From def724c53bc26dcd466c272d30e1df2734576834 Mon Sep 17 00:00:00 2001
From: ZhengJiayin <13230092115@163.com>
Date: Wed, 13 May 2026 21:13:56 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=A0=E9=99=A4w9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 w9/Animal.java    | 66 -----------------------------------------------
 w9/Exception.java | 18 -------------
 w9/Java.实验    |  0
 w9/README.md      |  2 --
 4 files changed, 86 deletions(-)
 delete mode 100644 w9/Animal.java
 delete mode 100644 w9/Exception.java
 delete mode 100644 w9/Java.实验
 delete mode 100644 w9/README.md

diff --git a/w9/Animal.java b/w9/Animal.java
deleted file mode 100644
index 2df6a1b..0000000
--- a/w9/Animal.java
+++ /dev/null
@@ -1,66 +0,0 @@
-// 1. 定义Swimmable接口：包含swim()方法
-public interface Swimmable {
-    // 接口方法默认public abstract，可省略修饰符
-    void swim();
-}
-
-// 2. 定义抽象类Animal：包含抽象方法makeSound()
-public abstract class Animal {
-    // 抽象方法：没有方法体，由子类实现
-    public abstract void makeSound();
-}
-
-// 3. Dog类：继承Animal，实现Swimmable接口
-public class Dog extends Animal implements Swimmable {
-    // 实现父类抽象方法makeSound()
-    @Override
-    public void makeSound() {
-        System.out.println("狗叫：汪汪汪！");
-    }
-
-    // 实现Swimmable接口的swim()方法
-    @Override
-    public void swim() {
-        System.out.println("狗在游泳：狗刨式！");
-    }
-}
-
-// 4. Cat类：仅继承Animal，不实现Swimmable接口
-public class Cat extends Animal {
-    // 实现父类抽象方法makeSound()
-    @Override
-    public void makeSound() {
-        System.out.println("猫叫：喵喵喵！");
-    }
-}
-
-// 5. 主类：测试多态调用
-public class AnimalTest {
-    public static void main(String[] args) {
-        // 多态1：父类引用指向子类对象（Animal多态）
-        Animal dog1 = new Dog();
-        Animal cat1 = new Cat();
-
-        System.out.println("=== Animal多态调用makeSound() ===");
-        dog1.makeSound(); // 调用Dog类的makeSound()
-        cat1.makeSound(); // 调用Cat类的makeSound()
-
-        // 多态2：接口引用指向实现类对象（Swimmable多态）
-        Swimmable dog2 = new Dog();
-        System.out.println("\n=== Swimmable多态调用swim() ===");
-        dog2.swim(); // 调用Dog类的swim()
-
-        // 类型转换：将Animal类型的dog1转为Swimmable，调用swim()
-        System.out.println("\n=== 类型转换后调用swim() ===");
-        if (dog1 instanceof Swimmable) { // 安全判断：避免类型转换异常
-            Swimmable swimmableDog = (Swimmable) dog1;
-            swimmableDog.swim();
-        }
-
-        // Cat无法转换为Swimmable，会抛出异常，因此不执行
-        // if (cat1 instanceof Swimmable) {
-        //     Swimmable swimmableCat = (Swimmable) cat1;
-        //     swimmableCat.swim();
-        // }
-    }
-}
\ No newline at end of file
diff --git a/w9/Exception.java b/w9/Exception.java
deleted file mode 100644
index 1989323..0000000
--- a/w9/Exception.java
+++ /dev/null
@@ -1,18 +0,0 @@
-import java.io.BufferedReader;
-import java.io.FileReader;
-
-public class ScoreAverage {
-    public static void main(String[] args) {
-        BufferedReader br = new BufferedReader(new FileReader("scores.txt"));
-        String line;
-        int sum = 0;
-        int count = 0;
-        while ((line = br.readLine()) != null) {
-            sum += Integer.parseInt(line);
-            count++;
-        }
-        br.close();
-        double avg = (double) sum / count;
-        System.out.println("平均分：" + avg);
-    }
-}
\ No newline at end of file
diff --git a/w9/Java.实验 b/w9/Java.实验
deleted file mode 100644
index e69de29..0000000
diff --git a/w9/README.md b/w9/README.md
deleted file mode 100644
index a8687f1..0000000
--- a/w9/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# java
-