How I can clear JRE cache?

After Marvin update, my browser can not load-in applets. Somebody suggested to me to clear JRE cache. But I don't know how to do it.


Can somebody help me?

clear JRE cache

1. Open Java console.
In IE: select "Sun Java console" from "Tools" menu


In Mozilla / Netscape: select Java console from the "Web Development" sub menu of the "Tools" menu.
Note: If there is not a Java console menu item in the browser's menu (like Safari or Firefox) or Java console does not display automatically during applet loading, you should change settings of Java plugin (see it below).





2. Click on the window of Java Console then press "x" to clear the classloader cache.


If the action was successful, the following message should display on the Java console: "Clear classloader cache ... completed.".





3. After restarting the browser, Java will use updated Marvin classes.





Note: If clearing of the JRE cache was not effective via the Java Console (by pressing 'x'), you can delete JRE cached files via Java Control Panel:


1. Open Java Control Panel (see next section how to do it).


2. In the "Java Control Panel" titled window, select the first panel ("General") and push "Delete Files..." button in the "Temporary Internet Files" section.


3. In the popup window, check-in all checkboxes then push the OK button.

How to open Java Control Panel

In Windows:


Take a right click on the Java plugin icon, on the task bar. Select "Properties" from the displaying popup menu.


If the icon is not on the task bar, you can select it from the Start -> Control Panel menu.


In Linux:


Go to the JRE's directory and open ControlPanel.html in the browser. (Since Java 1.5, instead of ControlPanel.html, there is the ControlPanel shell script. Run it, instead of opening any html page.)

Changing Java plugin settings:

To change Java plugin settings, you have to open the control panel of Java plugin (see the above section how to do it). After then, you can change settings on the proper panel:





- On the basic panel you can set to show the Java Console.


- Entering the "Cache" menu, you can delete the content of the cache, by selecting the "Clear" button.

Clear the browser's cache

If the deleting JRE cache is not solve the problem, you should clear also the browser's cache.





In Internet Explorer:
1. Select "Internet Options" from the "Tools" menu of IE.


2. Push the "Delete Files" button in the "Temporary Internet Files" section on the "General" panel. Then close the window by clicking on the "OK" button.





Note: You can change the caching policy by selecting the "Settings" button in the "Temporary Internet Files" section. In the displaying menu, you can set how often check for the newer version of stored pages. If checking frequency is set to "Never", you should change the setting to avoid any caching problem, later.





3. Restart the browser to update settings.
In Mozilla/Netscape:
1. Select "Preferences" from the "Edit" menu of the browser.


2. On the left side of the displaying dialog, you will see a menu tree. Open the "Advanced" node in the tree then select "Cache" in the expanding menu. On the right side, push the "Clear cache" button on the "Cache" panel. Finally, close the "Preferences" dialog by selecting the "OK" button.


3. Restart the browser to validate changes.
In Firefox:
1. Select "Preferences" from the "Edit" menu of Firefox.


2. Enter into the "Privacy" section in the displaying dialog. Select the "Cache" menu on the right side and push the "Cache" button.


3. Close the dialog with the "OK" button.

thanks for your great response!!!

Under Max OS X, you can access Java Control panel by launching "Java Preferences" application from /Applications/Utilities/Java directory. In the control panel, select the "Security" tab where you can find Java caching settings. Submit of the "Delete Files" button on this panel, clear the JRE caches.

If u are using Max osx u can get in java cpanel via java preferences. from utilities java application directory. . U will have to enter security tab and find java caching settings. Submit of the "Delete Files" button on this panel, clear the JRE caches. Now you will have to delete temporary files through Java c-panel, and clear jre cach. It should solve the problem.

Thank you!

Hi everyone,

Besides that the information can be found in this topic is still valid, an updated and illustrated documentation about clearing the java cache can be found on this page.

Regards,
Istvan 

thanks