Java Map Sort sortByValue(Map map, final boolean asc)

Description

Sorts map by value (http://stackoverflow.com/a/2581754)

License

Apache License

Parameter

Parameter	Description
map	map
K	key
V	value

Return

sorted map by value

Declaration

public static <K, V extends Comparable<? super V>> LinkedHashMap<K, V> sortByValue(Map<K, V> map,
        final boolean asc) 

Method Source Code

//package com.java2s;
/*//from   ww  w  .  jav a  2 s  .  c  o m
 * Copyright 2016
 * Ubiquitous Knowledge Processing (UKP) Lab
 * Technische Universit?t Darmstadt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.*;

public class Main {
    /**
     * Sorts map by value (http://stackoverflow.com/a/2581754)
     *
     * @param map map
     * @param <K> key
     * @param <V> value
     * @return sorted map by value
     */
    public static <K, V extends Comparable<? super V>> LinkedHashMap<K, V> sortByValue(Map<K, V> map,
            final boolean asc) {
        List<Map.Entry<K, V>> list = new LinkedList<>(map.entrySet());
        Collections.sort(list, new Comparator<Map.Entry<K, V>>() {
            @Override
            public int compare(Map.Entry<K, V> o1, Map.Entry<K, V> o2) {
                if (asc) {
                    return (o1.getValue()).compareTo(o2.getValue());
                } else {
                    return (o2.getValue()).compareTo(o1.getValue());
                }
            }
        });

        LinkedHashMap<K, V> result = new LinkedHashMap<>();
        for (Map.Entry<K, V> entry : list) {
            result.put(entry.getKey(), entry.getValue());
        }
        return result;
    }
}

Related

1. sortByValue(Map map)
2. sortByValue(Map map)
3. sortByValue(Map map)
4. sortByValue(Map map)
5. sortByValue(Map map, boolean descending)
6. sortByValue(Map map)
7. sortByValue(Map map)
8. sortByValueAscending(Map map)
9. sortByValueDESC(Map map)