From 06cfc07fe1e9de8b82b9eb33f567d6bd583127ed Mon Sep 17 00:00:00 2001
From: wangbo <1248863822@qq.com>
Date: Mon, 13 Apr 2026 20:42:02 +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'w6'?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 w6/Main.java | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 w6/Main.java

diff --git a/w6/Main.java b/w6/Main.java
new file mode 100644
index 0000000..36a9a0d
--- /dev/null
+++ b/w6/Main.java
@@ -0,0 +1,37 @@
+abstract class Animal {
+    abstract void makeSound();
+}
+
+interface Swimmable {
+    void swim();
+}
+
+class Dog extends Animal implements Swimmable {
+    public void makeSound() {
+        System.out.println("Woof!");
+    }
+
+    public void swim() {
+        System.out.println("Dog is swimming!");
+    }
+}
+
+class Cat extends Animal {
+    public void makeSound() {
+        System.out.println("Meow!");
+    }
+}
+
+public class Main {
+    public static void main(String[] args) {
+        Animal myDog = new Dog();
+        Animal myCat = new Cat();
+
+        myDog.makeSound();
+        myCat.makeSound();
+
+        if (myDog instanceof Swimmable) {
+            ((Swimmable) myDog).swim();
+        }
+    }
+}
\ No newline at end of file