TankWar0.7

package com.diaodiao;

import java.awt.Frame;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TankClient extends Frame {

	public static final int GAME_WIDTH = 800;
	public static final int GAME_HEIGHT = 600;

	private Tank myTank = new Tank(50, 50);
	private Missile m = new Missile(50, 60, Tank.Direction.R);

	Image offScreenImage = null;

	@Override
	public void paint(Graphics g) {
		m.draw(g);
		myTank.drawTank(g);
	}

	public void update(Graphics g) {
		if(offScreenImage == null) {
			offScreenImage = this.createImage(GAME_WIDTH, GAME_HEIGHT);
		}
		Graphics gOffScreen = offScreenImage.getGraphics(); //图片的画笔
		Color c = gOffScreen.getColor();
		gOffScreen.setColor(Color.GREEN);
		gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT);
		gOffScreen.setColor(c);
		paint(gOffScreen);
		g.drawImage(offScreenImage, 0, 0, null);
	}

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public void lauchFrame() {
		setLocation(300, 100);
		setSize(GAME_WIDTH, GAME_HEIGHT);
		setTitle("TankWar");
		setResizable(false);
		setBackground(Color.GREEN);
		this.addWindowListener(new WindowAdapter(){

			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}			

		});
		this.addKeyListener(new KeyMonitor());
		setVisible(true);
		new Thread(new PaintThread()).start();
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		TankClient tc = new TankClient();
		tc.lauchFrame();
	}

	private class PaintThread implements Runnable {
		@Override
		public void run() {
			while(true) {
				repaint();
				try {
					Thread.sleep(40);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}			
		}		
	}

	private class KeyMonitor extends KeyAdapter {		
		@Override
		public void keyReleased(KeyEvent e) {
			myTank.keyReleased(e);
		}

		@Override
		public void keyPressed(KeyEvent e) {
			myTank.keyPressed(e);
		}
	}
}

package com.diaodiao;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;

public class Tank {

	public static final int XSPEED = 5;
	public static final int YSPEED = 5;

	private int x, y;

	private boolean bL = false, bU = false, bR = false, bD = false;
	enum Direction {L, LU, U, RU, R, RD, D, LD, STOP};

	private Direction dir = Direction.STOP;

	public Tank() {}

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

	public int getX() {
		return x;
	}

	public void setX(int x) {
		this.x = x;
	}

	public int getY() {
		return y;
	}

	public void setY(int y) {
		this.y = y;
	}

	public void drawTank(Graphics g) {
		Color c = g.getColor();
		g.setColor(Color.RED);
		g.fillOval(x, y, 30, 30);
		g.setColor(c);
		move();
	}

	void move() {
		switch(dir) {
		case L:
			x -= XSPEED;
			break;
		case LU:
			x -= XSPEED;
			y -= YSPEED;
			break;
		case U:
			y -= YSPEED;
			break;
		case RU:
			x += XSPEED;
			y -= YSPEED;
			break;
		case R:
			x += XSPEED;
			break;
		case RD:
			x += XSPEED;
			y += YSPEED;
			break;
		case D:
			y += YSPEED;
			break;
		case LD:
			x -= XSPEED;
			y += YSPEED;
			break;
		case STOP:
			break;
		}
	}

	public void keyPressed(KeyEvent e) {
		int key = e.getKeyCode();
		if(key == KeyEvent.VK_RIGHT) {
			bR = true; 
		}else if(key == KeyEvent.VK_DOWN) {
			bD = true;
		}else if(key == KeyEvent.VK_LEFT) {
			bL = true;
		}else if(key == KeyEvent.VK_UP) {
			bU = true;
		}
		locateDirection();
	}

	void locateDirection() {
		if(bL && !bR && !bU && !bD) {
			dir = Direction.L;
		}else if(bL && !bR && bU && !bD) {
			dir = Direction.LU;
		}else if(!bL && !bR && bU && !bD) {
			dir = Direction.U;
		}else if(!bL && bR && bU && !bD) {
			dir = Direction.RU;
		}else if(!bL && bR && !bU && !bD) {
			dir = Direction.R;
		}else if(!bL && bR && !bU && bD) {
			dir = Direction.RD;
		}else if(!bL && !bR && !bU && bD) {
			dir = Direction.D;
		}else if(bL && !bR && !bU && bD) {
			dir = Direction.LD;
		}else {
			dir = Direction.STOP;
		}
	}

	public void keyReleased(KeyEvent e) {
		int key = e.getKeyCode();
		if(key == KeyEvent.VK_RIGHT) {
			bR = false; 
		}else if(key == KeyEvent.VK_DOWN) {
			bD = false;
		}else if(key == KeyEvent.VK_LEFT) {
			bL = false;
		}else if(key == KeyEvent.VK_UP) {
			bU = false;
		}
		locateDirection();
	}

}

package com.diaodiao;

import java.awt.Color;
import java.awt.Graphics;

public class Missile {  //子弹类

	public static final int XSPEED = 10; //每一次移动的位移量X
	public static final int YSPEED = 10; //每一次移动的位移量Y

	private int x,y;  //子弹坐标
	Tank.Direction dir; //子弹飞行的方向

	public Missile(int x, int y, Tank.Direction dir) {
		this.x = x;
		this.y = y;
		this.dir = dir;
	}

	public void draw(Graphics g) {
		Color c = g.getColor();
		g.setColor(Color.BLACK);
		g.fillOval(x, y, 10, 10);
		g.setColor(c);

		move();
	}

	private void move() {
		switch(dir) {
		case L:
			x -= XSPEED;
			break;
		case LU:
			x -= XSPEED;
			y -= YSPEED;
			break;
		case U:
			y -= YSPEED;
			break;
		case RU:
			x += XSPEED;
			y -= YSPEED;
			break;
		case R:
			x += XSPEED;
			break;
		case RD:
			x += XSPEED;
			y += YSPEED;
			break;
		case D:
			y += YSPEED;
			break;
		case LD:
			x -= XSPEED;
			y += YSPEED;
			break;
		}

	}

}