Java/w8/Cache.java

import java.util.HashMap;
import java.util.Map;
public class Cache<K,V>{
    private Map<K,V> cache;
    public Cache(){
        this.cache=new HashMap<>();
    }
    //存储键值对到缓存
    public void put(K key,V value){
        cache.put(key,value);
    }
    //根据键获取值
    public V get(K key){
        return cache.get(key);
    }
    //检查某个缓存是否包含某个键
    public boolean containsKey(K key){
        return cache.containsKey(key);
    }
    //移除指定键的值
    public V remove(K key){
        return cache.remove(key);
    }
    //清空缓存
    public void clear(){
        cache.clear();
    }
    //获取缓存大小
    public int size(){
        return cache.size();
    }
    //检查缓存是否为空
    public boolean isEmpty(){
        return cache.isEmpty();
    }
    @Override
    public String toString(){
        return "Cache"+cache.toString();
    }
    public static void main (String []args){
        Cache<String,Integer> ageCache=new Cache<>();
        ageCache.put("张三",14);
        ageCache.put("李四",13);
        ageCache.put("王五",16);
        System.out.println("年龄缓存："+ageCache);
        System.out.println("获取张三年龄"+ageCache.get("张三"));
        System.out.println("缓存大小:"+ageCache.size());
        System.out.println("是否存在赵强的信息:"+ageCache.containsKey("赵强"));
    }
}