如何用空格填充字符串[][]？

Question

我正在创建一个战舰游戏应用程序来学习OOP，Java。我想显示一个“空海”供玩家参考放置他们的舰队。下面是我的游戏板课的开始：

public class Gameboard {

private int maxRow = 10;
private int maxCol = 10;
private String[][] gameboard;   // Hits and misses
private String[][] fleetboard;  // Ship locations
private boolean isHuman = false;
private ArrayList <Ship> myShips;
private ArrayList <Point> myShots;

public Gameboard(boolean isHuman) {
    this.isHuman = isHuman;

    String[][] gameboard = new String[maxRow][maxCol];
    fillArray(gameboard, " ");      

    String[][] fleetboard = new String[maxRow][maxCol];
    fillArray(fleetboard, " ");     
}

/*
 * Fills null String[][] with spaces, " "
 * String[][], String -> void
 */
protected void fillArray(String[][] board, String s) {
    // doesn't work TODO
    for (String[] row : board) {
        Arrays.fill(row, s);
    }   

    // also doesn't work TODO       
    for(int i = 0; i < maxRow; i++) {
        for(int j = 0; j < maxCol; j++) {
            board[i][j] = s;
        }
    }
}

我把这叫做主要的：

myConsole.displayBoard(userBoard.getFleet(), userBoard);

   0 1 2 3 4 5 6 7 8 9    
0 |

Answer 1

package com.company;

import java.util.Arrays;

public class Main {

    public static void main (String[]args) {

        String[][] arrayOfArraysOfSpaces = new String[3][3]; // sample size 3x3

        for (int i = 0; i < arrayOfArraysOfSpaces.length; i++) {
            Arrays.fill(arrayOfArraysOfSpaces[i], " ");
        }
    }
}

使用pre-build方法，循环遍历每个数组并使用该方法用空格填充它。