从map中取出最大或最小value对应的key---多种写法

package com.yuwanlong.hashing;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

/**

 * @author Yu Wanlong

 */

public class ValidAnagram {

  public static void main(String[] args) {

    Map<String, Double> map = new HashMap();

    map.put("1", 8.);

    map.put("2", 12.);

    map.put("3", 53.);

    map.put("4", 33.);

    map.put("5", 11.);

    map.put("6", 3.);

    map.put("7", 3.);

    map.put("8", 1.);

    //List<Entry<String,Integer>> list = new ArrayList(map.entrySet());

    //Collections.sort(list, (o1, o2) -> (o1.getValue() - o2.getValue()));

    String minKey = getMapMinOrMaxValueKey(map, "min");

    String maxKey = getMapMinOrMaxValueKey(map, "max");

    System.out.println(map.get(minKey));

    System.out.println(map.get(maxKey));

  }

  public static String getMapMinOrMaxValueKey(Map<String, Double> map, String choose) {

    List<Entry<String,Double>> list = new ArrayList(map.entrySet());

    Collections.sort(list, (o1, o2) -> (o1.getValue().intValue() - o2.getValue().intValue()));

    String key = "";

    if (choose.equals("min")) {

      key = list.get(0).getKey();

    } else if (choose.equals("max")) {

      key = list.get(list.size() - 1).getKey();

    }

    return key;

  }

}