Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class Main {

    public static Map<String, Integer> sortByValue(Map<String, Integer> map) {
        List list = new LinkedList(map.entrySet());
        Collections.sort(list, new Comparator() {

            @Override
            public int compare(Object o1, Object o2) {
                return ((Comparable) ((Map.Entry) (o2)).getValue()).compareTo(((Map.Entry) (o1)).getValue());
            }
        });

        Map result = new LinkedHashMap();
        for (Iterator it = list.iterator(); it.hasNext();) {
            Map.Entry entry = (Map.Entry) it.next();
            result.put(entry.getKey(), entry.getValue());
        }
        return result;
    }

    public static void main(String[] args) {

        HashMap<String, Integer> map = new HashMap<String, Integer>();

        map.put("item1", 1);
        map.put("item2", 2);
        map.put("item3", 1);
        map.put("item4", 7);
        map.put("item5", 3);
        map.put("item6", 4);

        for (Map.Entry<String, Integer> entry : map.entrySet()) {
            System.out.println("Item is:" + entry.getKey() + " with value:" + entry.getValue());
        }

        Map<String, Integer> sortedMap = sortByValue(map);

        for (Map.Entry<String, Integer> entry : sortedMap.entrySet()) {
            System.out.println("Item is:" + entry.getKey() + " with value:" + entry.getValue());
        }
    }
}