学习的第二个小项目是坦克大战单机版，有机会会将它做成图片版，或者网络版的。 这个单机版经过了26个版本，最终成为一个简单的单机版，大家可以体验一下哦。 程序的主窗口 TankClient.java [code lang="java"] import java.awt.*; import java.awt.event.*; import java.util.List; import java.util.ArrayList; public class TankClient extends Frame{ public static final int GAME_WIDTH = 600; public static final int GAME_HEIGHT = 400; Tank myTank = new Tank(50, 50,true, Tank.Direction.STOP, this); List<Explode> explodes = new ArrayList<Explode>(); List<Missile> missiles = new ArrayList<Missile>(); List<Tank> tanks = new ArrayList<Tank>(); Wall w1 = new Wall(300, 200, 20, 150, this); Wall w2 = new Wall(100, 200, 20, 150, this); Blood b = new Blood(); Image offScreenImage = null; public void paint(Graphics g) { //显示相关信息 g.drawString("missiles count : " + missiles.size(),10,50); g.drawString("explodes count : " + explodes.size(),10,70); g.drawString("tanks count : " + tanks.size(),10,90); g.drawString("my life : " + myTank.getLife(),10,110); //画出子弹 for(int i=0;i<missiles.size(); i++){ Missile m = missiles.get(i); m.hitTanks(tanks); m.hitTank(myTank); m.hitWall(w1); m.hitWall(w2); m.draw(g); } //画出玩家的坦克 if(myTank.isLive()) { myTank.draw(g); myTank.eat(b); } //画出爆炸 for(int i=0;i<explodes.size();i++){ Explode e = explodes.get(i); e.draw(g); } //画出敌人坦克 if(tanks.size() <=0) { for(int i=0;i<5;i++){ tanks.add(new Tank(50 + 40*(i+1), 50, false,Tank.Direction.D, this)); } } for(int i=0;i<tanks.size();i++){ Tank t = tanks.get(i); t.hitWall(w1); t.hitWall(w2); t.hitTanks(tanks); if(t.isLive()) t.draw(g); } //画出墙 w1.draw(g); w2.draw(g); //画出血块 b.draw(g); } 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.green); gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT); gOffScreen.setColor(c); paint(gOffScreen); g.drawImage(offScreenImage, 0, 0, null); } public static void main(String[] args) { TankClient tc=new TankClient(); tc.LaunchFrame(); } public void LaunchFrame(){ // 添加10个敌方坦克 for(int i=0;i<10;i++){ tanks.add(new Tank(50 + 40*(i+1), 50, false,Tank.Direction.D, this)); } setLocation(100, 100); setSize(GAME_WIDTH,GAME_HEIGHT); setTitle("TankWar"); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); this.setResizable(false); this.setBackground(Color.green); addKeyListener(new KeyMonitor()); setVisible(true); new Thread(new PaintThread()).start(); } private class PaintThread implements Runnable { public void run() { while (true) { repaint(); try { Thread.sleep(80); } catch (InterruptedException e) { e.printStackTrace(); } } } } private class KeyMonitor extends KeyAdapter { public void keyReleased(KeyEvent e) { myTank.keyReleased(e); } public void keyPressed(KeyEvent e) { myTank.keyPressed(e); } } } [/code] 控制坦克的类Tank.java [code java="lang"] import java.awt.*; import java.awt.event.*; import java.util.*; 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 needReset = false; private int life = 100; private BloodBar bb = new BloodBar(); public void setLife(int life) { this.life = life; } public int getLife() { return life; } TankClient tc; private boolean good; private static Random r = new Random(); private boolean live = true; private int step = r.nextInt(12) + 3; public boolean isLive() { return live; } public void setLive(boolean live) { this.live = live; } public boolean isGood(){ return good; } public void setGood(boolean good){ this.good = good; } enum Direction {L, LU, U, RU, R, RD, D, LD, STOP}; private Direction dir = Direction.STOP; //炮筒方向 private Direction ptDir = Direction.D; private boolean bL=false, bU=false,bR=false,bD=false; 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){ Color c = g.getColor(); if(good) g.setColor(Color.red); else g.setColor(Color.yellow); g.fillOval(x, y, WIDTH, HEIGHT); g.setColor(c); if(this.isGood()) bb.draw(g); switch(ptDir) { case L: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT/2); break; case LU: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y); break; case U: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y); break; case RU: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y); break; case R: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT/2); break; case RD: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT); break; case D: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y + Tank.HEIGHT); break; case LD: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT); break; } move(); } void move(){ this.oldX = x; this.oldY = y; 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; } //只要坦克不是停着的，调整炮筒方向，使之与前进方向一致 if (this.dir != Direction.STOP) { this.ptDir = this.dir; } //避免坦克出界 if(x < 0) x = 0; if(y < 25 ) y = 25; if(x + Tank.WIDTH > TankClient.GAME_WIDTH) x = TankClient.GAME_WIDTH - Tank.WIDTH; if(y + Tank.HEIGHT > TankClient.GAME_HEIGHT) y = TankClient.GAME_HEIGHT - Tank.HEIGHT; //给敌方坦克设定随机方向 if(!good){ Direction[] dirs = Direction.values(); if(step == 0){ step = r.nextInt(12) + 3; int rn = r.nextInt(dirs.length); dir = dirs[rn]; } step --; //设置敌方坦克发子弹 if(r.nextInt(40) > 38) this.fire(); } } public void keyPressed(KeyEvent e){ int key = e.getKeyCode(); switch(key) { case KeyEvent.VK_LEFT : bL = true; break; case KeyEvent.VK_UP : bU = true; break; case KeyEvent.VK_RIGHT : bR = true; break; case KeyEvent.VK_DOWN : bD = true; break; } locateDirection(); } void locateDirection(){ if(bL && !bU && !bR && !bD) dir =Direction.L; else if(bL && bU && !bR && !bD) dir =Direction.LU; else if(!bL && bU && !bR && !bD) dir =Direction.U; else if(!bL && bU && bR && !bD) dir =Direction.RU; else if(!bL && !bU && bR && !bD) dir =Direction.R; else if(!bL && !bU && bR && bD) dir =Direction.RD; else if(!bL && !bU && !bR && bD) dir =Direction.D; else if(bL && !bU && !bR && bD) dir =Direction.LD; else if(!bL && !bU && !bR && !bD) dir =Direction.STOP; } public void keyReleased(KeyEvent e) { int key = e.getKeyCode(); switch(key) { case KeyEvent.VK_CONTROL : fire(); break; case KeyEvent.VK_LEFT : bL = false; break; case KeyEvent.VK_UP : bU = false; break; case KeyEvent.VK_RIGHT : bR = false; break; case KeyEvent.VK_DOWN : bD = false; break; case KeyEvent.VK_A : superFire(); break; case KeyEvent.VK_B : if(!this.live) { this.live = true; this.life = 100; } break; } } public 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, ptDir, good, this.tc); tc.missiles.add(m); return m; } public 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, dir, good, this.tc); tc.missiles.add(m); return m; } //超级子弹 private void superFire(){ Direction[] dirs = Direction.values(); for(int i=0;i<8;i++){ fire(dirs[i]); } } public Rectangle getRect() { return new Rectangle(x, y, WIDTH, HEIGHT); } private void stayOld(){ x = oldX; y = oldY; } public boolean hitWall(Wall w){ if(this.live && this.getRect().intersects(w.getRect())){ this.stayOld(); return true; } return false; } public boolean hitTanks(java.util.List<Tank> tanks){ for(int i=0;i<tanks.size();i++){ Tank t = tanks.get(i); if(this != t){ if(this.live && t.live && this.getRect().intersects(t.getRect())){ this.stayOld(); t.stayOld(); return true; } } } return false; } private class BloodBar{ public void draw(Graphics g){ Color c = g.getColor(); // 先画外面的空心框 g.setColor(Color.red); g.drawRect(x, y-10, WIDTH, 10); //画里面的实心框 int w = WIDTH * life/100; g.fillRect(x, y-10, w, 10); } } public boolean eat(Blood b){ if(this.isLive() && b.isLive() && this.getRect().intersects(b.getRect())){ this.life = 100; b.setLive(false); return true; } return false; } } [/code] 控制子弹的类Missile.java [code lang="java"] import java.awt.*; import java.util.List; public class Missile { public static final int XSPEED =10; public static final int YSPEED =10; public static final int WIDTH = 10; public static final int HEIGHT = 10; int x,y; Tank.Direction dir; private TankClient tc; private boolean live = true ; private boolean good; public boolean isLive() { return live; } public void setLive(boolean live) { this.live = live; } public Missile(int x, int y, Tank.Direction dir) { super(); this.x = x; this.y = y; this.dir = dir; } public Missile(int x, int y, Tank.Direction dir, boolean good, TankClient tc){ this(x, y, dir); this.good = good; this.tc = tc ; } public void draw(Graphics g) { if(!live) { tc.missiles.remove(this); return; } Color c = g.getColor(); if(this.good) g.setColor(Color.red); else g.setColor(Color.yellow); g.fillOval(x, y, WIDTH, HEIGHT); 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; case STOP: break; } if(x < 0 || y < 0 || x > TankClient.GAME_WIDTH || y > TankClient.GAME_HEIGHT){ live = false; tc.missiles.remove(this); } } public Rectangle getRect() { return new Rectangle(x, y, WIDTH, HEIGHT); } public boolean hitTank(Tank t){ //子弹击中目标坦克 if(this.getRect().intersects(t.getRect()) && (t.isLive()) && this.good != t.isGood()){ if(t.isGood()) { t.setLife(t.getLife() -20); if(t.getLife() <= 0) { t.setLive(false); t.setLive(false); } } this.live = false; tc.missiles.remove(this); Explode e = new Explode(x, y, tc); tc.explodes.add(e); return true; } return false; } public boolean hitTanks(List<Tank> tanks){ for(int i=0;i<tanks.size();i++){ if(hitTank(tanks.get(i))){ tanks.get(i).setLive(false); tanks.remove(i); return true; } } return false; } public boolean hitWall(Wall w){ if(this.live && this.getRect().intersects(w.getRect())){ this.live = false; return true; } return false; } } [/code] 控制爆炸的类Explode.java [code lang="java"] import java.awt.*; public class Explode { int x, y; private boolean live = true; int[] diameter = {2, 6, 13, 18, 25, 16, 10, 6}; int step = 0; private TankClient tc; public Explode(int x, int y, TankClient tc){ this.x = x; this.y = y; this.tc = tc; } public void draw(Graphics g){ if(!live) { tc.explodes.remove(this); return; } if(step == diameter.length){ live = false; step = 0; return; } Color c = g.getColor(); g.setColor(Color.white); g.fillOval(x, y, diameter[step], diameter[step]); g.setColor(c); step ++; } } [/code] 显示玩家坦克生命值的类Blood.java [code lang="java"] import java.awt.*; public class Blood { int x, y, w, h; TankClient tc; boolean live = true ; public boolean isLive() { return live; } public void setLive(boolean live) { this.live = live; } private int[][] pos = {{50, 360}, {70, 360}, {90, 360}, {110, 380}, {130, 320}, {150, 250}, {170, 200}}; int step = 0; public Blood(){ x = pos[0][0]; y = pos[0][1]; w = h = 15 ; } public void draw(Graphics g){ if(!isLive()) return; Color c = g.getColor(); g.setColor(Color.magenta); g.fillRect(x, y, w, h); g.setColor(c); move(); } private void move(){ step ++; if(step == pos.length){ step = 0; } x = pos[step][0]; y = pos[step][1]; } public Rectangle getRect(){ return new Rectangle(x, y, w, h); } } [/code] 显示障碍物的类Wall.java [code lang="java"] import java.awt.*; public class Wall { int x, y, w, h; TankClient tc; public Wall(int x, int y, int w, int h, TankClient tc){ this.x = x; this.y = y; this.w = w; this.h = h; this.tc = tc; } public void draw(Graphics g) { Color c = g.getColor(); g.setColor(Color.black); g.fillRect(x, y, w, h); g.setColor(c); } public Rectangle getRect() { return new Rectangle(x, y, w, h); } } [/code]