From e119a9798cd8ad7a1f6112738144937cc28482e9 Mon Sep 17 00:00:00 2001
From: bingor_yhj <bingor19890207@163.com>
Date: Fri, 30 Sep 2022 14:45:50 +0800
Subject: [PATCH] =?UTF-8?q?=E5=9D=A6=E5=85=8B=E5=A4=A7=E6=88=98(=E4=B8=80?=
 =?UTF-8?q?=E6=9C=9F)-=E5=A2=9E=E5=8A=A0=E5=AD=90=E5=BC=B9=E7=B1=BB?=
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---
 src/com/msb/Bullet.java    | 44 ++++++++++++++++++++++++++++++++++++++
 src/com/msb/TankFrame.java |  2 ++
 2 files changed, 46 insertions(+)
 create mode 100644 src/com/msb/Bullet.java

diff --git a/src/com/msb/Bullet.java b/src/com/msb/Bullet.java
new file mode 100644
index 0000000..9e98e77
--- /dev/null
+++ b/src/com/msb/Bullet.java
@@ -0,0 +1,44 @@
+package com.msb;
+
+import java.awt.*;
+
+/**
+ * @Author bingor
+ * @Date 2022-09-30 14:33
+ * @Description: 子弹类
+ * @Version: 1.0
+ */
+public class Bullet extends Frame {
+
+    private int x, y;
+    private DirEnum dir;
+    public static final int WIDTH = 8;
+    public static final int HEIGHT = 8;
+    public static final int SPEED = 5;
+
+    public Bullet(int x, int y, DirEnum dir) {
+        this.x = x;
+        this.y = y;
+        this.dir = dir;
+    }
+
+    public void paint(Graphics g) {
+        Color color = g.getColor();
+        g.setColor(Color.RED);
+        g.fillOval(x, y, WIDTH, HEIGHT);
+        g.setColor(color);  //还原画笔原来的颜色
+        moving();
+    }
+
+    public void moving() {
+
+        switch (dir) {
+            case UP: y -= SPEED; break;
+            case DOWN: y += SPEED; break;
+            case LEFT: x -= SPEED; break;
+            case RIGHT: x += SPEED; break;
+            default: break;
+        }
+
+    }
+}
diff --git a/src/com/msb/TankFrame.java b/src/com/msb/TankFrame.java
index 271aeae..3260ece 100644
--- a/src/com/msb/TankFrame.java
+++ b/src/com/msb/TankFrame.java
@@ -15,6 +15,7 @@ import java.awt.event.WindowEvent;
 public class TankFrame extends Frame {
 
     Tank tank = new Tank(200, 200, DirEnum.RIGHT);
+    Bullet bullet = new Bullet(200, 200, DirEnum.DOWN);
 
     public TankFrame() {
 
@@ -39,6 +40,7 @@ public class TankFrame extends Frame {
     public void paint(Graphics g) {
         super.paint(g);
         tank.paint(g);
+        bullet.paint(g);
     }
 
     //这里使用内部内的原因是，只有TankFrame用到