tank.java

一个坦克游戏程序

package com.tankwar;



import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.*;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.List;


public class Tank {

	public static final int XSPEED = 5;
	public static final int YSPEED = 5;
	
	public static final int WIDTH = 30;
	public static final int HEIGHT = 30;

	private int x, y;
	private int oldX,oldY;
	
	private boolean bR = false, bL = false, bU = false, bD = false;
	
	private boolean good;
	
	private boolean live = true;
	private int life = 100 ;
	
	BloodBar bb = new BloodBar();


	
	TankClient tc = null;

	private Direction dir = Direction.STOP;
	private Direction ptdir = Direction.D;
	
	private static Random r= new Random();
	private int step =r.nextInt(12)+3;
	
	
	private static Toolkit tk = Toolkit.getDefaultToolkit();
	
	private static Image[] tankImages =null;
	static Map<String ,Image> imgs  = new HashMap<String ,Image>();
	
	static {
		tankImages = new Image[] {
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankL.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankLU.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankLD.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankR.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankRU.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankRD.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankU.gif")),
				tk.getImage(Tank.class.getClassLoader().getResource("images/tankD.gif"))		
		};
		imgs.put("L", tankImages[0]);
		imgs.put("LU", tankImages[1]);
		imgs.put("LD", tankImages[2]);
		imgs.put("R", tankImages[3]);
		imgs.put("RU", tankImages[4]);
		imgs.put("RD", tankImages[5]);
		imgs.put("U", tankImages[6]);
		imgs.put("D", tankImages[7]);
		
	}
	

	public Tank(int x, int y ,boolean good) {
		this.x = x;
		this.y = y;
		this.oldX = x;
		this.oldY = y;
		this.good = good;
	}
	
	public Tank(int x, int y,boolean good,Direction dir, TankClient tc) {
		this(x,y,good);
		this.dir = dir;
		this.tc = tc;
		
	}

	public void draw(Graphics g) {
		
		if(!live){
			if(!good) {
				tc.tanks.remove(this);
			}
			return;
		} 
				
		if(good) {
			bb.draw(g);
		}
		
		switch (ptdir) {
		case L:
			g.drawImage(imgs.get("L"), x,y,  null);
			break;
		case LU:
			g.drawImage(imgs.get("LU"), x,y,  null);
			break;
		case LD:
			g.drawImage(imgs.get("LD"), x,y,  null);
			break;
		case R:
			g.drawImage(imgs.get("R"), x,y,  null);
			break;
		case RU:
			g.drawImage(imgs.get("RU"), x,y,  null);
			break;
		case RD:
			g.drawImage(imgs.get("RD"), x,y,  null);
			break;
		case D:
			g.drawImage(imgs.get("D"), x,y,  null);
			break;
		case U:
			g.drawImage(imgs.get("U"), x,y,  null);
			break;
		}
		
		
		move();

	}

	public void move() {
		this.oldX = x;
		this.oldY = y;

		switch (dir) {
		case L:
			x -= XSPEED;
			break;
		case LU:
			x -= XSPEED;
			y -= YSPEED;
			break;
		case LD:
			x -= XSPEED;
			y += YSPEED;
			break;
		case R:
			x += XSPEED;
			break;
		case RU:
			x += XSPEED;
			y -= YSPEED;
			break;
		case RD:
			x += XSPEED;
			y += YSPEED;
			break;
		case D:
			y += YSPEED;
			break;
		case U:
			y -= YSPEED;
			break;
		case STOP:
			break;
		}
		if(dir != Direction.STOP) {
			ptdir = this.dir;
		}

		if(x < 0) {
			x = 0 ;
		}
		if(y < 30) {
			y = 30;
		}
		if(x+Tank.WIDTH > TankClient.GAME_WIDTH)  {
			x = TankClient.GAME_WIDTH- Tank.WIDTH;
		}
		if(y + Tank.HEIGHT > TankClient.GAME_HEIGTH) {
			y = TankClient.GAME_HEIGTH- Tank.HEIGHT;
		}
	
		
		
		if(!good) {
			
			Direction[] dirs =Direction.values();
			if(step == 0) {
				step = r.nextInt(12)+3;
				int rn = r.nextInt(dirs.length);
				dir = dirs[rn];
			
			}
			step--;
			if(r.nextInt(42)>40) {
				this.fire();
			}
			
		}
	}

	public void keyPressed(KeyEvent e) {

		int key = e.getKeyCode();
		switch (key) {
		case KeyEvent.VK_F2:
			if(!this.live){
				this.live = true;
				this.life = 100;
			}
			break;
		case KeyEvent.VK_RIGHT:
			bR = true;
			break;
		case KeyEvent.VK_LEFT:
			bL = true;
			break;
		case KeyEvent.VK_DOWN:
			bD = true;
			break;
		case KeyEvent.VK_UP:
			bU = true;
			break;
		}
		location();
	}

	private Missile fire() {
		if(!live) {
			return null;
		}
		int x = this.x+Tank.WIDTH/2-Missile.WIDTH/2;
		int y = this.y+Tank.HEIGHT/2-Missile.HEIGHT/2;
		Missile m = new Missile(x,y,good,ptdir, tc);	
		tc.missiles.add(m);
		return m;
	}
	
	private Missile fire(Direction dir) {
		if(!live) {
			return null;
		}
		int x = this.x+Tank.WIDTH/2-Missile.WIDTH/2;
		int y = this.y+Tank.HEIGHT/2-Missile.HEIGHT/2;
		Missile m = new Missile(x,y,good,dir, tc);	
		tc.missiles.add(m);
		return m;
	}
	
	private void superFire() {
		Direction [] dirs = Direction.values();
		for(int i = 0 ;i < 8;i++) {
			fire(dirs[i]);
			
		}
	}
	
	

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

	public void keyReleased(KeyEvent e) {
		int key = e.getKeyCode();
		switch (key) {		
		case KeyEvent.VK_CONTROL:
			 fire();
			 break;
		case KeyEvent.VK_RIGHT:
			bR = false;
			break;
		case KeyEvent.VK_LEFT:
			bL = false;
			break;
		case KeyEvent.VK_DOWN:
			bD = false;
			break;
		case KeyEvent.VK_UP:
			bU = false;
			break;
		case KeyEvent.VK_A:
			superFire();
			break;
		}
		location();

	}
	
	public Rectangle getRect(){
		
		return new Rectangle(x,y,WIDTH,HEIGHT);
		
	}
	
	public boolean isLive() {
		return live;
	}
	
	public void setLive(boolean live) {
		this.live = live;
	}
	
	public boolean isGood() {
		return good;
	}
	
	public boolean hitWall(Wall w) {
		if(this.live && this.getRect().intersects(w.getRect())) {
			this.stay();
			return true;
		}
		
		return false;
		
	}
	
	public void stay() {
		x = this.oldX;
		y = this.oldY;
	}
	
	public boolean collidesWithTanks(List<Tank> tanks){
		for(int i = 0 ;i<tanks.size();i++) {
			Tank t = tanks.get(i);
			if(this != t) {
				if(this.live && t.isLive() && this.getRect().intersects(t.getRect())) {
					this.stay();
					t.stay();
					return true;
				}
			}
		
		}
		
		return false;
		
	}

	public int getLife() {
		return life;
	}

	public void setLife(int life) {
		this.life = life;
	}
	
	private class BloodBar {
		
		public void draw(Graphics g) {
			Color c = g.getColor();
			g.setColor(Color.RED);
			g.drawRect(x, y-10, WIDTH, 10);
			int w = WIDTH*life/100;
			g.fillRect(x, y-10, w, 10);
			g.setColor(c);
		}
	}
	
	public boolean eat(Blood b) {
		if(this.live && b.isLive()&& this.getRect().intersects(b.getRect())) {
			b.setLive(false);
			this.life = 100;
			return true;
		}
	
		return false;
		
	}
}