Reordering a collection according to a related list of ids

Question

I have a Collection (unordered) of objects with an id property, and an (ordered) List of ids. The id list is not sorted. I\'d like to crea

Answer 1

You can:

• implement the interface Comparable in your object and then call Collections.sort(List)
• implement the interface Comparator with a new class and then call Collections.sort(List, Comparator)

With the first solution you have to modify your object, with the second one you have to create another class but you can leave your object unmodified. is your object class.