Question

我在尝试用Java编写语法以执行我想要对此文件执行的操作时遇到了麻烦

我正在做的是读取文件并且我想将文件的特定行添加到2D数组的元素中，我在下面写了一些伪代码以帮助理解我想要做什么

    try
    {
        FileInputStream fStream = new FileInputStream(fileName);
        DataInputStream inStream = new DataInputStream(fStream);
        BufferedReader brRead = new BufferedReader (new InputStreamReader(inStream));

        String line;

        while ((line = brRead.readLine()) !=null)
        {
            //Lines 1-3 
            //{
            // Add line 1 into element 0,0 of my array
            // Add line 2 into element 0,1 of my array
            // Add line 3 into element 0,2 of my array
            //}

            //Lines 4-10
            //{
            // Add line 4 into element 1,0 of my array
            // Add line 5 into element 1,1 of my array
            // ect..
            //}
        }
    }
    catch (Exception e)
    {

    }
}

Answer 1

假设2d阵列都是3 x 3（没有清楚解释）。算法和代码可能类似于下面的内容，这非常简单。

try
{
    FileInputStream fStream = new FileInputStream(fileName);
    DataInputStream inStream = new DataInputStream(fStream);
    BufferedReader brRead = new BufferedReader (new InputStreamReader(inStream));

    String line;
    int lineCount = 0;
    int mod9 = -1;
    int firstIndex = -1;
    int secondIndex = -1;
    double[][] array = new double[3][3];
    while ((line = brRead.readLine()) !=null)
    {
        //Lines 1-3 
        //{
        // Add line 1 into element 0,0 of my array
        // Add line 2 into element 0,1 of my array
        // Add line 3 into element 0,2 of my array
        //}
        mod9 = lineCount % 9 ;
        firstIndex = mod9 / 3;
        secondIndex = mod9 % 3;
        array[firstIndex] += Double.parseDouble(line);
        lineCount++;
        //Lines 4-10
        //{
        // Add line 4 into element 1,0 of my array
        // Add line 5 into element 1,1 of my array
        // ect..
        //}
    }
}
catch (Exception e)
{

}

将文件中的行添加到2D数组Java

1 个答案: