如何打印我的2維數組？

-1

試圖建立一個數獨板的數據結構，並且我想將它打印到初學者的控制檯。我使用了一個2維數組來表示數獨遊戲中的每個單元格，並且我在打印時遇到了一個非常困難的問題。如何打印我的2維數組？

public class Main { 

public static void main(String[] args) { 

    int[][] puzzleBoard = {}; 

    //Row 1 
    puzzleBoard[1][1] = 0; 
    puzzleBoard[2][1] = 0; 
    puzzleBoard[3][1] = 0; 
    puzzleBoard[4][1] = 0; 
    puzzleBoard[5][1] = 0; 
    puzzleBoard[6][1] = 0; 
    puzzleBoard[7][1] = 0; 
    puzzleBoard[8][1] = 0; 
    puzzleBoard[9][1] = 0; 

    //Row 2 
    puzzleBoard[1][2] = 0; 
    puzzleBoard[2][2] = 0; 
    puzzleBoard[3][2] = 0; 
    puzzleBoard[4][2] = 0; 
    puzzleBoard[5][2] = 0; 
    puzzleBoard[6][2] = 0; 
    puzzleBoard[7][2] = 0; 
    puzzleBoard[8][2] = 0; 
    puzzleBoard[9][2] = 0; 

    //Row 3 
    puzzleBoard[1][3] = 0; 
    puzzleBoard[2][3] = 0; 
    puzzleBoard[3][3] = 0; 
    puzzleBoard[4][3] = 0; 
    puzzleBoard[5][3] = 0; 
    puzzleBoard[6][3] = 0; 
    puzzleBoard[7][3] = 0; 
    puzzleBoard[8][3] = 0; 
    puzzleBoard[9][3] = 0; 

    //Row 4 
    puzzleBoard[1][4] = 0; 
    puzzleBoard[2][4] = 0; 
    puzzleBoard[3][4] = 0; 
    puzzleBoard[4][4] = 0; 
    puzzleBoard[5][4] = 0; 
    puzzleBoard[6][4] = 0; 
    puzzleBoard[7][4] = 0; 
    puzzleBoard[8][4] = 0; 
    puzzleBoard[9][4] = 0; 

    //Row 5 
    puzzleBoard[1][5] = 0; 
    puzzleBoard[2][5] = 0; 
    puzzleBoard[3][5] = 0; 
    puzzleBoard[4][5] = 0; 
    puzzleBoard[5][5] = 0; 
    puzzleBoard[6][5] = 0; 
    puzzleBoard[7][5] = 0; 
    puzzleBoard[8][5] = 0; 
    puzzleBoard[9][5] = 0; 

    //Row 6 
    puzzleBoard[1][6] = 0; 
    puzzleBoard[2][6] = 0; 
    puzzleBoard[3][6] = 0; 
    puzzleBoard[4][6] = 0; 
    puzzleBoard[5][6] = 0; 
    puzzleBoard[6][6] = 0; 
    puzzleBoard[7][6] = 0; 
    puzzleBoard[8][6] = 0; 
    puzzleBoard[9][6] = 0; 

    //Row 7 
    puzzleBoard[1][7] = 0; 
    puzzleBoard[2][7] = 0; 
    puzzleBoard[3][7] = 0; 
    puzzleBoard[4][7] = 0; 
    puzzleBoard[5][7] = 0; 
    puzzleBoard[6][7] = 0; 
    puzzleBoard[7][7] = 0; 
    puzzleBoard[8][7] = 0; 
    puzzleBoard[9][7] = 0; 

    //Row 8 
    puzzleBoard[1][8] = 0; 
    puzzleBoard[2][8] = 0; 
    puzzleBoard[3][8] = 0; 
    puzzleBoard[4][8] = 0; 
    puzzleBoard[5][8] = 0; 
    puzzleBoard[6][8] = 0; 
    puzzleBoard[7][8] = 0; 
    puzzleBoard[8][8] = 0; 
    puzzleBoard[9][8] = 0; 

    //Row 9 
    puzzleBoard[1][9] = 0; 
    puzzleBoard[2][9] = 0; 
    puzzleBoard[3][9] = 0; 
    puzzleBoard[4][9] = 0; 
    puzzleBoard[5][9] = 0; 
    puzzleBoard[6][9] = 0; 
    puzzleBoard[7][9] = 0; 
    puzzleBoard[8][9] = 0; 
    puzzleBoard[9][9] = 0; 

    int rows = 9; 
    int columns = 9; 

    int i, j; 

    for (i = 1; i < rows; i++){ 
     for(j = 1; j < columns; j++){ 
      System.out.print(puzzleBoard[i][j] + " "); 

     } 
     System.out.println(""); 
    } 
}

}

來源

2013-10-26 MattKnowles

您沒有指定大小的數組。

int[][] puzzleBoard = {};應該int[][] puzzleBoard = new int[10][10];

沒有必要用線來初始化與你的數組循環或行，如果你只用0.1

然後陣列0基地索引加油吧。所以第一個元素將在位置[0][0]和最後一個位置[9][9]。

你也可以刪除你的兩個變量rows和columns。

最後，你應該修改你的for循環，從0

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

開始學習更多關於Java數組，我建議你閱讀this。

來源

2013-10-26 15:20:28

你應該用for循環初始化數組元素！另外，請記住，Java數組是基於零的，因此最頂端的單元格將是puzzleboard[0][0]！

你還應該指定一個大小爲你的陣列 - int[][] puzzleBoard = new int[10][10];

來源

2013-10-26 15:21:43

哦，是的，正如在另一個答案中所說的，初始化計數器for循環爲0！ – 2013-10-26 15:22:58

您應該使用java.util.Arrays.deepToString()打印二維數組：

返回的指定數組的「深層內容」的字符串表示。如果數組包含其他數組作爲元素，則字符串表示形式包含其內容等等。此方法旨在將多維數組轉換爲字符串。

字符串表示形式由數組元素列表組成，方括號（「[]」）中包含。相鄰元素由分隔字符「，」（逗號後跟一個空格）。通過String.valueOf（Object）將元素轉換爲字符串，除非它們是自己的數組。

來源

2013-10-26 15:23:49

如何打印我的2維數組？

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