@Goblin: Ist zwar nicht mein eigener Senf...
Zitat Zitat von CommPort.getOutputStream
Code:
public abstract OutputStream getOutputStream() throws IOException

    Returns an output stream. This is the only way to send data to the communications port. If the port is unidirectional and doesn't support sending data, then getOutputStream returns null.

    Returns:
        OutputStream object that can be used to write to the port 
    Throws: IOException
        if an I/O error occurred