Hello Izak, could it be that you just have a bug in your compareTo method. This method is called when you use a TreeMap, but not when you use an ArrayList. Try looking at line 196 of QuotationProduct. Your problem should be on that line.
Ciao, Stijn On Mon, 2006-02-06 at 10:54 +0200, Izak Wessels wrote: > java.lang.NullPointerException > Stack Trace: > > * > net.pokkie.jupiter.model.quotationproduct.QuotationProduct.compareTo( > QuotationProduct.java:196) > * java.util.TreeMap.compare(TreeMap.java:1093) > * java.util.TreeMap.put(TreeMap.java:465) > * java.util.TreeSet.add(TreeSet.java:210) --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
