Obsolete since Gecko 16.0 (Firefox 16.0 / Thunderbird 16.0 / SeaMonkey 2.13)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
Summary
Core Object
A top-level object used to access any Java class in the package java.*.
The support for this object was removed in Gecko 16, see LiveConnect for details.
Created by
The java object is a top-level, predefined JavaScript object. You can automatically access it without using a constructor or calling a method.
Description
The java object is a convenience synonym for the property Packages.java.