Thanks Werner, ... for having payed attention concerning a very fake problem
My implementation of Comparator was actually wrong.
I fixed the problem by changing, in compare() method of my Comparator :
if (order2>order1) {
return -1;
} else {
return 1;
}
... by :
if (order2>order1) {
return -1;
} else if (order2<order1){
return 1;
} else {
return 0;
}
Probably a problem relative to equals() consistency....
It works fine now.
Once again, Thanks
;-)
