W5-李鑫怡-202506050312

W5-李鑫怡-202506050312

ShapeTest.java

@@ -0,0 +1,36 @@
+class Shape {
+    public void draw() {
+        System.out.println("绘制一个图形");
+    }
+}
+
+class Circle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("绘制一个圆形 ○");
+    }
+}
+
+class Rectangle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("绘制一个矩形 ▭");
+    }
+}
+
+// 主类必须是 public，名字和文件名完全一致
+public class ShapeTest {
+    public static void drawShape(Shape s) {
+        s.draw();
+    }
+
+    public static void main(String[] args) {
+        Shape circle = new Circle();
+        Shape rectangle = new Rectangle();
+        Shape shape = new Shape();
+
+        drawShape(shape);
+        drawShape(circle);
+        drawShape(rectangle);
+    }
+}