import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.math.*;

public class kolmnurk extends Applet implements MouseListener{
  
   int[] x = new int[3];
   int[] y = new int[3];
   int i=0;

   public void mousePressed(MouseEvent e){
     
     //for(int i=0; i<3; i++){
     x[i]=e.getX();
     y[i]=e.getY();
     i++;
     //}//for
     if (i==3) {
     joonistaKolmnurk();
     }
     }//mousepressed
   
   
   public void mouseReleased(MouseEvent e){}
   public void mouseEntered(MouseEvent e){}
   public void mouseExited(MouseEvent e){}
   public void mouseClicked(MouseEvent e){}
   
   public void joonistaKolmnurk(){
   double kylg1=0;
   double kylg2=0;
	double kylg3=0;
	double nurk1=0;
	double nurk2=0;
	double nurk3=0;
   int koht1x=0;
   int koht1y=0;
   int koht2x=0;
   int koht2y=0;
   int koht3x=0;
   int koht3y=0;
   
     Graphics g=this.getGraphics();
     g.setColor(Color.blue);
     g.drawLine(x[0], y[0], x[1], y[1]);
     g.drawLine(x[1], y[1], x[2], y[2]);
     g.drawLine(x[2], y[2], x[0], y[0]);
     g.setColor(Color.black);
     kylg1=Math.round( Math.sqrt( (x[1]-x[0])*(x[1]-x[0]) +  (y[1]-y[0])*(y[1]-y[0]) ));
     koht1x=(x[1]+x[0])/2;
     koht1y=(y[1]+y[0])/2;
     g.drawString(kylg1+"", koht1x, koht1y);
     kylg2=Math.round( Math.sqrt( (x[2]-x[1])*(x[2]-x[1]) +  (y[2]-y[1])*(y[2]-y[1]) ));
     koht2x=(x[2]+x[1])/2;
     koht2y=(y[2]+y[1])/2;
     g.drawString(kylg2+"", koht2x, koht2y);
	  kylg3=Math.round( Math.sqrt( (x[0]-x[2])*(x[0]-x[2]) +  (y[0]-y[2])*(y[0]-y[2]) ));
     koht3x=(x[0]+x[2])/2;
     koht3y=(y[0]+y[2])/2;
     g.drawString(kylg3+"", koht3x, koht3y);
     g.setColor(Color.green);
     nurk1=Math.round( 57.1 *Math.acos( (kylg1*kylg1+kylg2*kylg2-kylg3*kylg3)/(2*kylg1*kylg2) ) );
     g.drawString(nurk1+"", x[1], y[1]);
     nurk2=Math.round( 57.1 *Math.acos( (kylg2*kylg2+kylg3*kylg3-kylg1*kylg1)/(2*kylg3*kylg2) ) );
     g.drawString(nurk2+"", x[2], y[2]);
     nurk3=Math.round( 57.1 *Math.acos( (kylg1*kylg1+kylg3*kylg3-kylg2*kylg2)/(2*kylg3*kylg1) ) );
     g.drawString(nurk3+"", x[0], y[0]);



   }//joonistakolmnurk
   
    public void init(){
     TextField teade=new TextField("Kliki kolmnurga otspunktid!");
     add(teade);
     addMouseListener(this);
   }//init
}