Using sequences.sort?

Question

I have my own javaFx class GridRow.
I want to sort an array of instances of GridRow.
For this I was using Sequence.sort() method given in API
public sort(seq: java.lang.Object[], c: java.util.Comparator)
I mention my array in the Object[] but for the comparator I am unable to figure out what to do.
If I create a class implementing comparator in java then while defining the compare(Object o1,Object o2) method I am unable to type cast o1 and o2 into my Fx node's instances as I could not find any way of accessing Fx classes inside java code.
If I create a class extending comparator in Fx then while defining the compare(Object o1,Object o2) method I am again unable to type cast o1 and o2 into my Fx node's instances.
I tried both ways I could think of:
This is pretty unexpected. Please help.

Answer 1

Try this:
import java.util.Comparator;
import javafx.util.Sequences;
var seq = ["AA", "A", "AAAA", "AAA"];
var sortSeq = Sequences.sort(seq, Comparator{
        public override function compare(obj1:Object, obj2: Object):Integer{
            obj1.toString().length() - obj2.toString().length();
println(sortSeq);