Question

First of all, Beginner here.

I’m using this code.

class MDArrays {
    public static void main(String[] args) {
        int[][] x;
        int t=2;
        x = new int[2][3];

        for(int i=0; i<=1; i++) {
            for(int j=0; i<=2; j++) {
                x[i][j] = t;
                t += 2;
                System.out.println(x[i][j]);
            }
        }
    }
}

It compiles perfectly, but when running it, after displaying 3 numbers correctly I’m getting the following error.

Exception in thread "main" java.Lang.ArrayindexOutOfBoundsException : 3 at MDArrays.main(MDArrays.java:13)

Where am I going wrong?

Answer 1

You are incrementing j while checking against i.

for(int j=0; i<=2; j++)

j will keep incrementing which will eventually give you an IndexOutOfBoundsException