From 2d80c03f232e3c4a9710db9d63fb2ad70a6780a3 Mon Sep 17 00:00:00 2001
From: chenweicheng <3308506614@qq.com>
Date: Wed, 8 Apr 2026 16:19:33 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
 =?UTF-8?q?=20'W5'?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 W5/Main.java | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 W5/Main.java

diff --git a/W5/Main.java b/W5/Main.java
new file mode 100644
index 0000000..275a2cd
--- /dev/null
+++ b/W5/Main.java
@@ -0,0 +1,38 @@
+//TIP 要<b>运行</b>代码，请按 <shortcut actionId="Run"/> 或
+// 点击装订区域中的 <icon src="AllIcons.Actions.Execute"/> 图标。
+// 基类 Shape
+abstract class Shape {
+    public abstract void draw(); // 抽象方法，要求子类重写
+}
+
+// 子类 Circle
+class Circle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("画一个圆形");
+    }
+}
+
+// 子类 Rectangle
+class Rectangle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("画一个矩形");
+    }
+}
+
+// 测试类
+class TestPolymorphism {
+    // 接收 Shape 类型参数，调用其 draw 方法
+    public static void drawShape(Shape s) {
+        s.draw();
+    }
+
+    static void main() {
+        Shape circle = new Circle();
+        Shape rectangle = new Rectangle();
+
+        drawShape(circle);    // 输出：画一个圆形
+        drawShape(rectangle); // 输出：画一个矩形
+    }
+}
\ No newline at end of file