坦克大战(一期)-让敌方也打出子弹

src/com/msb/Bullet.java

@@ -14,14 +14,16 @@ public class Bullet {
     private DirEnum dir;
     public static final int WIDTH = ResourcesMgr.bulletD.getWidth();
     public static final int HEIGHT = ResourcesMgr.bulletD.getHeight();
-    public static final int SPEED = 5;
+    public static final int SPEED = 8;
     private boolean live = true;
+    private GroupEnum group = GroupEnum.BAD;
     private TankFrame tankFrame;
 
-    public Bullet(int x, int y, DirEnum dir, TankFrame tankFrame) {
+    public Bullet(int x, int y, DirEnum dir, GroupEnum group, TankFrame tankFrame) {
         this.x = x;
         this.y = y;
         this.dir = dir;
+        this.group = group;
         this.tankFrame = tankFrame;
     }
 
@@ -71,6 +73,10 @@ public class Bullet {
 
     //碰撞
     public void collide(Tank tank) {
+
+        if(this.group == tank.getGroup()) return;
+
+        //TODO 每次碰撞的时候都小new 一个 Rectangle,应该用一个Rectangle来记录子弹的位置，产生内存占用，垃圾回收器会时不时运行一下
         Rectangle bullteRec = new Rectangle(this.x, this.y, WIDTH, HEIGHT);
         Rectangle tankRec = new Rectangle(tank.getX(), tank.getY(), Tank.WIDTH, Tank.HEIGHT);
         if(bullteRec.intersects(tankRec)) {

src/com/msb/GroupEnum.java

@@ -0,0 +1,11 @@
+package com.msb;
+
+/**
+ * @Author bingor
+ * @Date 2022-10-04 17:12
+ * @Description: com.msb
+ * @Version: 1.0
+ */
+public enum GroupEnum {
+    GOOD, BAD
+}

src/com/msb/Tank.java

@@ -1,6 +1,7 @@
 package com.msb;
 
 import java.awt.*;
+import java.util.Random;
 
 /**
  * @Author bingor
@@ -12,18 +13,21 @@ public class Tank {
 
     private int x,y;
     private DirEnum dir;
-    private static final int SPEED = 10;
-    private boolean move = false;
+    private static final int SPEED = 5;
+    private boolean move = true;
     //为了解决能够在坦克中发射子弹，将创建的子弹通过坦克发射出来，那么需要在坦克类中持有游戏窗口的引用
     private TankFrame tankFrame;
     public static final int WIDTH = ResourcesMgr.tankD.getWidth();
     public static final int HEIGHT = ResourcesMgr.tankD.getHeight();
     private boolean live = true;
+    private Random random = new Random();
+    private GroupEnum group = GroupEnum.BAD;
 
-    public Tank(int x, int y, DirEnum dir, TankFrame tankFrame) {
+    public Tank(int x, int y, DirEnum dir, GroupEnum group, TankFrame tankFrame) {
         this.x = x;
         this.y = y;
         this.dir = dir;
+        this.group = group;
         this.tankFrame = tankFrame;
     }
 
@@ -64,6 +68,8 @@ public class Tank {
             default: break;
         }
 
+        if(random.nextInt(10) > 8) this.fire();
+
     }
 
     public void setMove(boolean move) {
@@ -74,7 +80,7 @@ public class Tank {
         //子弹在坦克每个方向上的中心点应该是不一样的. TODO
         int bX = this.x + WIDTH/2 - Bullet.WIDTH/2;
         int bY = this.y+HEIGHT/2-Bullet.HEIGHT/2;
-        tankFrame.bullets.add(new Bullet(bX, bY, this.dir, tankFrame));
+        tankFrame.bullets.add(new Bullet(bX, bY, this.dir, this.group, tankFrame));
     }
 
     public int getX() {
@@ -88,4 +94,8 @@ public class Tank {
     public void die() {
         this.live = false;
     }
+
+    public GroupEnum getGroup() {
+        return group;
+    }
 }

src/com/msb/TankDemo.java

@@ -13,7 +13,7 @@ public class TankDemo {
 
          //创建5个敌方坦克
         for (int i=0; i<5; i++) {
-            tankFrame.tanks.add(new Tank(100 + i*80, 100, DirEnum.DOWN, tankFrame));
+            tankFrame.tanks.add(new Tank(100 + i*80, 100, DirEnum.DOWN, GroupEnum.BAD, tankFrame));
         }
 
          //现实当中，虽然可以过按键来改变方块的坐标并且重新刷新画板来实现移动，但是敌方的坦克应该是自动在跑

src/com/msb/TankFrame.java

@@ -17,7 +17,7 @@ import java.util.Objects;
  */
 public class TankFrame extends Frame {
 
-    Tank tank = new Tank(100, 500, DirEnum.RIGHT, this);
+    Tank myTank = new Tank(100, 500, DirEnum.RIGHT, GroupEnum.GOOD, this);
 //    Bullet bullet = new Bullet(200, 200, DirEnum.DOWN);
     List<Bullet> bullets = new ArrayList<>();
     List<Tank> tanks = new ArrayList<>();   //敌方坦克
@@ -52,7 +52,7 @@ public class TankFrame extends Frame {
         g.drawString("子弹的数量：" + bullets.size(), 10, 60);
         g.drawString("敌方坦克数量：" + tanks.size(), 10, 90);
         g.setColor(color);
-        tank.paint(g);
+        myTank.paint(g);
 
         //画出敌方坦克
         for (int i=0; i<tanks.size(); i++) {
@@ -117,7 +117,7 @@ public class TankFrame extends Frame {
                 case KeyEvent.VK_RIGHT : bR = false; break;
                 case KeyEvent.VK_UP : bU = false; break;
                 case KeyEvent.VK_DOWN : bD = false; break;
-                case KeyEvent.VK_SPACE: tank.fire(); break;
+                case KeyEvent.VK_SPACE: myTank.fire(); break;
                 default: break;
             }
             setDir();
@@ -126,16 +126,16 @@ public class TankFrame extends Frame {
         private void setDir() {
             //当没有任何方向键按下的时候，那么让坦克停止
             if( !bL && !bR && !bU && !bD ) {
-                tank.setMove(false);
+                myTank.setMove(false);
             } else {
-                tank.setMove(true);
+                myTank.setMove(true);
             }
 
             //为什么不用if-else 因为有可能是一起按两个方向键，那最后拿到哪个算哪个
-            if(bL) tank.setDir(DirEnum.LEFT);
-            if(bR) tank.setDir(DirEnum.RIGHT);
-            if(bU) tank.setDir(DirEnum.UP);
-            if(bD) tank.setDir(DirEnum.DOWN);
+            if(bL) myTank.setDir(DirEnum.LEFT);
+            if(bR) myTank.setDir(DirEnum.RIGHT);
+            if(bU) myTank.setDir(DirEnum.UP);
+            if(bD) myTank.setDir(DirEnum.DOWN);
         }
     }