2D	pp4=new Point2D.Double(2,3);
	 Quadrilateral myshap=new Quadrilateral(pp1,pp2,pp3,pp4);
	 if(myshap.isSqare()==true)
	 	System.out.println("The shape is Square");
	 else
	 if(myshap.isRectAngel()==true)
	 	 System.out.println("The shape is Rectangle");
	 else
	 	  System.out.println("The shape is not Rectangle and not Square");

	}

	Quadrilateral(Point2D pp1,Point2D pp2,Point2D pp3,Point2D pp4)
	{
		this.p1=pp1;
		this.p2=pp2;
		this.p3=pp3;
		this.p4=pp4;

	}

	
	void setP1(Point2D p)
	{
		this.p1=p;
	}

	void setP2(Point2D p)
	{
		this.p2=p;
	}
	void setP3(Point2D p)
	{
		this.p3=p;
	}
	void setP4(Point2D p)
	{
		this.p4=p;
	}

	Point2D getP1()
	{
		return p1;
	}	

	Point2D getP2()
	{
		return p2;
	}
	Point2D getP3()
	{
		return p3;
	}
	Point2D getP4()
	{
		return p4;
	}

double to_calculate_length (Point2D pp1,Point2D pp2)
	{
		 double x=(pp2.getX()-pp1.getX())*(pp2.getX()-pp1.getX());
	 	double y=(pp2.getY()-pp1.getY())*(pp2.getY()-pp1.getY());
		return Math.sqrt(x+y);
	}

	void to_calculate_length_for_All()
	{
		p1p2=to_calculate_length (p1,p2);
		p1p3=to_calculate_length (p1,p3);
		p2p4=to_calculate_length (p2,p4);
		p3p4=to_calculate_length (p3,p4);
	}

	boolean isSqare()
	{

		boolean sq=false;
		to_calculate_length_for_All();
		if((p1p2==p1p3)&&(p1p2==p2p4)&&(p1p2==p3p4)&&(p2p4==p3p4))
	    	sq=true;

   		return sq;

	}

	boolean isRectAngel()
	{

		boolean ra=false;
		to_calculate_length_for_All();

		if((p1p2==p3p4)&&(p1p3==p2p4))
			ra=true;

  	 return ra;


	}

}//class

khwlaniهلا و شكرا على الرد

و جزاك الله الف خير(f)