Java 8 Lambda on Primitive Boolean

Question

How do I make the following example work?

Boolean persistence =  Arrays.asList(new boolean[]{true, false})
                             .stream()
                             .filter(b -> b)
                             .findFirst().orElse(false); 

It works just fine when I replace boolean with Boolean.

Answer 1

You cannot create a Stream of primitive booleans, this is the most efficient approach that does what you want.

boolean[] myArray = new boolean[]{ true, false };
boolean result = IntStream.range(0, myArray.length)
                          .anyMatch(index -> myArray[index]);

or you can replace the anyMatch with your approach of filter -findFirst if you prefer.