坦克大战（一期）-设计模式-添加4块墙

src/main/java/com/msb/model/GameModel.java

@@ -5,6 +5,7 @@ package com.msb.model;/**
  * @Version: 1.0
  */
 
+import com.msb.TankFrame;
 import com.msb.base.PropertyMgr;
 import com.msb.chain.ColliderChain;
 import com.msb.enums.DirEnum;
@@ -59,6 +60,13 @@ public class GameModel {
 //            tankFrame.tanks.add(new Tank(100 + i*80, 100, DirEnum.valueOf(random.nextInt(30)%4), GroupEnum.BAD, tankFrame));
             gameObjects.add(new Tank(100 + i*120, 100, DirEnum.DOWN, GroupEnum.BAD));
         }
+
+        //上面两块
+        add(new Wall(TankFrame.GAME_WIDTH/4*1-200/2, TankFrame.GAME_HEIGHT/4*1-50/2, 200, 50));
+        add(new Wall(TankFrame.GAME_WIDTH/4*3-200/2, TankFrame.GAME_HEIGHT/4*1-50/2, 200, 50));
+        //下面两块
+        add(new Wall(TankFrame.GAME_WIDTH/4*1-50/2, TankFrame.GAME_HEIGHT/4*3-200/2, 50, 200));
+        add(new Wall(TankFrame.GAME_WIDTH/4*3-50/2, TankFrame.GAME_HEIGHT/4*3-200/2, 50, 200));
     }
 
     public void paint(Graphics g) {

src/main/java/com/msb/model/Wall.java

@@ -31,7 +31,10 @@ public class Wall extends GameObject {
 
     @Override
     public void paint(Graphics g) {
-        GameModel.getInstance().paint(g);
+        Color color = g.getColor();
+        g.setColor(Color.LIGHT_GRAY);
+        g.fillRect(x, y, width, height);
+        g.setColor(color);
     }
 
     public int getWidth() {