From e37f342b19696eb80e35b45ad72b3b9fff9f54c3 Mon Sep 17 00:00:00 2001
From: YuWeixia <yuweixia0607@outlook.com>
Date: Sat, 28 Mar 2026 12:42:23 +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'w4/main.java'?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 w4/main.java/Circle.class    | Bin 0 -> 329 bytes
 w4/main.java/Circle.java     |  14 ++++++++++++++
 w4/main.java/Demo.class      | Bin 0 -> 513 bytes
 w4/main.java/Demo.java       |  18 ++++++++++++++++++
 w4/main.java/Rectangle.class | Bin 0 -> 338 bytes
 5 files changed, 32 insertions(+)
 create mode 100644 w4/main.java/Circle.class
 create mode 100644 w4/main.java/Circle.java
 create mode 100644 w4/main.java/Demo.class
 create mode 100644 w4/main.java/Demo.java
 create mode 100644 w4/main.java/Rectangle.class

diff --git a/w4/main.java/Circle.class b/w4/main.java/Circle.class
new file mode 100644
index 0000000000000000000000000000000000000000..3302d385544945a549fb0dd45d5eb4c50a677df6
GIT binary patch
literal 329
zcmX|6O-sW-5Pg%R*(MDsYSmtQ(KevDc&wr{cv3Gdy>Hv4U9G94iT<o2D1rxnfPYC4
zXIGJhw=?tJn~%@$_YVN4Xoqm%3V0D}@Co&&lXSR{4~pRTb*{@Zg4^wl1Jn@+gb^Bu
z2m#9mx|lAFu8=cbtqGI~#Dw@(KFV|{^LctL%Y}a)biPK}QJdg(v)-7$!D`07=9SLX
zO?5v}#Yj#}Coxy$MWLh}nGwR_sw$@HQX8`IJMY+ZM~ByO_yA($g*b9Ju3?LDo3jKi
zKOjurK*`}N#IsfJFvgbg;X%NhMQCC7&v(F8GMW~e$qU4th0VX$w`|0?$2AB0Kcs>)
A8UO$Q

literal 0
HcmV?d00001

diff --git a/w4/main.java/Circle.java b/w4/main.java/Circle.java
new file mode 100644
index 0000000..7531856
--- /dev/null
+++ b/w4/main.java/Circle.java
@@ -0,0 +1,14 @@
+package w4;
+
+public class Circle extends Shape {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.PI * radius * radius;
+    }
+}
diff --git a/w4/main.java/Demo.class b/w4/main.java/Demo.class
new file mode 100644
index 0000000000000000000000000000000000000000..92a537504d2a89d9aef9c4c38ba73f6c0f9d8772
GIT binary patch
literal 513
zcmYL`+fD*85QhJ9*o9>|#2{c)Jj((q7jowz8i`k^iJ*z`YJmnzU@@CjpUW$ZBtC!-
zW&A4|o3t~X{`1YW{rr0W0C0qgg%H9fA~vEh1Tq8n*{uy-uV1_B3}iPDFb<Wcf@6WO
zQ@%A36NtamYiG*u4yAFDC5FR-30pIg0uiU7g=qns!fQf^)7s2TYn&8jj)fHFby7|s
z>NI|`3IYjcwSD!Q6#LWWF>hfRMH4GFR<Sn2w;tR_c@wB1+j{hs7o7Ui6-YWwQhp8(
zbTb<QCIbyQ8neN(aZd`Qo63`yPos|X+iqvbNMz(HPax;qH~-(E6%gAeMZju}pZu;o
zS6Up`usyBA8rJ!YdW68Mz~H*c-7>A9jaDWQuXF^qxawmdj5xMYqOYYrMkBQKDa^Yp
z;u9pAQ>5r-vY4A7doe|xy9EX&SiG#hVQGhRm-C-o<TtP!5~MBAFR@0IpHpLGA2w?_
IJP)D#4c8h}{r~^~

literal 0
HcmV?d00001

diff --git a/w4/main.java/Demo.java b/w4/main.java/Demo.java
new file mode 100644
index 0000000..67895e5
--- /dev/null
+++ b/w4/main.java/Demo.java
@@ -0,0 +1,18 @@
+package w4.代码;
+
+import w4.Rectangle;
+import w4.Shape;
+import w4.ShapeUtil;
+import w4.Triangle;
+
+public class Demo {
+    public static void main(String[] args) {
+        Shape circle = new Circle(5.0);
+        Shape rectangle = new Rectangle(4.0, 6.0);
+        Shape triangle = new Triangle(3.0, 4.0);
+
+        ShapeUtil.printArea(circle);      // Area: 78.54
+        ShapeUtil.printArea(rectangle);   // Area: 24.00
+        ShapeUtil.printArea(triangle);    // Area: 6.00
+    }
+}
diff --git a/w4/main.java/Rectangle.class b/w4/main.java/Rectangle.class
new file mode 100644
index 0000000000000000000000000000000000000000..6295cc6c6394ad70efad308d64c86290940b1851
GIT binary patch
literal 338
zcmX|6O-sX25S-0t8`DJV*I6$%IoN|9RS<(G@nEI**Y=S{YbqhNKTCub!Gk}*A0^HU
zQWo~@?##T|{rUa+25^bP02XW?P6!vCptU^j52or>3%rY>Eb1$P-AjgTw9xhugxEqT
z2uXX;<64#Z%ur{#%<HK@GDD0)#D?WAi;0=Ky(~+H0_SEvAv?Y+N`1e08R_a#jf~#U
zb$wlF)p%usU@%`)V|`l~FxnWMKB+f_BRW`I-ePc>rlMW*(hJ)V?65n7%?^muPe^*Q
zhMy*DbUru|beX$wn0dRojS(RrvWva{4~~fl89}<Dc7@LK`$p?ENW{F)nT3NtskkwO

literal 0
HcmV?d00001