如何用java编写带状矩阵

要求就是编写一个带状矩阵，代入数值之后需要运行出相应的带状矩阵

import java.util.Scanner;
 
public class test {
    public static void bandMatrix(int n, int width) {
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (Math.abs(i - j) <= width)
                    System.out.print("*");
                else
                    System.out.print("0");
                if (j != n - 1)
                    System.out.print("  ");
            }
            System.out.println();
        }
    }
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("plase input n and width:");
        while (sc.hasNextInt()) {
            int n = sc.nextInt();
            int width = sc.nextInt();
            bandMatrix(n, width);
            System.out.print("plase input n and width:");
 
        }
        sc.close();
        // bandMatrix(4, 1);
        // bandMatrix(4, 2);
    }
}