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Editorial Team
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Asked: 2026-05-11T23:31:28+00:00

I’m working on converting a very simple java desktop application to run in java

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I’m working on converting a very simple java desktop application to run in java web start and I’m having all kinds of trouble with the input/output files. Most specifically I can’t seem to find any information on how to handle i/o in a web start application. I tried placing the input files in the same folder on my web server as the jar and jnlp file, but it doesn’t read it.

I’ve got one input file that I want to keep on the web server and read into the application from there.

I’ve got a second file that I want the application to generate on the client machine the first time it’s run, and read in from there every time thereafter.

If anyone knows what considerations I need to take for i/o in java web start or can point me towards a resource that explains it I would appreciate it.

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1 Answer

  1. Editorial Team

    You can find out where you were downloaded from with BasicService and then use HTTP to transfer the file. You could also just add them to a jar.

    You can store a limited amount of information (I think it currently defaults to 128K/muffin) with PeristenceService.

    http://java.sun.com/javase/6/docs/jre/api/javaws/jnlp/

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