CODEWITHSUNDEEP
listsortingjava-8
quma
quma

Reputation: 5733

Java-8 Sort List of objects concerning inner object

I have a List of obejcts which looks like this:

List<MyObject> myObjects = ...

and MyObject has a reference to another object MyReferencedObject. I will sort List myObjects concerning a field of MyReferencedObject called sortOrder (Integer). Is there a performant possibility to do this in a performant way?

Upvotes: 1

Views: 801

Answers (1)

Grzegorz G&#243;rkiewicz
Grzegorz G&#243;rkiewicz

Reputation: 4586

You can either make it implement Comparable (especially if such comparison is not one-off and will be reused).

Then just call:

Collections.sort(myObjects);

Or define the order using a lambda expression:

Collections.sort(myObjects, (o1, o2) ->
      o1.getReferencedObject().getSortOrder()
      .compareTo(o2.getReferencedObject().getSortOrder()));

Upvotes: 1

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