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Editorial Team
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Asked: 2026-05-27T00:54:13+00:00

When I’m trying to open my javafx application in jnlp format I’m getting the

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When I’m trying to open my javafx application in jnlp format I’m getting the following exception:

java.security.AccessControlException: access denied ("java.util.PropertyPermission" "java.net.useSystemProxies" "write")
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.System.setProperty(Unknown Source)
    at org.jugc.view.JugCMain.<clinit>(JugCMain.java:37)
    ... 10 more

How to resolve this?

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1 Answer

  1. Editorial Team

    what kind of operation are you doing at JugCMain.java:37 ?

    Accessing system properties from jnlp/applet are subject to security restrictions.
    All unsigned jnlp/applets are being run in sandbox with limited rights to avoid harming client’s workstation.

    You may want to sign your application if you want to use system propeties, see http://java.sun.com/developer/Books/javaprogramming/JAR/sign/signing.html

    If you are using NetBeans 7.1 for your JavaFX project you can just go to
    “Project Properties->Build->Deployment” and click option “Request unrestricted access”

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