Magic Square

import java.util.Scanner;
public class Magic {

    public static void main(String[] args) {
        Scanner kb = new Scanner(System.in);
        System.out.println("Enter an odd number greater than 1 and less than 17");
        int size = kb.nextInt();
        int[][] matrix = new int[size][size];
        int r=0;
        int c=size/2;
        int newR = 0;
        int newC = 0;
        matrix[r][c]=1;
        for (int i=2; i<=size*size; i++){
            newR = r-1;
            newC = c+1;
            if (newR<0){
                newR=size-1;
            }
            if (newC > (size-1)){
                newC=0;
            }
            if (matrix[newR][newC]==0){
                matrix[newR][newC]=i;
                r = newR;
                c = newC;
            }
            else {
                matrix[r+1][c]=i;
                r = r+1;
            }
        }

        for ( r=0; r<matrix.length; r++){
            for (c=0; c<matrix[r].length; c++){
                System.out.print(matrix[r][c]+ " ");
            }
            System.out.println();
        }

    }

}