Is there a concise way to create a <X> comparator based on X.getY () ordering

Question

Is there a shorter way to say this:

final Comparator<ClassA> byName = 
    (final ClassA a1, final ClassA a2) 
        -> a1.getName().compareTo( a2.getName() ));

I know getName () will never return null.

Perhaps something along these lines is using a method reference:

final Comparator<ClassA> byName = ????( ClassA::getName );

+3

WW. May 23 '17 at 12:28

1 answer

Aominè · Accepted Answer · 2017-05-23T00:32:21+0000

you can shorten it to:

final Comparator<ClassA> byName =
                Comparator.comparing(ClassA::getName);