添加敌方坦克

src/main/java/com/example/tankbattle/Bullet.java

@@ -9,7 +9,7 @@ public class Bullet {
     private int x, y;
     private Dir dir;
 
-    public boolean live = true;
+    private boolean live = true;
 
     private TankFrame tf;
 
@@ -21,7 +21,9 @@ public class Bullet {
     }
 
     public void paint(Graphics g) {
-        if (!live) tf.bullets.remove(this);
+        if (!live) {
+            tf.bullets.remove(this);
+        }
         switch (dir) {
             case LEFT:
                 g.drawImage(ResourceMgr.bulletL, x, y, null);

src/main/java/com/example/tankbattle/Main.java

@@ -3,6 +3,12 @@ package com.example.tankbattle;
 public class Main {
     public static void main(String[] args) throws InterruptedException {
         TankFrame tf = new TankFrame();
+
+        // 初始化敌方坦克
+        for (int i = 0; i < 5; i++) {
+            tf.tanks.add(new Tank(50 + i * 80, 200, Dir.DOWN, tf));
+        }
+
         while (true) {
             Thread.sleep(50);
             tf.repaint();

src/main/java/com/example/tankbattle/Tank.java

@@ -7,8 +7,8 @@ public class Tank {
     private Dir dir = Dir.DOWN;
     private static final int SPEED = 5;
 
-    private static int WIDTH = ResourceMgr.tankD.getWidth();
-    private static int HEIGHT = ResourceMgr.tankD.getHeight();
+    public static int WIDTH = ResourceMgr.tankD.getWidth();
+    public static int HEIGHT = ResourceMgr.tankD.getHeight();
 
     private boolean moving = false;
 

src/main/java/com/example/tankbattle/TankFrame.java

@@ -9,13 +9,13 @@ import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
 
 public class TankFrame extends Frame {
 
-    Tank myTank = new Tank(200, 200, Dir.DOWN, this);
+    Tank myTank = new Tank(200, 400, Dir.DOWN, this);
 
+    List<Tank> tanks = new ArrayList<>();
     List<Bullet> bullets = new ArrayList<>();
 	public static final int GAME_WIDTH = 800,GAME_HEIGHT=600;
 
@@ -59,6 +59,10 @@ public class TankFrame extends Frame {
         for (int i = 0; i < bullets.size(); i++) {
             bullets.get(i).paint(g);
         }
+
+        for (int i = 0; i < tanks.size(); i++) {
+            tanks.get(i).paint(g);
+        }
 //        for (Iterator<Bullet> it = bullets.iterator(); it.hasNext()) {
 //            Bullet b = it.next();
 //            if (!b.live) it.remove();