value ascending not descendin

import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;
 
public class Solution {
	public static void main(String[] args) {
		HashMap<String, Integer> map = new HashMap<String, Integer>();
		map.put("a", 10);
		map.put("b", 30);
		map.put("c", 50);
		map.put("d", 40);
		map.put("e", 20);
		System.out.println(map);
 
		Map sortedMap = sortByValue(map);
		System.out.println(sortedMap);
	}
 
	public static Map sortByValue(Map unsortedMap) {
		Map sortedMap = new TreeMap(new ValueComparator(unsortedMap));
		sortedMap.putAll(unsortedMap);
		return sortedMap;
	}
 
}
 
class ValueComparator implements Comparator {
 
	Map map;
 
	public ValueComparator(Map map) {
		this.map = map;
	}
 
	public int compare(Object keyA, Object keyB) {
		Comparable valueA = (Comparable) map.get(keyA);
		Comparable valueB = (Comparable) map.get(keyB);
		return valueB.compareTo(valueA);
	}
}

Select allOpen in new window

i was trying above example got below output
{a=10, b=30, c=50, d=40, e=20}
{c=50, d=40, b=30, e=20, a=10}


hot to get values in ascending order not descending order as above. please advise