添加键盘监听事件，通过键盘控制方块的移动

src/com/msb/TankDemo.java

@@ -8,8 +8,14 @@ package com.msb;
  */
 public class TankDemo {
 
-    public static void main(String[] args) {
+    public static void main(String[] args) throws InterruptedException {
          TankFrame tankFrame = new 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
+         while (true) {
+             Thread.sleep(50);
+             tankFrame.repaint();
+         }
     }
 
 }

src/com/msb/TankFrame.java

@@ -1,6 +1,8 @@
 package com.msb;
 
 import java.awt.*;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 
@@ -16,10 +18,12 @@ public class TankFrame extends Frame {
     private int y = 200;
 
     public TankFrame() {
+
         setTitle("Tank war");
         setSize(800, 600);
         setResizable(true);
         setVisible(true);
+
         addWindowListener(new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
@@ -27,11 +31,31 @@ public class TankFrame extends Frame {
                 System.exit(0);
             }
         });
+
+        addKeyListener(new MyKeyListener());
+
     }
 
     @Override
     public void paint(Graphics g) {
         super.paint(g);
         g.fillRect(x, y, 50, 50);
+        x += 10;
     }
+
+    //这里使用内部内的原因是，只有TankFrame用到
+    class MyKeyListener extends KeyAdapter {
+        @Override
+        public void keyPressed(KeyEvent e) {
+            super.keyPressed(e);
+            /*x += 10;
+            repaint();*/
+        }
+
+        @Override
+        public void keyReleased(KeyEvent e) {
+            super.keyReleased(e);
+        }
+    }
+
 }