From f095bf1e79647d6f2cc82d2ca3028099d2021c31 Mon Sep 17 00:00:00 2001
From: XuJingwang <XuJingwang@innoschool.org>
Date: Wed, 29 Apr 2026 15:32:12 +0800
Subject: [PATCH] =?UTF-8?q?W8-=E5=BE=90=E6=99=AF=E6=97=BA-202414010701?=
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---
 W8/Cache.java | 31 +++++++++++++++++++++++++++++++
 W8/Pair.java  | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 W8/Cache.java
 create mode 100644 W8/Pair.java

diff --git a/W8/Cache.java b/W8/Cache.java
new file mode 100644
index 0000000..955d23a
--- /dev/null
+++ b/W8/Cache.java
@@ -0,0 +1,31 @@
+import java.util.HashMap;
+import java.util.Map;
+public class Cache<K, V> {
+    // 使用 HashMap 作为底层存储容器
+    private Map<K, V> storage = new HashMap<>();
+    public void put(K key, V value) {
+        storage.put(key, value);
+    }
+    public V get(K key) {
+        return storage.get(key);
+    }
+    public void remove(K key) {
+        storage.remove(key);
+    }
+    public boolean containsKey(K key) {
+        return storage.containsKey(key);
+    }
+    public int size() {
+        return storage.size();
+    }
+    public static void main(String[] args) {
+        Cache<String, String> userCache = new Cache<>();
+        userCache.put("user:1001", "Alice");
+        userCache.put("user:1002", "Bob");
+        String user1 = userCache.get("user:1001");
+        System.out.println("获取到的用户: " + user1);
+        if (userCache.containsKey("user:1002")) {
+            System.out.println("用户 1002 在缓存中");
+        }
+    }
+}
diff --git a/W8/Pair.java b/W8/Pair.java
new file mode 100644
index 0000000..9078efd
--- /dev/null
+++ b/W8/Pair.java
@@ -0,0 +1,37 @@
+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;
+    }
+    public Pair<V, K> swap() {
+        return new Pair<>(this.value, this.key);
+    }
+    @Override
+    public String toString() {
+        return "(" + key + ", " + value + ")";
+    }
+    public static void main(String[] args) {
+        Pair<String, Integer> original = new Pair<>("Age", 25);
+        System.out.println("原始 Pair: " + original);
+
+        // 调用 swap 方法
+        Pair<Integer, String> swapped = original.swap();
+        System.out.println("交换后 Pair: " + swapped);
+    }
+}
\ No newline at end of file