java学习-数组遍历

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/**
     * 按照列遍历数组
     */
    public static void byCol(int m, int n) {
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                System.out.println(array[j][i]);
            }
        }
    }

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/**
     * 获取数组中和最大的一列
     *
     * @param m 行
     * @param n 列
     * @return
     */
    public static double getMaxColSum(int m, int n) {
        double result = 0;
        for (int i = 0; i < n; i++) {
            double temp = 0;
            for (int j = 0; j < m; j++) {
                temp += array[j][i];
            }
            result = Math.max(temp, result);
        }
        return result;
    }

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/**
     * 获取数组中和最大的行
     *
     * @param m 行
     * @param n 列
     * @return
     */
    public static double getMaxRowSum(int m, int n) {
        double result = 0;
        for (int i = 0; i < m; i++) {
            double temp = 0;
            for (int j = 0; j < n; j++) {
                temp += array[i][j];
            }
            result = Math.max(result, temp);
        }
        return result;
    }

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public class ArrayOps {
    public static int[][] array = {
            {1, 2, 3},
            {4, 5, 6},
            {7, 8, 9}
    };

    public static void main(String[] args) {
        int row = array.length;
        int col = array[0].length;
        byCol(row, col);
        System.out.println(getMaxColSum(row, col));
        System.out.println(getMaxRowSum(row, col));
    }

    /**
     * 按照列遍历数组
     */
    public static void byCol(int m, int n) {
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                System.out.println(array[j][i]);
            }
        }
    }

    /**
     * 获取数组中和最大的一列
     *
     * @param m 行
     * @param n 列
     * @return
     */
    public static double getMaxColSum(int m, int n) {
        double result = 0;
        for (int i = 0; i < n; i++) {
            double temp = 0;
            for (int j = 0; j < m; j++) {
                temp += array[j][i];
            }
            result = Math.max(temp, result);
        }
        return result;
    }

    /**
     * 获取数组中和最大的行
     *
     * @param m 行
     * @param n 列
     * @return
     */
    public static double getMaxRowSum(int m, int n) {
        double result = 0;
        for (int i = 0; i < m; i++) {
            double temp = 0;
            for (int j = 0; j < n; j++) {
                temp += array[i][j];
            }
            result = Math.max(result, temp);
        }
        return result;
    }
}

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18.0
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