java - 查找数组中行的绝对值，然后打印答案中的最大值

Question

我目前需要仅使用绝对值将所有行添加到数组中，然后找出三个答案中的最大值。

这是我目前得到的:

public static int maxRowAbsSum(int[][] array) {
    int[][] maxRowValue = {

                            {3, -1,  4,  0},
                            {5,  9, -2,  6},
                            {5,  3,  7, -8}

                       };
    int maxRow = 0;
    int indexofMaxRow = 0;
        for (int column = 0; column < maxRowValue[0].length; column++) {
            maxRow += maxRowValue[0][column];
            }

            for (int row = 1; row < maxRowValue.length; row++) {
                int totalOfRow = 0;
                for (int column = 0; column < maxRowValue[row].length; column++){
                    totalOfRow += maxRowValue[row][column];

                    if (totalOfRow > maxRow) {
                        maxRow = totalOfRow;
                        indexofMaxRow = row;
                    }
                }

                System.out.println("Row " + indexofMaxRow + " has the sum of " + maxRow);
            }
            return indexofMaxRow;
        }

但这仅返回索引第 1 行总计，而不使用绝对值。

更新:我将如何编写 JUnit 代码来使用assertArrayEquals 进行测试？

Answer 1

访问该行中的所有元素后应该得到总和，单独计算第一行是多余的:

int maxRow = 0;
int indexofMaxRow = 0;

for (int row = 0; row < maxRowValue.length; row++) {
    int totalOfRow = 0;
    for (int column = 0; column < maxRowValue[row].length; column++){
         if (maxRowValue[row][column] > 0) {
             totalOfRow += maxRowValue[row][column];
         } else {
             totalOfRow -= maxRowValue[row][column];
         }
     }
     if (totalOfRow > maxRow) {
         maxRow = totalOfRow;
         indexofMaxRow = row;
     }
}
System.out.println("Row " + indexofMaxRow + " has the sum of " + maxRow);
return indexofMaxRow;