1z0-819 Exam - Question 135

Question

Given:Which statement will refactor line 2 to use a lambda expression?

Examice · Accepted Answer

To refactor the given code to use a lambda expression, and assuming 'fruits' is not a raw type but a List<String>, the correct statement would be: fruits.sort((String d, String e) -> (e.compareTo(d)));. This correctly uses lambda syntax to implement the Comparator's compare method, comparing two strings in reverse order.

ASPushkin · Answer

there is no right answer
new Comparator()  ->  new Comparator<String>()
even if
List fruit  is a raw type list

List.of("banana", "orange", "apple", "lemon");
is an Unmodifiable List

so there is
java.lang.UnsupportedOperationException
on fruits.sort()

duydn · Answer

If 1st line is List<String> -> A will be correct answer.

Samps · Answer

A is the most correct but it gives a compilation error as a result of ';'

d7bb0b2 · Answer

no answer correct list.of is inmutable.
if that is corrected then:
A  and D are correct (correction sintax for ;)

aruni_mishra · Answer

Note: "fruits" is Raw use of parameterized class 'List',

issue with existing code:
the "new Comparator" needs to be typecast as 
new Comparator<String>(){}, to have a valid override of 
public int compare(String m, String n) {}

after if, we typecast fruit list, below will work:

-fruits.sort((m, n) -> n.compareTo(m));

-fruits.sort((String d, String e) -> (e.compareTo(d)));

-fruits.sort((a, b) -> {
            return b.compareTo(a);
        });

1z0-819 Exam - Question 135

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