public class Rechteck {
    public static boolean isRectangular(int[][] array) {
        boolean b = true;
        for (int i = 0; i < array.length; i++) {

            if (array[0].length == array[i].length) {

            } else b = false;

        }


        if (b == true)

        {
            for (int i = 0; i < array.length; i++) {
                for (int j = 0; j < array[i].length; j++) {
                    System.out.print(array[i][j] + ", ");


                }
                System.out.println();
            }
            return true;

        } else {
            return false;
        }
    }


    public static void main(String[] args) {
        isRectangular(new int[3][4]);

    }
}