LRUCache

LRUCache.java 源码

package datastructure.hashtable.leetcode;

import java.util.LinkedHashMap;
import java.util.Map;

public class LRUCache extends LinkedHashMap<Integer, Integer> {

    private final int capacity;

    public LRUCache(int capacity) {
        super(capacity, 0.75F, true);
        this.capacity = capacity;
    }
    
    public int get(int key) {
        return super.getOrDefault(key, -1);
    }
    
    public void put(int key, int value) {
        super.put(key, value);
    }

    @Override
    protected boolean removeEldestEntry(Map.Entry<Integer, Integer> eldest) {
        return size() > this.capacity;
    }
}

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