import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class UFOGame02 {
	class Bullet {
		int x, y;

		Bullet(int x, int y){
			this.x = x;
			this.y = y;
		}
	}

	private JFrame frame = new JFrame("�t�e�n�Q�[��");
	private JPanel pane = (JPanel)frame.getContentPane();
	private int w = 400, h = 400;
	private int ux = 0, udx = 2;
	private int bx = 170;
	private LinkedList<Bullet> bullets = new LinkedList<Bullet>();
	private Canvas canvas = new Canvas(){
		@Override
		public void update(Graphics g){
			paint(g);
		}
		
		@Override
		public void paint(Graphics g){
			Rectangle rec = g.getClipBounds();
			w = rec.width;
			h = rec.height;
			Image img = createImage(w, h);
			Graphics ofg = img.getGraphics();

			ofg.setColor(Color.RED);
			ofg.fillOval(ux, 10, 80, 30);
			ofg.setColor(Color.WHITE);
			ofg.drawString("U F O", ux + 25, 30);
			ofg.setColor(Color.BLUE);
			ofg.fillRect(bx - 30, h - 50, 60, 20);
			ofg.fillPolygon(new int[]{bx, bx - 15, bx + 15}, new int[]{h - 65, h - 45, h - 45}, 3);
			Iterator<Bullet> it = bullets.iterator();
			while(it.hasNext()){
				Bullet b = it.next();
				ofg.fillRect(b.x, b.y, 4, 10);
				b.y -= 3;
				if(b.y < 10) it.remove();
			}
			g.drawImage(img, 0, 0, this);

			try{Thread.sleep(20);}catch(Exception ex){}
			if((udx > 0 && ux >= w - 80) || (udx < 0 && ux <= 0)){
				udx = -udx;
			}
			ux += udx;
			repaint();
		}
	};
	
	public UFOGame02(){
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		canvas.setBackground(Color.WHITE);
		canvas.setSize(w, h);
		canvas.addMouseMotionListener(new MouseMotionAdapter(){
			@Override
			public void mouseMoved(MouseEvent ev){
				bx = ev.getX();
				if(bx > w - 30) bx = w - 30;
				else if(bx < 30) bx = 30;
			}
		});
		canvas.addMouseListener(new MouseAdapter(){
			@Override
			public void mouseClicked(MouseEvent ev){
				bullets.add(new Bullet(bx - 2, h - 75));
			}
		});
		pane.add(canvas);
		frame.pack();
		frame.setVisible(true);
	}
	
	public static void main(String[] args) {
		G106WinLF.set();
		new UFOGame02();
	}
}