如何用常量声明一个int数组？

Question

I'm a really basic beginner at Java and I've been trying to figure out how to declare arrays. If I want to use a constant int SIZE that is set equal to 5, would it be any different from declaring a regular array?

From what I've learned, this is one way to declare an array:

int intArray[] = new int[3];

And this would give an array from 1 to 3, I think...

Answer 1

In Java, you declare constants by using the final keyword:

final int SIZE = 5;

then, you can use this constant to initialize your array:

int intArray[] = new int[SIZE];

Note:

• Indices in most programming languages start with 0 . So, to access the elements of the array, you will have to use indices starting from 0 :

   intArray[0] -> first element intArray[1] -> second element intArray[2] -> third element 

Edit:

• If you tried to access to the array using intArray[SIZE] , you will get an IndexOutOfBoundsException because you can only access with indices between 0 and SIZE - 1 . Note that in this range there are SIZE numbers of elements.