What is the size of Boolean array in Java

Question

As i know the boolean size in 16 bytes {8 as header,1 payload ,* alignment to 8}

how much does it take if the boolean variable was an array ...

my reference

Answer 1

Are you asking about Boolean object or boolean primitive? The size of the object might be 16 bytes (although probably implementation dependent) while boolean will probably consume 4 bytes (int is implicitly used).

Thus boolean[] will consume N * 4 bytes (where N is the size of the array) + some object header. Boolean[] will consume N * 16 + header (according to your assumption on Boolean size.

That being said consider writing your own array-like class and pack 32 booleans in one int (you'll have to write few bit operations manually), just like BitSet class is doing.