From 836bff41093497e5a669c1d0b3485f86c2ed4697 Mon Sep 17 00:00:00 2001
From: Wangyanshu <2680603193@qq.com>
Date: Thu, 16 Apr 2026 14:54:26 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20'java'?=
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---
 java | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 java

diff --git a/java b/java
new file mode 100644
index 0000000..53b4594
--- /dev/null
+++ b/java
@@ -0,0 +1,48 @@
+Animal.java:
+public abstract class Animal {
+    public abstract void makeSound();
+}
+Dog.java:
+public class Dog extends Animal implements Swimmable {
+    @Override
+    public void makeSound() {
+        System.out.println("汪汪汪！");
+    }
+
+    @Override
+    public void swim() {
+        System.out.println("狗在游泳！");
+    }
+}
+Cat.java:
+public class Cat extends Animal {
+    @Override
+    public void makeSound() {
+        System.out.println("喵喵喵！");
+    }
+}
+Main.java:
+public class Main {
+    public static void main(String[] args) {
+        // 多态调用
+        Animal dog = new Dog();
+        Animal cat = new Cat();
+
+        System.out.println("狗的叫声：");
+        dog.makeSound();
+
+        System.out.println("猫的叫声：");
+        cat.makeSound();
+
+        // 测试游泳功能
+        if (dog instanceof Swimmable) {
+            ((Swimmable) dog).swim();
+        }
+
+        if (cat instanceof Swimmable) {
+            ((Swimmable) cat).swim();
+        } else {
+            System.out.println("猫不会游泳！");
+        }
+    }
+}
\ No newline at end of file