Java Map Sort sortMapByValue(Map map, final boolean descending)

Description

sort Map By Value

License

Creative Commons License

Declaration

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

Method Source Code

//package com.java2s;
//License from project: Creative Commons License 

import java.util.Collections;
import java.util.Comparator;

import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class Main {
    public static <K, V extends Comparable<? super V>> LinkedHashMap<K, V> sortMapByValue(Map<K, V> map) {
        return sortMapByValue(map, false);
    }//from  w ww  . j a  v a 2s.c o  m

    public static <K, V extends Comparable<? super V>> LinkedHashMap<K, V> sortMapByValue(Map<K, V> map,
            final boolean descending) {
        List<Map.Entry<K, V>> list = new LinkedList<Map.Entry<K, V>>(map.entrySet());
        Collections.sort(list, new Comparator<Map.Entry<K, V>>() {

            public int compare(Map.Entry<K, V> o1, Map.Entry<K, V> o2) {
                int comp = (o1.getValue()).compareTo(o2.getValue());

                if (descending) {
                    comp = comp * (-1);
                }

                return comp;
            }
        });

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

Related

1. sortMapByKey(Map map)
2. sortMapByValue(Map input, final boolean desc)
3. sortMapByValue(Map map, Comparator comparator)
4. sortMapByValue(Map map, Comparator> valueComparator)
5. sortMapByValue(Map map, Comparator> comparator)
6. sortMapByValue(Map oriMap)
7. sortMapByValue(Map unsortMap, boolean highFirst)
8. sortMapByValue(Map oriMap)
9. sortMapByValue(Map oriMap, final boolean isDesc)