To open a PJava file on Nokia Communicator you need to create an installation package. For making an installation package follow these four steps:
1) Create a .pkg file (e.g., your_file.pkg) for your installation package
2) Run command ?makesis your_file.pkg? at the command prompt to create your_file.sis.
a) Make sure that Nokia 9200 Series SDK for Symbian OS is installed on your system
b) Your response should look like:
C:> makesis your_file.pkg
C:> Processing your_file.pkg...
C:> Created your_file.SIS
3) Transfer your_file.sis to the device via infrared or through the data cable, if available.
4) Locate your_file.sis on the device and run it to install your application.
Make sure Java.sis is installed on your communicator for Java apps to run.