用 Java 打印二维数组

Question

I'm trying print a 10x10 grid, I don't need any particular symbols, just the 10x10 format. There's actually a lot more to the whole program but right now I'm stuck on this. I really just want to print *'s for a simple Pacman game. I'm not good at programming at all, but I have to pass so I can graduate next semester. Here is what I have so far;

public class Pacman {

    public static void main(String[] args) {

        int columns = 0;
        int rows = 0;

        int[][] grid = new int[rows][columns];

        for (int i = 0; i < grid.length; i++){
            for (int j = 0; j < grid.length; j++){
            System.out.println(grid[i][j] + " ");
            }
            System.out.println();
        }

    }

}

I don't have errors in syntax or compiling, but nothing actually prints.

Answer 1

    public static void main(String[] args) {

        int columns = 10;
        int rows = 10;

        int[][] grid = new int[rows][columns];

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

}

Answer 2

int columns = 10;
int rows = 10;

int[][] grid = new int[rows][columns];



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

That will print out a 10x10 with every number in the array being 0