What is .intValue() in Java?

Question

What is the difference between them?

l is an arraylist of Integer type.

version 1:

int[] a = new int[l.size()];
for (in         


        

Answer 1

They are exactly the same. As other posters have mentioned, you can put either the Integer object or the int primitive into the array. In the first case, the compiler will automatically convert the Integer object into a primitive. This is called auto-boxing.