Sprting a HashSet by propert

I turned it into a list...

But cant get the Collection.Sort good

this is the code:

package nl.wag.webarm.utils;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.Iterator;

import java.util.List;

import java.util.Set;

import nl.wag.webarm.model.FactuurOnderdeel;

public class FactuurUtils {

public static void createFactuur (Set onderdelen){

if (onderdelen != null){

List onderdelenlijst = new ArrayList();

Iterator it = onderdelen.iterator();

while ( it.hasNext()){

FactuurOnderdeel fo = (FactuurOnderdeel) it.next();

onderdelenlijst.add(fo);

}

Collections.sort(onderdelenlijst,new OdComparator()); // this is where eclipse shows the warnings.. warnings are on the bottom of this post..

}

}

public class OdComparator implements Comparator{

public int compare(Object arg0, Object arg1) {

String s1 = ((FactuurOnderdeel) arg0).getId();

String s2 = ((FactuurOnderdeel) arg1).getId();

return s1.compareTo(s2);

}

}

}

And this is the warings eclipse gives:

Multiple markers at this line

- Type safety: The expression of type FactuurUtils.OdComparator needs unchecked

conversion to conform to Comparator<? super T>

- No enclosing instance of type FactuurUtils is accessible. Must qualify the allocation with

an enclosing instance of type FactuurUtils (e.g. x.new A() where x is an instance of FactuurUtils).

- Type safety: Unchecked invocation sort(List, Comparator) of the generic method sort

(List<T>, Comparator<? super T>) of type Collections

- Type safety: The expression of type List needs unchecked conversion to conform to

List<T>

S1lv3ra at 2007-7-12 19:48:32 >