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

public class liikuv2 extends Applet implements ActionListener{
	TextField tf=new TextField();
	public liikuv2(){
		add(tf);
		tf.addActionListener(this);
	}
	public void actionPerformed(ActionEvent syndmus){
			Graphics g=getGraphics();
			double a=Double.parseDouble(tf.getText());
			double t;
			final int v0=20; //m/s
			final int keskx=100;
			final int kesky=200;
			final int r=10;
			int x;
			int y=1;
			g.drawLine(0,420,800,420);
			for(t=0;kesky-y<400;t=t+0.2){
				x=(int)(Math.cos(a*Math.PI/180)*v0*t);
				y=(int)((Math.sin(a*Math.PI/180)*v0*t)-(0.98*t*t)/2);
				g.setColor(Color.black);
				g.drawOval(keskx+x,kesky-y,2*r,2*r);
				try{Thread.sleep(15);}catch(Exception e){}
				if(kesky-y<400){
					g.setColor(Color.white);
					g.drawOval(keskx+x,kesky-y,2*r,2*r);
				}
			}
	}
	public static void main(String[] arg){
		Frame f=new Frame();
		f.add(new liikuv2());
		f.setSize(200,400);
		f.setVisible(true);
		f.addWindowListener(new Raamikuular());
	}
}