添加 'w8/Cache<K, V>.java'

w8/Cache<K, V>.java

@@ -0,0 +1,45 @@
+import java.util.HashMap;
+import java.util.Map;
+
+public class Cache<K, V> {
+    private final Map<K, V> cacheMap;
+
+    public Cache() {
+        cacheMap = new HashMap<>();
+    }
+
+    public void put(K key, V value) {
+        cacheMap.put(key, value);
+    }
+
+    public V get(K key) {
+        return cacheMap.get(key);
+    }
+
+    public boolean containsKey(K key) {
+        return cacheMap.containsKey(key);
+    }
+
+    public void remove(K key) {
+        cacheMap.remove(key);
+    }
+
+    public void clear() {
+        cacheMap.clear();
+    }
+
+    public int size() {
+        return cacheMap.size();
+    }
+
+    public static void main(String[] args) {
+        Cache<String, Object> myCache = new Cache<>();
+
+        myCache.put("name", "张三");
+        myCache.put("score", 99);
+
+        System.out.println("name: " + myCache.get("name"));
+        System.out.println("score: " + myCache.get("score"));
+        System.out.println("缓存总数：" + myCache.size());
+    }
+}