java - 使用两种方法添加行和列

Question

请帮忙，我应该使用两种单独的方法(一种用于列，一种用于行)来总结二维数组的每个单独的行和列并将其打印出来(例如:第 1 行 = ，第 2 行= ，第 1 列 = ，第 2 列 = )。到目前为止，我有两个单独的方法，它们只能分别获取第一行和第一列，但我坚持如何在不更改返回值的情况下打印出其他行/列。这是我到目前为止所拥有的:

public class FinalSumRowColumn
{
    public static void main(String[] args)
    {

        int[][] mat = {
                        { 1, 2, 3 },
                        { 4, 5, 6 },
                        { 7, 8, 9 }
                      };

        System.out.println("\nSum Row 1 = " + sumRow(mat));  
        System.out.println("\nSum Col 1 = " + sumCol(mat));
    }

    public static int sumRow(int[][] mat)
    {
        int total = 0;

            for (int column = 0; column < mat[0].length; column++)
            {
                total += mat[0][column];
            }
        return total;
    }

    public static int sumCol(int[][] mat)
    {
        int total = 0;

            for (int row = 0; row < mat[0].length; row++)
            {
                total += mat[row][0];
            }
        return total;
    }
}

Answer 1

为这些方法添加 row 和 col 参数，例如:

public class FinalSumRowColumn {
    public static void main(String[] args) {

        int[][] mat = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};

        System.out.println("\nSum Row 1 = " + sumRow(mat, 0));
        System.out.println("\nSum Col 1 = " + sumCol(mat, 0));
        System.out.println("\nSum Row 1 = " + sumRow(mat, 1));
        System.out.println("\nSum Col 1 = " + sumCol(mat, 1));
        System.out.println("\nSum Row 1 = " + sumRow(mat, 2));
        System.out.println("\nSum Col 1 = " + sumCol(mat, 2));
    }

    public static int sumRow(int[][] mat, int row) {
        int total = 0;

        for (int column = 0; column < mat[row].length; column++) {
            total += mat[row][column];
        }
        return total;
    }

    public static int sumCol(int[][] mat, int col) {
        int total = 0;

        for (int row = 0; row < mat[0].length; row++) {
            total += mat[row][col];
        }
        return total;
    }
}