Scanner scan = new Scanner(System.in);

    System.out.print("How many rows? ");
    Integer rows = Integer.valueOf(scan.nextLine());

    System.out.print("How many columns?");
    Integer columns = Integer.valueOf(scan.nextLine());

    double two_d[][] = new double[rows][columns];

    int i, j;

    for (i = 0; i < rows; i++) {
        System.out.print("Enter " + columns + " numbers seperated by comma (" + (i + 1) + " row): ");
        String[] line = scan.nextLine().split(",");
        for (j = 0; j < columns; j++) {
            two_d[i][j] = Double.parseDouble(line[j]);
        }

    }

    for (i = 0; i < rows; i++) {
        for (j = 0; j < columns; j++) {
            System.out.print(two_d[i][j] + " ");
        }
        System.out.println();
    }

    scan.close();
    }

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        System.out.print("How many rows? ");
        int rows = Integer.valueOf(scan.nextLine());

        System.out.print("How many columns?");
        int columns = Integer.valueOf(scan.nextLine());

        double two_d[][] = new double[rows][columns];

        int i, j;

        for (i = 0; i < rows; i++) {
            System.out.print("Enter " + columns + " numbers seperated by comma (" + (i + 1) + " row): ");
            String[] line = scan.nextLine().split(",");
            double low = Double.MIN_VALUE;
            for (j = 0; j < columns; j++) {
                two_d[i][j] = Double.parseDouble(line[j]);
                if (two_d[i][j] < low) {
                    System.out.println("Error you number is to small"); //Set an error message
                    i--;
                }
                else
                  low = two_d[i][j];
            }

        }

        for (i = 0; i < rows; i++) {
            for (j = 0; j < columns; j++) {
                System.out.print(two_d[i][j] + " ");
            }
            System.out.println();
        }

        scan.close();
    }
 }