打印有序2D阵列 - 单线

I am trying to write a nested for loop that will print out the values of the following code in a specific order:

我正在尝试编写一个嵌套的for循环,它将按特定顺序打印出以下代码的值:

public static void main(String[] args) {

    int[][] array2d = new int[3][5];
    for (int i = 0; i < array2d.length; i++) {
        for (int j = 0; j < array2d[0].length; j++) {
            array2d[i][j] = (i * array2d[0].length) + j + 1;
        }
    }

    for (int x = 0; x <= 4; x++) {
        for (int y = 0; y <= 2; y++) {
            System.out.println(array2d[y][x]);
        }
    }
}

}

The current array prints the way I want it, but each printout on a separate line.

当前数组以我想要的方式打印,但每个打印输出在单独的行上。

I want the output (on a single line) to be this:

我希望输出(在一行上)是这样的:

1 6 11 2 7 12 3 8 13 4 9 14 5 10 15

Thanks for the help.

谢谢您的帮助。

4 个解决方案

#1

You can use System.out.print instead:

您可以使用System.out.print:

System.out.print(array2d[y][x] + " ");

#2

Replace println with print and it should work

用打印替换println它应该工作

#3

String s = "";
for (int i = 0; i < array2d.length; i++) {
    for (int j = 0; j < array2d[i].length; j++) {
        s += array2d[i][j] + " ";
    }
}
System.out.println(s);

#4

public static void main(String[] args) {
    int[][] array2d = new int[3][5];
    for (int i = 0; i < array2d.length; i++) {
        for (int j = 0; j < array2d[0].length; j++) {
           array2d[i][j] = (i * array2d[0].length) + j + 1;
        }
    }
    StringBuilder builder = new StringBuilder();
    for (int x = 0; x <= 4; x++) {
        for (int y = 0; y <= 2; y++) {
            builder.append(array2d[y][x]);
            if(!(x == 4 && y == 2)){
                builder.append(" ");
            }
        }
    }
    System.out.println(builder.toString());
}

You basically had it right, except for changing the println to be print and formatting the string how you want. I changed it a little to show how the StringBuilder works. Whenever possible I use a StringBuilder because it is more convenient.

除了将println更改为要打印并根据需要格式化字符串之外,您基本上都是正确的。我稍微改了一下,以显示StringBuilder的工作原理。我尽可能使用StringBuilder,因为它更方便。

#1