From 8c4079384ac0deca558df9a9572d64b2bc2f4f65 Mon Sep 17 00:00:00 2001
From: Gaoyuduo <gyd004193@qq.com>
Date: Thu, 7 May 2026 15:33:26 +0800
Subject: [PATCH] =?UTF-8?q?W4-=E9=AB=98=E9=92=B0=E9=93=8E-202506050304?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 4.1.txt                                 | Bin 0 -> 1024 bytes
 public class Circle extends Shape {.txt |  12 ++++++++++++
 public class Rectangle extends Shap.txt |  14 ++++++++++++++
 public class ShapeUtil {.txt            |   5 +++++
 public class Test {.txt                 |  11 +++++++++++
 5 files changed, 42 insertions(+)
 create mode 100644 4.1.txt
 create mode 100644 public class Circle extends Shape {.txt
 create mode 100644 public class Rectangle extends Shap.txt
 create mode 100644 public class ShapeUtil {.txt
 create mode 100644 public class Test {.txt

diff --git a/4.1.txt b/4.1.txt
new file mode 100644
index 0000000000000000000000000000000000000000..06d7405020018ddf3cacee90fd4af10487da3d20
GIT binary patch
literal 1024
ScmZQz7zLvtFd70QH3R?z00031

literal 0
HcmV?d00001

diff --git a/public class Circle extends Shape {.txt b/public class Circle extends Shape {.txt
new file mode 100644
index 0000000..584068d
--- /dev/null
+++ b/public class Circle extends Shape {.txt	
@@ -0,0 +1,12 @@
+public class Circle extends Shape {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.PI * radius * radius;
+    }
+}
\ No newline at end of file
diff --git a/public class Rectangle extends Shap.txt b/public class Rectangle extends Shap.txt
new file mode 100644
index 0000000..90cb267
--- /dev/null
+++ b/public class Rectangle extends Shap.txt	
@@ -0,0 +1,14 @@
+public class Rectangle extends Shape {
+    private double width;
+    private double height;
+
+    public Rectangle(double width, double height) {
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public double getArea() {
+        return width * height;
+    }
+}
\ No newline at end of file
diff --git a/public class ShapeUtil {.txt b/public class ShapeUtil {.txt
new file mode 100644
index 0000000..cf3fe54
--- /dev/null
+++ b/public class ShapeUtil {.txt	
@@ -0,0 +1,5 @@
+public class ShapeUtil {
+    public static void printArea(Shape shape) {
+        System.out.println("图形面积 = " + shape.getArea());
+    }
+}
\ No newline at end of file
diff --git a/public class Test {.txt b/public class Test {.txt
new file mode 100644
index 0000000..d43e8ff
--- /dev/null
+++ b/public class Test {.txt	
@@ -0,0 +1,11 @@
+public class Test {
+    public static void main(String[] args) {
+        Shape circle = new Circle(2);
+        Shape rectangle = new Rectangle(3, 4);
+        Shape triangle = new Triangle(4, 5);
+
+        ShapeUtil.printArea(circle);
+        ShapeUtil.printArea(rectangle);
+        ShapeUtil.printArea(triangle);
+    }
+}
\ No newline at end of file