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Editorial Team
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Asked: 2026-05-28T01:16:21+00:00

After the JNLP gets downloaded in the browser it becomes cached so it doesn’t

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After the JNLP gets downloaded in the browser it becomes cached so it doesn’t need to be downloaded again, which is good. However, as a consequence, if I update the JAR that the JNLP uses, users will still see the old version of the app that is in the cache.

You can clear the cache by running this in the terminal:

javaws -uninstall

But obviously you could not expect from users to run this when your update is ready. It should be more seamless than that.

One idea is to change the jnlp file name so they download new file, like MyJWS-01.jnlp, to include version numbers.

Is there any other way?

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1 Answer

  1. Editorial Team

    “The update element is used to indicate the preferences for how application updates should be handled by Java Web Start.” The default attribute values would seem to “to check for updates until timeout” and “to always download updates without any prompt.” For example,

    <update check="timeout" policy="always"/>

    Are you getting a different result?

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