Thread: Problem with Comparator

Hello!

I have a Treemap, and use a comparator, co, in the declaration. The goal is to write the map out in String-size-order.

        static JämförOrd co = new JämförOrd();
 
       static NavigableSet<String> na = new TreeSet<>(co);

The comparator-class I've made look like this:

public class JämförOrd implements Comparator<String> {
 
    @Override
    public int compare(String s1, String s2)
    {
        if(s1.length()< s2.length())
        {
            return -1;
        }
        else if (s1.length()>s2.length())
        {
            return 1;        
        }
        else return 0;
 
    }
}

When I don't use the comparator, the treemap is written out, but not in string-size-order. When I use the comparator, only a small part of the words are written. Why is that?

/hank

Well, the program is a Scramble-solver, which means that every combination of letters is checked in a dictionary. I guess that a set with that very comparator just have one word at every word length. Is that right?

// Hank

Thank you, Norm!