Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

public class Main {

    public static void main(String[] args) {
        Map<String, String> map = new HashMap<String, String>();

        map.put("KeyA", "erty");
        map.put("KeyC", "trwe");
        map.put("KeyD", "wert");
        map.put("KeyB", "fdsd");
        map.put("KeyS", "dsa");
        map.put("KeyE", "fdas");
        map.put("KeyG", "asdf");

        System.out.println(sort(map, new Comparator<String>() {
            @Override
            public int compare(String o1, String o2) {
                return o1.compareTo(o2);
            }
        }));
    }

    @SuppressWarnings("unchecked")
    public static <K, V> Map<K, V> sort(Map<K, V> in, Comparator<? super V> compare) {
        Map<K, V> result = new LinkedHashMap<K, V>();
        V[] array = (V[]) in.values().toArray();
        for (int i = 0; i < array.length; i++) {

        }
        Arrays.sort(array, compare);
        for (V item : array) {
            K key = (K) getKey(in, item);
            result.put(key, item);
        }
        return result;
    }

    public static <K, V> Object getKey(Map<K, V> in, V value) {
        Set<K> key = in.keySet();
        Iterator<K> keyIterator = key.iterator();
        while (keyIterator.hasNext()) {
            K valueObject = (K) keyIterator.next();
            if (in.get(valueObject).equals(value)) {
                return valueObject;
            }
        }
        return null;
    }
}