serial-port - gnu.io.PortInUseException : Unknown Application?

void connect ( String portName ) throws Exception
{
    CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
    if ( portIdentifier.isCurrentlyOwned() )
    {
        System.out.println("Error: Port is currently in use");
    }
    else
    {
        System.out.println(portIdentifier.getCurrentOwner());
        CommPort commPort = portIdentifier.open(this.getClass().getName(),2000);

        if ( commPort instanceof SerialPort )
        {
            SerialPort serialPort = (SerialPort) commPort;
            serialPort.setSerialPortParams(115200,SerialPort.DATABITS_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);

            InputStream in = serialPort.getInputStream();
            OutputStream out = serialPort.getOutputStream();

            (new Thread(new SerialReader(in))).start();
            (new Thread(new SerialWriter(out))).start();

        }
        else
        {
            System.out.println("Error: Only serial ports are handled by this example.");
        }
    }
}

在给

gnu.io.PortInUseException: Unknown Application
    at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:354)

我在Windows 7家庭版64位中将RXTX与Java一起使用。

最佳答案

检查您的计算机上是否存在/var/lock文件夹。
mkdir /var/lockchmod go+rwx /var/lock