Exam 1z0-819 topic 1 question 22 discussion

- var i1 = 1, i2 = 2; - ERROR - var isn't allowed in a compound declaration - can not mix var with explicit types (var s1, String s2) - local variables declared with var are non-final by default. However, the final modifier can be added to var declarations:

Good definitions

B AND E: BiPredicate<Integer, Integer> test = (final Integer x, var y) -> (x.equals(y)); => BAD MIX TYPES BiPredicate<Integer, Integer> test2 = (var x, final var y) -> (x.equals(y)); => OK BiPredicate<Integer, Integer> test3 = (Integer x, final var y) -> (x.equals(y)); => MIX BiPredicate<Integer, Integer> test4 = (final var x, y) -> (x.equals(y)); => Y NOT TYPE BiPredicate<Integer, Integer> test5 = (Integer x, final Integer y) -> (x.equals(y)); => OK

Tested: B and E.

BE are correct

B and E, as var parameters cannot be mixed with other (typed) parameters

B&E are correct

BiPredicate<Integer, Integer> test = (var x, final var y) -> (x.equals(y)); BiPredicate<Integer, Integer> test2 = (Integer x, final Integer y) -> (x.equals(y));

B and E are correct

Correct answer is BE