import java.applet.Applet;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.util.*;

public class hiirega extends Applet implements ActionListener{
        int x=0, y=0;
        int mx[]=new int[4];
        int my[]=new int[4];
        int m[]=new int[4];

        int klops=0;
        int kus=0;//mitmes on lühim väärtus massiivis
        int pikim=600;
        double ex=0, tex=0, kox=0, nex=0;
        double ey=0, tey=0, koy=0, ney=0;
        double ep=0, tep=0, kop=0, nep=0;

                public hiirega(){
        addMouseListener(new HiireKuular());
        }
     public void joonista(){
                Graphics ekraan=getGraphics();
                setBackground(Color.white);
                ekraan.setColor(Color.black);
                ekraan.drawOval(x, y, 30, 30);
   }

        public void lahimring(){
                Graphics ekraan=getGraphics();
                setBackground(Color.white);
                ekraan.setColor(Color.black);
                ekraan.fillOval(mx[kus], my[kus], 30, 30);
   }


   class HiireKuular extends MouseAdapter{
        public void mousePressed(MouseEvent e){
                if(klops<4){
                        x=e.getX();
                        mx[klops]=x;
                        y=e.getY();
                        my[klops]=y;
                        joonista();
                        System.out.println(""+mx[klops]+","+my[klops]);
                   }
                        klops++;

                        if(klops>4){
                                x=e.getX();
                        y=e.getY();
                           System.out.println("");
                           System.out.println(""+x+","+y);

                        //vektori x-koordinaadid
                           ex=x-mx[0];
                           tex=x-mx[1];
                           kox=x-mx[2];
                           nex=x-mx[3];

                           //vektori y-koordinaadid
                           ey=y-my[0];
                           tey=y-my[1];
                           koy=y-my[2];
                          ney=y-my[3];

                //vektoripikkused
                m[0]=(int)Math.sqrt(ex*ex+ey*ey);
                           m[1]=(int)Math.sqrt(tex*tex+tey*tey);
                           m[2]=(int)Math.sqrt(kox*kox+koy*koy);
                           m[3]=(int)Math.sqrt(nex*nex+ney*ney);

                                for(int i=0;i<4;i++){
                                if(m[i]<pikim){
                                pikim=m[i];
                                kus=i;
                                }
                                }
                                lahimring();
                        }
                }
   }

   public void actionPerformed(ActionEvent e){
                repaint();
        }
       public static void main(String argumendid[]){
        Frame f=new Frame();
        f.add(new hiirega());
        f.setSize(500, 500);
        f.setVisible(true);
        }
}