java - Java：打印格式，一行有两个数组，长度不同

Question

我想在我的控制台上打印一个漂亮的表格，其中包含我给出的两个数组的内容。两个数组都是 ArrayList，可能有不同的长度。此外，两个 ArrayList 内部都是长度为 3 的数组。

我现在面临的问题是我希望将每个 ArrayLists 的两个值都放在一行中。例如：

EAN   STOCK   CAPACITY  |  EAN   STOCK   CAPACITY
 10       3          3  |   10       2         4
 11       1          6  |   11       4         5
 12       5          7  |   12       6         9
 13       7          9  |   13       3         5
 14       4          7  |   14       0         4
 15       0          7  |   
 16       0          2  |   

在左侧，您可以看到一个包含数组的 ArrayList，在右侧可以看到另一个包含数组的 ArrayList。

但是，我不知道如何在一行中打印两个数组的值时迭代这两个数组。特别是当两个 ArrayLists 的大小不相同时..

到目前为止，这是我的代码......我不知道如何实现它

private void printDrinks(ArrayList<int[]> storageRoom, ArrayList<int[]> saleRoom){
        System.out.format("%10s %10s %10s %40s %10s %10s %10s", "EAN", "STOCK", "CAPACITY", "|", "EAN", "STOCK", "CAPACITY"); System.out.println();
        String row = "";

        for (int i = 0; i < storageRoom.size(); i++){
            row += String.format("%10s %10s %10s %10s", storageRoom.get(i)[0], storageRoom.get(i)[1], storageRoom.get(i)[2]);
        }

        for (int i = 0; i < saleRoom.size(); i++){
            row += String.format("%10s %10s %10s %10s", saleRoom.get(i)[0], saleRoom.get(i)[1], saleRoom.get(i)[2]);
        }

        System.out.println(row);
    }

各位大神能给个提示或者帮帮我吗？亲切的问候，谢谢！

标签： javaarraysarrayliststring-formattingout

Answer 1

首先找到要打印的总行数，然后循环多次。如果当前行超过列表的大小，则打印空格（左）或不打印（右）。

private static void printDrinks(List<int[]> storageRoom, List<int[]> saleRoom){
    int rows = Math.max(storageRoom.size(), saleRoom.size());
    System.out.println("EAN   STOCK   CAPACITY  |  EAN   STOCK   CAPACITY");
    for (int i = 0; i < rows; i++) {
        if (i < storageRoom.size())
            System.out.printf("%3d %7d %10d  |", storageRoom.get(i)[0], storageRoom.get(i)[1], storageRoom.get(i)[2]);
        else
            System.out.printf("%25s", "|");
        if (i < saleRoom.size())
            System.out.printf("  %3d %7d %10d", saleRoom.get(i)[0], saleRoom.get(i)[1], saleRoom.get(i)[2]);
        System.out.println();
    }
}

测试

printDrinks(Arrays.asList(new int[][] {{10,3,3},{11,1,6},{12,5,7},{13,7,9},{14,4,7},{15,0,7},{16,0,2}}),
            Arrays.asList(new int[][] {{10,2,4},{11,4,5},{12,6,9},{13,3,5},{14,0,4}}));

printDrinks(Arrays.asList(new int[][] {{10,2,4},{11,4,5},{12,6,9},{13,3,5},{14,0,4}}),
            Arrays.asList(new int[][] {{10,3,3},{11,1,6},{12,5,7},{13,7,9},{14,4,7},{15,0,7},{16,0,2}}));

输出

EAN   STOCK   CAPACITY  |  EAN   STOCK   CAPACITY
 10       3          3  |   10       2          4
 11       1          6  |   11       4          5
 12       5          7  |   12       6          9
 13       7          9  |   13       3          5
 14       4          7  |   14       0          4
 15       0          7  |
 16       0          2  |

EAN   STOCK   CAPACITY  |  EAN   STOCK   CAPACITY
 10       2          4  |   10       3          3
 11       4          5  |   11       1          6
 12       6          9  |   12       5          7
 13       3          5  |   13       7          9
 14       0          4  |   14       4          7
                        |   15       0          7
                        |   16       0          2