diff --git a/W5/shape/Shape1.java b/W5/shape/Shape1.java
new file mode 100644
index 0000000..b6bbc21
--- /dev/null
+++ b/W5/shape/Shape1.java
@@ -0,0 +1,31 @@
+// 1. 定义父类 Shape1
+class Shape1 {
+    // 父类的 draw 方法
+    public void draw() {
+        System.out.println("绘制形状");
+    }
+}
+
+// 2. 定义子类 Circle 继承 Shape1 并重写 draw 方法
+class Circle extends Shape1 {
+    @Override
+    public void draw() {
+        System.out.println("绘制圆形");
+    }
+}
+
+// 3. 定义子类 Rectangle 继承 Shape1 并重写 draw 方法
+class Rectangle extends Shape1 {
+    @Override
+    public void draw() {
+        System.out.println("绘制矩形");
+    }
+}
+
+// 4. 定义工具类，包含 drawShape 方法
+class ShapeDrawer {
+    // 接收 Shape1 类型参数，调用 draw 方法
+    public void drawShape(Shape1 s) {
+        s.draw();
+    }
+}
\ No newline at end of file
diff --git a/W5/shape/ShapeTest.java b/W5/shape/ShapeTest.java
new file mode 100644
index 0000000..f1e97ae
--- /dev/null
+++ b/W5/shape/ShapeTest.java
@@ -0,0 +1,17 @@
+// 5. 主类，包含 main 方法进行测试
+public class ShapeTest {
+    public static void main(String[] args) {
+        // 创建对象
+        Shape1 circle = new Circle();
+        Shape1 rectangle = new Rectangle();
+        Shape1 generalShape = new Shape1();
+
+        // 创建工具类对象
+        ShapeDrawer drawer = new ShapeDrawer();
+
+        // 调用 drawShape 方法，体现多态
+        drawer.drawShape(generalShape);  // 输出：绘制形状
+        drawer.drawShape(circle);        // 输出：绘制圆形
+        drawer.drawShape(rectangle);     // 输出：绘制矩形
+    }
+}
\ No newline at end of file
diff --git a/W5/shape测试运行.png b/W5/shape测试运行.png
new file mode 100644
index 0000000..0955285
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