Pasted

import java.util.Comparator;
 
public class ComparatorWeight implements Comparator <Czlowiek>{
 
    @Override
    public int compare(Czlowiek cz1, Czlowiek cz2) {
        if (cz1.getWeight()<cz2.getWeight()) return -1;
        else if (cz1.getWeight()>cz2.getWeight()) return 1;
        return 0;
    }
 
}