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Thread: CommConnection

  1. #1
    Regular Contributor
    Join Date
    May 2004


    I have the imported the package javax.microedition.io.* . I compile using the default emulator, nokia_7210_MIDP_SDK_V1_0. It gives me an error -- cannot import CommConnection. The same program works in the J2ME emulator provided by Sun Microsystems. Why Does CommConnection not work?

  2. #2
    Regular Contributor
    Join Date
    Jun 2003
    The CommConnection available only in MIDP 2.0 and that is just an option, only HttpConnection and HttpsConnection are mandatory.
    7210 is only MIDP 1.0 device, and as I know no Nokia device exist that implements CommConnection.

    Maybe you can check if a device implements CommConnection with system property or simple open it with Connector and handle ConnectionNotFoundException.

    quote from MIDP 2.0 javax.microedition.io API doc
    The valid identifiers for a particular device and OS can be queried through the method System.getProperty() using the key "microedition.commports". A comma separated list of ports is returned which can be combined with a comm: prefix as the URL string to be used to open a serial port connection.

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