Question

Java

Write a program ShiftNumbers.java that takes integerM as the number of both rows and columns for your 2D array.Create the same exact following 2D array Note: The borders are produced at the time of printing. You also need to shift the numbers for each row of the 2D array as displayed below: +-+-+-+-++ | 11 2131415| +-+-+-+-+-+ 1213141511| +-+-+-+-+-+ 13141511|2| +-+-+-+-+-+ 415111213 +-+-+-+-+-+ 15111213141 +-+-+-+-+-+

Here is the template

 

public class ShiftNumbers {
    public static void main(String[] args) {
        // TODO: Declare matrix shell size
        
        // TODO: Create first row
        
        // TODO: Generate remaining rows
        
        // TODO: Display matrix
    }
    
    /**
     * firstRow
     * 
     * This will generate the first row of the matrix, given the size n. The
     * elements of this row will be the values from 1 to n
     * 
     * @param   size    int   Desired size of the array
     * @return  An integer array containing the newly generated row.
     */
    public static int[] firstRow(int row){
        // TODO
        return null;
    }
    
    /**
     * nextRow
     * 
     * This will generate the following row of the matrix, given the previous row
     * 
     * @param   row     int[]   The array representing the previous row
     * @return  An integer array containing the newly generated row.
     */
    public static int[] nextRow(int[] row){
        // TODO
        return null;
    }
    
    /**
     * display
     * 
     * This will display a square 2D array (matrix) as shown in the assignment 
     * specification. The elements within the matrix are constrained such that 
     * each element is an integer between 1 and the size of the matrix.
     * 
     * @param   mat     int[][] The 2D matrix to display
     */
    public static void display(int[][] mat){
        // TODO
    }
}

Answer 1

public class ShiftNumbers {
    public static void main(String[] args) {
        // TODO: Declare matrix shell size
        int[][] matrix = new int[5][5];

        // TODO: Create first row
        matrix[0] = firstRow(5);

        // TODO: Generate remaining rows
        for (int i = 1; i < matrix.length; i++) {
            matrix[i] = nextRow(matrix[i-1]);
        }

        // TODO: Display matrix
        display(matrix);
    }

    /**
     * firstRow
     * <p>
     * This will generate the first row of the matrix, given the size n. The
     * elements of this row will be the values from 1 to n
     *
     * @param size int   Desired size of the array
     * @return An integer array containing the newly generated row.
     */
    public static int[] firstRow(int size) {
        int[] arr = new int[size];
        for (int i = 0; i < size; i++) {
            arr[i] = i+1;
        }
        return arr;
    }

    /**
     * nextRow
     * <p>
     * This will generate the following row of the matrix, given the previous row
     *
     * @param row int[]   The array representing the previous row
     * @return An integer array containing the newly generated row.
     */
    public static int[] nextRow(int[] row) {
        int[] arr = new int[row.length];
        for (int i = 0; i < row.length-1; i++) {
            arr[i] = row[i+1];
        }
        arr[row.length-1] = row[0];
        return arr;
    }

    /**
     * display
     * <p>
     * This will display a square 2D array (matrix) as shown in the assignment
     * specification. The elements within the matrix are constrained such that
     * each element is an integer between 1 and the size of the matrix.
     *
     * @param mat int[][] The 2D matrix to display
     */
    public static void display(int[][] mat) {
        System.out.print("+");
        for (int i = 0; i < mat[0].length; i++) {
            System.out.print("-+");
        }
        System.out.println();
        for (int i = 0; i < mat.length; i++) {
            for (int j = 0; j < mat[i].length; j++) {
                System.out.print("|" + mat[i][j]);
            }
            System.out.println("|");
            System.out.print("+");
            for (int j = 0; j < mat[i].length; j++) {
                System.out.print("-+");
            }
            System.out.println();
        }
    }
}