将子弹换成图片

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

@@ -22,10 +22,23 @@ public class Bullet {
 
     public void paint(Graphics g) {
         if (!live) tf.bullets.remove(this);
-        Color c = g.getColor();
-        g.setColor(Color.RED);
-        g.fillOval(x, y, WIDTH, HEIGHT);
-        g.setColor(c);
+        switch (dir) {
+            case LEFT:
+                g.drawImage(ResourceMgr.bulletL, x, y, null);
+                break;
+            case UP:
+                g.drawImage(ResourceMgr.bulletU, x, y, null);
+                break;
+            case RIGHT:
+                g.drawImage(ResourceMgr.bulletR, x, y, null);
+                break;
+            case DOWN:
+                g.drawImage(ResourceMgr.bulletD, x, y, null);
+                break;
+            default:
+                break;
+        }
+        
         move();
     }
 

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

@@ -6,6 +6,7 @@ import java.io.IOException;
 
 public class ResourceMgr {
     public static BufferedImage tankL, tankU, tankR, tankD;
+    public static BufferedImage bulletL, bulletU,bulletR, bulletD;
 
     static {
         try {
@@ -13,6 +14,11 @@ public class ResourceMgr {
             tankU = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/tankU.gif"));
             tankR = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/tankR.gif"));
             tankD = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/tankD.gif"));
+
+            bulletL = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/bulletL.gif"));
+            bulletU = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/bulletU.gif"));
+            bulletR = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/bulletR.gif"));
+            bulletD = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/bulletD.gif"));
         } catch (IOException exception) {
             exception.printStackTrace();
         }