From b7cb5899836b73947ae6fbbeaa6a629f0f5c5025 Mon Sep 17 00:00:00 2001
From: liuyixiao <3520612068@qq.com>
Date: Thu, 9 Apr 2026 08:02:30 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20'w3-1'?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 w3-1 | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 w3-1

diff --git a/w3-1 b/w3-1
new file mode 100644
index 0000000..ddaeceb
--- /dev/null
+++ b/w3-1
@@ -0,0 +1,46 @@
+// 父类 Shape
+class Shape {
+    // 父类的 draw 方法，供子类重写
+    public void draw() {
+        System.out.println("绘制通用图形");
+    }
+}
+
+// 子类 Circle 继承 Shape
+class Circle extends Shape {
+    // 重写 draw 方法，实现圆形的绘制逻辑
+    @Override
+    public void draw() {
+        System.out.println("绘制圆形 ⭕");
+    }
+}
+
+// 子类 Rectangle 继承 Shape
+class Rectangle extends Shape {
+    // 重写 draw 方法，实现矩形的绘制逻辑
+    @Override
+    public void draw() {
+        System.out.println("绘制矩形 🟦");
+    }
+}
+
+// 测试类
+public class ShapeTest {
+    // 多态核心方法：接收 Shape 类型参数，自动调用对应子类的 draw()
+    public static void drawShape(Shape s) {
+        s.draw();
+    }
+
+    public static void main(String[] args) {
+        // 1. 创建不同子类对象
+        Shape circle = new Circle();
+        Shape rectangle = new Rectangle();
+        Shape shape = new Shape();
+
+        // 2. 调用统一方法，触发多态
+        System.out.println("=== 基础题测试 ===");
+        drawShape(shape);      // 调用父类 draw()
+        drawShape(circle);     // 调用 Circle 的 draw()
+        drawShape(rectangle);  // 调用 Rectangle 的 draw()
+    }
+}
\ No newline at end of file