如何忽略以//使用扫描仪类和分隔符开头的整行文本

Question

我正在尝试从.txt文件中读取数据，我需要忽略以//开头的任何行或空白行，但是我似乎无法使定界符起作用正确。

public void readVehicleData()
throws FileNotFoundException
{
    FileDialog fileBox = new FileDialog(myFrame, "Open", FileDialog.LOAD);
    fileBox.setVisible(true);

    String filename = fileBox.getFile();
    File vehicleData = new File(filename);

    Scanner scanner = new Scanner(vehicleData).useDelimiter("\"(,\")?");


    while( scanner.hasNext() )
    {
        String lineOfText = scanner.nextLine();

        System.out.println(lineOfText);

    }
    scanner.close();
}

这是我尝试读取的.txt文件：

// this is a comment, any lines that start with //
// (and blank lines) should be ignored

AA, TF-63403, MJ09TFE, Fiat 
A, TF-61273, MJ09TFD, Fiat
A, TF-64810, NR59GHD, Ford
B , TF-68670,MA59DCS, Vauxhall
B, TF-61854,  MJ09TFG, Fiat
B, TF-69215, PT09TAW, Peugeot
C, TF-67358, NR59GHM, Ford

Answer 1

如果我正确理解了您的问题，则无需指定定界符。

Scanner scanner = new Scanner(vehicleData);


while( scanner.hasNext() )
{
    String lineOfText = scanner.nextLine();
    if(lineOfText.length() == 0 || lineOfText.startsWith("//"))
            continue;
    System.out.println(lineOfText);

}
scanner.close();