添加图片，渲染坦克

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

@@ -0,0 +1,7 @@
+package com.example.tankbattle;
+
+public class Image {
+    public void test() {
+
+    }
+}

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

@@ -0,0 +1,23 @@
+package com.example.tankbattle;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+
+public class ResourceMgr {
+    public static BufferedImage tankL, tankU, tankR, tankD;
+
+    static {
+        try {
+            tankL = ImageIO.read(ResourceMgr.class.getClassLoader().getResourceAsStream("images/tankL.gif"));
+            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"));
+        } catch (IOException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    public ResourceMgr() {
+    }
+}

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

@@ -39,10 +39,22 @@ public class Tank {
     }
 
     public void paint(Graphics g) {
-        Color c = g.getColor();
-        g.setColor(Color.YELLOW);
-        g.fillRect(x, y, 50, 50);
-        g.setColor(c);
+        switch (dir) {
+            case LEFT:
+                g.drawImage(ResourceMgr.tankL, x, y, null);
+                break;
+            case UP:
+                g.drawImage(ResourceMgr.tankU, x, y, null);
+                break;
+            case RIGHT:
+                g.drawImage(ResourceMgr.tankR, x, y, null);
+                break;
+            case DOWN:
+                g.drawImage(ResourceMgr.tankD, x, y, null);
+                break;
+            default:
+                break;
+        }
         move();
     }
 

src/test/java/com/example/tankbattle/ImageTest.java

@@ -0,0 +1,29 @@
+package com.example.tankbattle;
+
+import org.junit.jupiter.api.Test;
+
+import javax.imageio.ImageIO;
+
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ImageTest {
+
+    @Test
+    public void test(){
+        System.out.println(ImageTest.class.getClassLoader());
+        try {
+            BufferedImage image = ImageIO.read(new File("C:/work/javaprojects/Tank_60/src/images/bulletD.gif"));
+            assertNotNull(image);
+            BufferedImage image2 = ImageIO.read(ImageTest.class.getClassLoader().getResourceAsStream("src/images" +
+                    "/bulletD.gif"));
+            assertNotNull(image2);
+        } catch (IOException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+}