完成W5作业

USB_homework/src/Computer.java

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+package PACKAGE_NAME;
+
+public class Computer {
+}

USB_homework/src/Keyboard.java

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+package PACKAGE_NAME;
+
+public class Keyboard {
+}

USB_homework/src/Main.java

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+package PACKAGE_NAME;
+
+public class Main {
+}

USB_homework/src/Mouse.java

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+package PACKAGE_NAME;
+
+public class Mouse {
+}

USB_homework/src/USB.java

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+package PACKAGE_NAME;
+
+public interface USB {
+}

w5/USB_homework/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

w5/USB_homework/.idea/.gitignore

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+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 已忽略包含查询文件的默认文件夹
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/

w5/USB_homework/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

w5/USB_homework/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/USB_homework.iml" filepath="$PROJECT_DIR$/USB_homework.iml" />
+    </modules>
+  </component>
+</project>

w5/USB_homework/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

w5/USB_homework/USB_homework.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

w5/USB_homework/src/Computer.java

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+public class Computer {
+    // 核心方法：插入 USB 设备
+    public void useUSB(USB usb) {
+        // 1. 打开设备
+        usb.open();
+
+        // 2. 模拟使用过程
+        System.out.println("电脑正在使用这个 USB 设备...");
+
+        // 3. 关闭设备
+        usb.close();
+
+        // 换行隔开，看着更清楚
+        System.out.println("---------------------");
+    }
+}

w5/USB_homework/src/Keyboard.java

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+public class Keyboard implements USB {
+    @Override
+    public void open() {
+        System.out.println("键盘已连接，准备输入");
+    }
+
+    @Override
+    public void close() {
+        System.out.println("键盘已断开连接，停止输入");
+    }
+}

w5/USB_homework/src/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        // 1. 建造一台电脑
+        Computer computer = new Computer();
+
+        // 2. 拿出一个鼠标（USB设备）
+        USB mouse = new Mouse();
+
+        // 3. 把鼠标插进电脑
+        computer.useUSB(mouse);
+
+        // 4. 拿出一个键盘（USB设备）
+        USB keyboard = new Keyboard();
+
+        // 5. 把键盘插进电脑
+        computer.useUSB(keyboard);
+    }
+}

w5/USB_homework/src/Mouse.java

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+public class Mouse implements USB {
+    @Override
+    public void open() {
+        System.out.println("鼠标已连接，准备工作");
+    }
+
+    @Override
+    public void close() {
+        System.out.println("鼠标已断开连接，收起工作");
+    }
+}

w5/USB_homework/src/USB.java

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+public interface USB {
+    // 打开设备
+    void open();
+
+    // 关闭设备
+    void close();
+}

w5/shape_homework/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

w5/shape_homework/.idea/.gitignore

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+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 已忽略包含查询文件的默认文件夹
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/

w5/shape_homework/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

w5/shape_homework/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/shape_homework.iml" filepath="$PROJECT_DIR$/shape_homework.iml" />
+    </modules>
+  </component>
+</project>

w5/shape_homework/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

w5/shape_homework/shape_homework.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

w5/shape_homework/src/Circle.java

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+public class Circle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("绘制圆形");
+    }
+}

w5/shape_homework/src/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        ShapeDrawer drawer = new ShapeDrawer();
+
+        Shape s1 = new Circle();
+        Shape s2 = new Rectangle();
+
+        // 调用正确的方法名
+        drawer.drawShape(s1);
+        drawer.drawShape(s2);
+    }
+}

w5/shape_homework/src/Rectangle.java

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+public class Rectangle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("绘制矩形");
+    }
+}

w5/shape_homework/src/Shape.java

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+public abstract class Shape {
+    public abstract void draw();
+}

w5/shape_homework/src/ShapeDrawer.java

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+public class ShapeDrawer {
+    // 作业要求的方法名：drawShape
+    public void drawShape(Shape s) {
+        s.draw();
+    }
+}