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

public class Jooned extends Applet implements ActionListener{
  	TextField tf=new TextField(10);
  	TextField tf2=new TextField(10);
	TextField tf3=new TextField(10);
	TextField tf4=new TextField(10);
	TextField tf5=new TextField(38);

	Button b=new Button("Paralleelsus");
	
	public Jooned(){
		add(new Label("1. koordinaat"));
		add(tf);
		add(new Label("2. koordinaat"));
		add(tf2);
		add(new Label("3. koordinaat"));
		add(tf3);
		add(new Label("4. koordinaat"));
		add(tf4);
		add(b);
		add(tf5);
		b.addActionListener(this);
	}

	public void actionPerformed(ActionEvent e){
		if(e.getSource()==b)ArvutaParaleelsus();
	}

	public void ArvutaParaleelsus(){
		double arv1,arv2,arv3,arv4,arv5,arv6,arv7,arv8;
		double k1,k2;
	      try{
		StringTokenizer stk=new StringTokenizer(tf.getText());
         	arv1=Double.parseDouble(stk.nextToken());
         	arv2=Double.parseDouble(stk.nextToken());
         	
         	StringTokenizer stk2=new StringTokenizer(tf2.getText());
         	arv3=Double.parseDouble(stk2.nextToken());
         	arv4=Double.parseDouble(stk2.nextToken());
         	
         	StringTokenizer stk3=new StringTokenizer(tf3.getText());
         	arv5=Double.parseDouble(stk3.nextToken());
         	arv6=Double.parseDouble(stk3.nextToken());
         	
         	StringTokenizer stk4=new StringTokenizer(tf4.getText());
         	arv7=Double.parseDouble(stk4.nextToken());
         	arv8=Double.parseDouble(stk4.nextToken());
   	
		if(arv3-arv1==0 || arv7-arv5==0){
			tf5.setText("Ei teki joont");
		}else{
         		k1=(arv4-arv2)/(arv3-arv1);
         		k2=(arv8-arv6)/(arv7-arv5);
         		if(k1==k2){
         			tf5.setText("Paralleelsed   "+k1+"  "+k2);
         		}else{
         			tf5.setText("Ei ole paralleelsed   "+k1+"  "+k2);
         		}
         	}
              }catch(Exception viga){
              		tf5.setText("valesti esitatud andmed");
              }
	}

	public static void main(String argumendid[]){
		Frame f=new Frame("Jooned");
		f.setSize(400, 300);
		f.add(new Jooned());
		f.setVisible(true);
		f.setLocation(300,300);
		f.addWindowListener(new Raami2kuular());
	}
}

class Raami2kuular extends WindowAdapter{
	public void windowClosing(WindowEvent e){
		System.out.println("Otsa sai");
		System.exit(0);
	}
}