0.开篇-设计模式学习之坦克大战

目录

1、目的

2、参考

3、我的代码地址

4、初版关键点与关系图

5、主要代码

---

1、目的

通过一个项目的逐步迭代，来进行设计模式的思想学习。

2、参考

[1] 马士兵-坦克大战

[2] 慕课网-java设计模式精讲

3、我的代码地址

https://github.com/phs999/DesignPatterns

4、初版关键点与关系图

首先实现了以下几个关键点：

（1）实现一个可关闭窗口；

（2）实现方框坦克按方向键移动，不按方向键静止；

（3）实现子弹类发射子弹。

各类之间的关系图如下：

5、主要代码

package phs999.tank;

public class Main {
	 public static void main(String[] args) throws InterruptedException {
	       TankFrame tf = new TankFrame();
	  
	       while(true) {
	    	   Thread.sleep(50);
	    	   tf.repaint();
	       }
	 }
	 

}

package phs999.tank;

import java.awt.Color;
import java.awt.Frame;
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 TankFrame extends Frame {

	Tank tank = new Tank(200, 200, Dir.DOWN);
	Bullet bullet =new Bullet(300, 300, Dir.DOWN);
	static final int GAME_WIDTH=800,GAME_HEIGHT=600;
	
	public TankFrame() {
		setSize(GAME_WIDTH, GAME_HEIGHT);// 像素px
		setResizable(false);// 禁止改变大小
		setTitle("tank war");
		setVisible(true);// 设置可见性
		addKeyListener(new MykeyListener());
		// 设置关闭
		addWindowListener(new WindowAdapter() {
			/**
			 * Invoked when a window is in the process of being closed. The close operation
			 * can be overridden at this point.
			 *
			 * @param e
			 */
			@Override
			public void windowClosing(WindowEvent e) {
				// super.windowClosing(e);
				System.exit(0);
			}
		});
	}
	
	Image offScreenImage = null;

	@Override
	public void update(Graphics g) {
		if (offScreenImage == null) {
			offScreenImage = this.createImage(GAME_WIDTH, GAME_HEIGHT);
		}
		Graphics gOffScreen = offScreenImage.getGraphics();
		Color c = gOffScreen.getColor();
		gOffScreen.setColor(Color.BLACK);
		gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT);
		gOffScreen.setColor(c);
		paint(gOffScreen);
		g.drawImage(offScreenImage, 0, 0, null);
	}

	@Override
	public void paint(Graphics g) {
		tank.paint(g);
		bullet.paint(g);
		//x += 10;
	}

	class MykeyListener extends KeyAdapter {

		boolean bL=false;
		boolean bR=false;
		boolean bU=false;
		boolean bD=false;
		
		@Override
		public void keyPressed(KeyEvent e) {
			int key = e.getKeyCode();
			switch (key) {
			case KeyEvent.VK_LEFT:
				bL=true;
				break;
			case KeyEvent.VK_RIGHT:
				bR=true;
				break;
			case KeyEvent.VK_UP:
				bU=true;
				break;
			case KeyEvent.VK_DOWN:
				bD=true;
				break;
			/*case KeyEvent.VK_CONTROL:
				tank.fire();*/
			default:
				break;
			}
			// x+=200;
			// y+=10;
			// repaint();
			setMainTankDir();
			/*
			 * if (bL) { x-=10; } if (bR) { x+=10; } if (bU) { y-=10; } if (bD) { y+=10; }
			 */
		}

		private void setMainTankDir() {
			if (!bL && !bR && !bU && !bD) {
				tank.setMoving(false);
			}else {
				tank.setMoving(true);
				if (bL) {
					tank.setDir(Dir.LEFT);
				}
				if (bR) {
					tank.setDir(Dir.RIGHT);
				}
				if (bU) {
					tank.setDir(Dir.UP);
				}
				if (bD) {
					tank.setDir(Dir.DOWN);
				}
			}
		}

		@Override
		public void keyReleased(KeyEvent e) {
			int key = e.getKeyCode();
			switch (key) {
			case KeyEvent.VK_LEFT:
				bL=false;
				break;
			case KeyEvent.VK_RIGHT:
				bR=false;
				break;
			case KeyEvent.VK_UP:
				bU=false;
				break;
			case KeyEvent.VK_DOWN:
				bD=false;
				break;

			default:
				break;
			}
			setMainTankDir();
		
		}
	}
	
	
}

package phs999.tank;

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


public class Tank {
	private int x, y;
	private Dir dir = Dir.DOWN;
	private boolean moving=false;
	private static final int speed=5;
	public boolean isMoving() {
		return moving;
	}
	public void setMoving(boolean moving) {
		this.moving = moving;
	}
	public Dir getDir() {
		return dir;
	}
	public void setDir(Dir dir) {
		this.dir = dir;
	}
	public Tank(int x, int y, Dir dir) {
		super();
		this.x = x;
		this.y = y;
		this.dir = dir;
	}
	public void paint(Graphics g) {
		Color color=g.getColor();
		g.setColor(Color.YELLOW);
		g.fillRect(x, y, 50, 50);
		g.setColor(color);
		move();
	}
	private void move() {
		if (!moving) {
			return;
		}
		switch (dir) {
		case LEFT:
			x-=speed;
			break;
		case RIGHT:
			x+=speed;
			break;
		case UP:
			y-=speed;
			break;
		case DOWN:
			y+=speed;
			break;

		default:
			break;
		}
		
	}
	

}

package phs999.tank;

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

public class Bullet {
	private static final int speed=10;
	private static int WIDTH=5,HEIGHT=5;
	private int x, y;
	private Dir dir;
	public Bullet(int x, int y, Dir dir) {
		this.x = x;
		this.y = y;
		this.dir = dir;
	}
	
	public void paint(Graphics g) {
		Color color=g.getColor();
		g.setColor(Color.RED);
		g.fillOval(x, y, WIDTH,HEIGHT);
		g.setColor(color);
		move();
	}
	
	private void move() {
		switch (dir) {
		case LEFT:
			x-=speed;
			break;
		case RIGHT:
			x+=speed;
			break;
		case UP:
			y-=speed;
			break;
		case DOWN:
			y+=speed;
			break;

		default:
			break;
		}
		
	}
}

package phs999.tank;

public enum Dir {
	LEFT,RIGHT,UP,DOWN
}