(If you still don’t see Java, you probably don’t have it installed, in which case you don’t need this tip.) On the General tab, in the Temporary Internet Files section, click Settings.

You want to use a temporary file on the local filesystem. Use the static method createTempFile of Java’s built-in java.io.File class to create a temporary file in the default temporary-file directory ...

This trace is somewhat odd, as creating a new temp file should not result in failing if the file doesn't exist. Digging into a local JVM it looks like it tries to do some tests with Posix file ...

To clear the Java cache, open the Java control panel, which you can find in the Windows Control Panel or in System Preferences on a Mac. You can also try deleting the temporary internet files ...