Question

is it somehow possible to get a sorted List view of a List with the elements from the original List, modify the elements, for example set a property, but the original List should reflect the changes?

Background is I’m sorting two Lists, then for each equal element I’m setting a property (basically it’s the intersection) but finally I need the unsorted List with the modified elements.

kind regards,
Johannes

Answer 1

Probably the simplest thing to do is add the elements to a new list, sort that list, and when you modify the elements, the original elements will still be modified…

List<?> origA;
List<?> origB;

List<?> newA = new ArrayList<?>(origA);
List<?> newB = new ArrayList<?>(origB);

Collections.sort(newA);
Collections.sort(newB);

// do mods