Basic troubleshooting tips for Java issuesIf you are having problems related to Java, the following tips should help you getting things working.
» Download and Install Java
» Use Java
» Test Java
» Remove Old Versions of Java
Uninstall any non-working Java installations
Try the offline installer package (Windows only)
The offline installer package will often complete successfully even though the online installer package has encountered a problem. The offline installer package file is large and will take longer to download than the online installer.
Temporarily turn off firewall or antivirus clients
Active firewall or antivirus software may prevent Java from installing properly. Remember to turn your firewall or antivirus software back on when you have successfully completed the Java install.
You can test your Java installation using the instructions in the Test Java section below.
Once you have determined that Java is installed correctly, try the following items to help you run a particular Java application.
Restart your browser after installing Java to enable the new version
If you are still prompted to update Java after installing the latest version, try restarting your browser. Close all of the browser windows, then reopen any web pages that require Java. Starting a new browser session should make the latest installed version of Java active in your browser.
Activate Java, when prompted by the browser
If Java is not activated in the browser, you will be unable to run Java applications in that browser.
Check if the Java plug-in is enabled in the browser
Browsers may disable the Java plug-in or related add-ons by default. You may need to configure your browser to enable the Java plug-in.
Verify that Java is enabled in the Java Control panel
If Java is not enabled in the Java Control Panel, you will be unable to run Java applications in any browser.
Configure security settings
Ensure that the Java security level is not preventing the application from running. The default security level may restrict the ability to run applications that may present a risk to your computer.
Clear the Java cache (temporary) files
Sometimes a corrupted file in the Java cache can prevent an application from running. You
can safely delete the temporary files that Java downloads since Java will download them
again and ensure they are up-to-date.
Check Antivirus or Firewall settings related to Java
Users should check with antivirus security apps and also Firewall settings to see if there are areas to configure java plugins and if they could add trusted sites.
Java does not work in Firefox after installing Java 7 Update 10 (7u10) and above (Windows only)
This is caused by a conflict between Java 7u10 and above and previous standalone
installations of JavaFX.
Verify proxy settings
Ensure that you are using the appropriate proxy settings if they are necessary for your particular internet configuration.
Ensure that Java is enabled in your browser
Once the Java installation has completed, you can use the following test page to verifiy that Java is working in your browser. It is possible that Java has been disabled in your browser and if so, the browser will show a message within the test applet on the page.
Uninstall Old Versions of Java (Windows only)
Remove all old Java versions to reduce security risks
Keeping old and unsupported versions of Java on your system presents a serious security risk. Uninstalling older versions of Java from your system ensures that Java applications will run with the most up-to-date security and performance improvements.
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