From 2dc34cbbd2cafef28d4da943fbf6ca63af83576f Mon Sep 17 00:00:00 2001
From: Jiayuheng <jyhstc357000@163.com>
Date: Wed, 8 Apr 2026 18:30:35 +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/ShapeDemo.java | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 w5/ShapeDemo.java

diff --git a/w5/ShapeDemo.java b/w5/ShapeDemo.java
new file mode 100644
index 0000000..5c9c8ca
--- /dev/null
+++ b/w5/ShapeDemo.java
@@ -0,0 +1,40 @@
+class Shape {
+    public void draw() {
+        System.out.println("Drawing a shape");
+    }
+}
+
+class Circle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("Drawing a circle");
+    }
+}
+
+class Rectangle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("Drawing a rectangle");
+    }
+}
+
+public class ShapeDemo {
+    public static void drawShape(Shape s) {
+        s.draw();
+    }
+    
+    public static void main(String[] args) {
+        Shape shape = new Shape();
+        Circle circle = new Circle();
+        Rectangle rectangle = new Rectangle();
+        
+        System.out.println("Testing Shape:");
+        drawShape(shape);
+        
+        System.out.println("\nTesting Circle:");
+        drawShape(circle);
+        
+        System.out.println("\nTesting Rectangle:");
+        drawShape(rectangle);
+    }
+}
\ No newline at end of file