diff --git a/w/Cache.java b/w/Cache.java
new file mode 100644
index 0000000..18fa2f9
--- /dev/null
+++ b/w/Cache.java
@@ -0,0 +1,51 @@
+package w8;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Cache<K, V> {
+    private final Map<K, V> cache = new HashMap<>();
+
+    // 存入缓存
+    public void put(K key, V value) {
+        cache.put(key, value);
+    }
+
+    // 从缓存获取
+    public V get(K key) {
+        return cache.get(key);
+    }
+
+    // 移除缓存
+    public V remove(K key) {
+        return cache.remove(key);
+    }
+
+    // 清空缓存
+    public void clear() {
+        cache.clear();
+    }
+
+    // 判断是否包含key
+    public boolean containsKey(K key) {
+        return cache.containsKey(key);
+    }
+
+    // 获取缓存大小
+    public int size() {
+        return cache.size();
+    }
+
+    // 测试
+    public static void main(String[] args) {
+        Cache<String, Integer> studentScore = new Cache<>();
+        studentScore.put("张三", 90);
+        studentScore.put("李四", 85);
+
+        System.out.println("张三的分数：" + studentScore.get("张三"));
+        System.out.println("缓存大小：" + studentScore.size());
+
+        studentScore.remove("李四");
+        System.out.println("移除李四后，缓存是否包含李四？" + studentScore.containsKey("李四"));
+    }
+}
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