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

As you noticed, intValue is not of much use when you already know you have an Integer. However, this method is not declared in Integer, but in the general Number class. In a situation where all you know is that you have some Number, you'll realize the utility of that method.