完成w8作业

pair/src/Pair.java

@@ -0,0 +1,4 @@
+package PACKAGE_NAME;
+
+public class Pair {
+}

w8/.gitignore

@@ -0,0 +1,30 @@
+### 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

w8/.idea/.gitignore

@@ -0,0 +1,10 @@
+# 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/

w8/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?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>

w8/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/w8.iml" filepath="$PROJECT_DIR$/w8.iml" />
+    </modules>
+  </component>
+</project>

w8/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

w8/src/com/example/Pair.java

@@ -0,0 +1,31 @@
+package com.example;
+
+
+
+public class Pair<K,V> {
+    private K key;
+    private V value;
+    public Pair(K key,V value){
+        this.key = key;
+        this.value = value;
+    }
+    public K getKey(){
+        return key;
+    }
+    public void setKey(K key){
+        this.key = key;
+    }
+    public V getValue(){
+        return value;
+    }
+    public void setValue(V value){
+        this.value =value;
+    }
+    @Override
+    public String toString(){
+        return "Pair{"+"key="+key+",value="+value+"}";
+    }
+    public static <K,V>Pair<V,K>swap(Pair<K,V>pair){
+        return new Pair<>(pair.getValue(), pair.getKey());
+    }
+}

w8/src/com/example/PairTest.java

@@ -0,0 +1,15 @@
+package com.example;
+
+public class PairTest {
+    public static void main(String[] args){
+        Pair<String,Integer>pair1 = new Pair<>("年龄",20);
+        System.out.println("交换前：" + pair1);
+        Pair<Integer,String>swapped1 = Pair.swap(pair1);
+        System.out.println("交换后："+swapped1);
+        System.out.println("---------------------");
+        Pair<Integer,String>pair2 = new Pair<>(1001,"张三");
+        System.out.println("交换前：" + pair2);
+        Pair<String,Integer>swapped2 = Pair.swap(pair2);
+        System.out.println("交换后：" +swapped2);
+    }
+}

w8/w8.iml

@@ -0,0 +1,11 @@
+<?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>