Error in this program for int array in two different situations behaves differently

Question

Error in this program for int array Can anyone explain why these two cases behave differently?

class MainOutOfMemoryError {
    /*
    case1:doesn't give me any error
    static final int s = 1024 * 1024 * 1024 * 1024 * 1024;

    public static void main(String[] args) {
        // we cant declare local variables as static
        int[] i = new int[s];
        System.out.println(s);
    }
    */

    // case2:gives error    
    static final int SIZE = 2 * 1024 * 1024;
    public static void main(String[] a) {
        int[] i = new int[SIZE];
        System.out.println(SIZE);
    }
}

Answer 1

From your comment

in Case1,it is showing sopln(s) prints 0 but in case 2 it prints actual Size ,WHY ?

In your first case, integer overflow happened and the result of s is 0

static final int s = 1024 * 1024 * 1024 * 1024 * 1024;

// s value is 0 because of overflow 

That is kind of writing

int[] i = new int[0];   

Where as in second case the result s is 2097152 a valid integer and you run out of memory while allocation of memory for integers in array.

So you are trying to do

int[] i = new int[2097152];  

Which try to allocate the memory 67108864 bits.

I'm kind of clues here that, what makes you out of memory since that bits are equals to 8.388608MB