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

public class joon extends Applet implements ActionListener{
	TextField p1x1=new TextField("3",2);
	TextField p1y1=new TextField("4",2);
	TextField p1x2=new TextField("5",2);
	TextField p1y2=new TextField("6",2);
	TextField p2x1=new TextField("7",2);
	TextField p2y1=new TextField("8",2);
	TextField p2x2=new TextField("9",2);
	TextField p2y2=new TextField("10",2);
	Label La1=new Label("1. joone algus");
	Label La2=new Label("1. joone lõpp");
	Label La3=new Label("2. joone algus");
	Label La4=new Label("2. joone lõpp");   
	Label tulemus=new Label("                    Andme väli                    ");
	Button nupp=new Button("Joonista");
	boolean ristuvad=false;
	int x1,x2,x3,x4,y1,y2,y3,y4;
	double x=0,y=0;

	public joon(){
		add(La1);
		add(p1x1);
		add(p1y1);
		add(La2);
		add(p1x2);
		add(p1y2);
		add(La3);
		add(p2x1);
		add(p2y1);
		add(La4);
		add(p2x2);
		add(p2y2);
		add(tulemus);
		add(nupp);		
		nupp.addActionListener(this);
	}
	public void actionPerformed(ActionEvent syndmus){
		x1=Integer.parseInt(p1x1.getText());
		x2=Integer.parseInt(p1x2.getText());
		x3=Integer.parseInt(p2x1.getText());
		x4=Integer.parseInt(p2x2.getText());
		y1=Integer.parseInt(p1y1.getText());
		y2=Integer.parseInt(p1y2.getText());
		y3=Integer.parseInt(p2y1.getText());
		y4=Integer.parseInt(p2y2.getText());
		if ((x2-x1)==0 || (x4-x3)==0){
			if ((x2-x1)==(x4-x3)){
				tulemus.setText("Paralleelsed");
			}else{
				tulemus.setText("Ei ole paralleelsed");
			}
		}else if ((y2-y1)/(x2-x1)==(y4-y3)/(x4-x3)){
			tulemus.setText("Paralleelsed");
		}else{
			tulemus.setText("Ei ole paralleelsed");
		}
		for (double i=x1;i<=x2;i=i+0.01){
			if (x1==x2 && y3<(((i-x3)*(y4-y3))/(x4-x3)+y3) && (((i-x3)*(y4-y3))/(x4-x3)+y3)<y4){
				x=x1;
				y=((i-x3)*(y4-y3))/(x4-x3)+y3;
				ristuvad=true;
			}
			if (((((i-x1)*(y2-y1))/(x2-x1)+y1)-(((i-x3)*(y4-y3))/(x4-x3)+y3))<0.1 && y3<(((i-x3)*(y4-y3))/(x4-x3)+y3) && (((i-x3)*(y4-y3))/(x4-x3)+y3)<y4){
				x=i;
				y=((i-x1)*(y2-y1))/(x2-x1)+y1;
				ristuvad=true;
				break;
			}
		}

		repaint();
	}
	public void paint(Graphics g){
		g.setColor(Color.black);
		g.drawLine(200,150,200,450);
		g.drawLine(50,300,350,300);
		g.setColor(Color.green);
		g.drawLine(200+x1*10,300-y1*10,200+x2*10,300-y2*10);	
		g.setColor(Color.blue);
		g.drawLine(200+x3*10,300-y3*10,200+x4*10,300-y4*10);
		g.setColor(Color.red);
		if (ristuvad) g.fillOval(198+(int)(x*10),298-(int)(y*10),5,5);
	}

	public static void main(String[] arg){
		Frame f=new Frame();
		f.add(new joon());
		f.setSize(400,500);
		f.setVisible(true);
		f.addWindowListener(new Raamikuular());
	}
}