Conditionally breaking for loops in Java [duplicate]

Question

I am trying to see if the multidimensional array is rectangular or not. I am new to programming and can't exactly figure out why the "break;" will not kick me out of the loop and it continues to run. Even with the array not being rectangular, I still get back true.

public static void main(String[] args) {

    int a2d[][] = {{1, 2, 3, 4, 5}, {2, 3, 4}, {1, 2, 3, 4, 5}};

    int test = a2d[0].length;

    for (int i = 0; i < a2d.length; i++) {
        for (int j = 0; j < a2d[i].length; j++) {
            if (a2d[i].length == test) {
                System.out.println("True");
            } else {
                System.out.println("False");
                break;
            }
        }
    }
}

Answer 1

In order to avoid labels, put your code into a method that returns a boolean:

boolean isRectangular(int[][] a2d) {
    int test = a2d[0].length;
    for (int i=0; i<a2d.length; i++){
        for (int j=0; j<a2d[i].length; j++){
            if (a2d[i].length != test) {
                return false;
            }
        }
    }
    return true;
}

The code can be improved to support arguments checks and whatnot, but the point is you return from the method as soon as you determine your answer.