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lru cache java

http://www.acmerblog.com/leetcode-lru-cache-lru-5745.html

acm之家的讲解是在是好,丰富

import java.util.LinkedHashMap;public class LRUCache {     private int capacity;     private LinkedHashMap<Integer,Integer> map=null;        public LRUCache(int capacity) {        this.capacity=capacity;        map=new LinkedHashMap<Integer,Integer>(16,0.75f,true){            protected boolean removeEldestEntry(java.util.Map.Entry<Integer,Integer> eldest) {                      return size()>LRUCache.this.capacity;                            }            };    }        public int get(int key) {        if(map.get(key)==null)        {            return -1;        }        return map.get(key);            }        public void set(int key, int value) {        map.put(key,value);                    }}