This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

UninstallJava

UninstallJava[]
shuts down the Java runtime that was started by InstallJava.
  • UninstallJava is provided mainly for developers who are actively recompiling Java classes for use in Mathematica and therefore need to shut down and restart the Java runtime to reload the modified classes.
  • Users generally have no reason to call UninstallJava. The Java runtime is a shared resource used by potentially many Mathematica programs. You should leave it running unless you are absolutely sure you need to shut it down.