One way to accomplish this is to use the Java Control Troubleshooting, debugging, profiling and other developmentĪctivities may require launching JVM with a special set of
enable/disable use of Java Plugin in the particular.set "global" parameters to be passed to JVM when applet or.
temporarily enable/disable use of particular version of.see what versions of JRE are installed and active.On Windows operating systems, youĬan also access it from Control Panel > Java. The JavaĬontrol Panel can be launched from the bin directory Installed Java Runtime Environments and their behavior. You can use the Java Control Panel tool to manage the list of If javascript is disabled, then an attempt to launch a JavaĪpplet may fail at very early stage. To workĪround this, make sure you launch Java Control Panel asĪdministrator if you need to alter these settings. On Windows 7 or Windows Vista systems with UAC on, the JavaĬontrol Panel may fail to update global registry settings. Java Control Panel fails to make changes in the JavaĬonfig. Generation plugin" is enabled in the Java Control Panel. Unless you need to run in the legacy mode, make sure "New Make sure new generation plugin is enabled. The Java Control Panel and your browser plugins/addons list. There are multiple places where Java could be disabled. Any change in the Java Runtime configuration requires theīrowser to be restarted Java is not enabled. The only way to ensure use of an older plugin is used is The JRE will always register plugin from latest JRE on the systemĪs active. There could be just one plugin registered in the browser and Latest matching plugin/webstart is always used. Likewise, the 32-bit JRE is necessary for 32-bitīrowsers. You use a 64-bit browser, then the 64-bit version of the JRE is Is required to be able to run an applet or webstart. It is not sufficient to install the Java Developer Kit. On Windows, check the list of installed programs in the Controlħ.1.2 Common Configuration Problems There is no Java Runtime installed.Make sure the Java Runtime Environment is installed.
Internet Explorer: Choose Tools > Manage.Firefox: Choose Tools > Addons > Plugins.Chrome: Type about: plugins in the location.Reported, then the plugin is enabled and found.Ĭheck that your browser knows about the Java plugin. If you see that the expected Java technology version is.Click on the Verify Java version button.If your application will not run, perform the following 7.1 Configuration Problems 7.1.1 Validation This chapter describes some problems and solutions related toĭeploying Java applications.
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