import java.util.Comparator;
import java.util.ArrayList;
import java.util.Map.Entry;
import java.util.HashMap;
class CComparator implements Comparator<Entry<String, Integer>> {
public int compare(Entry<String, Integer> val1, Entry<String, Integer> val2) {
return val1.getValue().compareTo(val2.getValue());
}
}
public class MyClass {
public static void main(String args[]) {
HashMap<String, Integer> hashmap = new HashMap<>();
hashmap.put("java", 3);
hashmap.put("c++", 4);
hashmap.put("c", 1);
hashmap.put("swift", 5);
hashmap.put("python", 2);
ArrayList<Entry<String, Integer>> al = new ArrayList<>();
al.addAll(hashmap.entrySet());
al.sort(new CComparator());
for (Entry<String, Integer> e : al) {
System.out.println(e.getKey() + " : " + e.getValue());
}
}
}
/*
run:
c : 1
python : 2
java : 3
c++ : 4
swift : 5
*/
