In 2003, Apple issued a Java 1.4.1 implementation that broke any QTJ applications that tried to run under 1.4.1 on Mac OS X.
The underlying problem was Apple's move from Carbon to Cocoa for their AWT implementation, and the removal of a Java-to-native library called "JDirect" that QTJ relied on.
The new version also neglected to provide a component to show a visual preview of the input from a capture device, such as a webcam or camcorder.
The result is more like a genuine object-oriented API than other C-to-Java adaptations (such as JOGL, which dumps the OpenGL header files into classes with thousands of static methods).
However, as Apple owns the "QuickTime" trademark, there is no realistic chance of a namespace collision, the prevention of which is the purpose of the package naming convention.
Windows machines that use the no-execute (NX) page-protection security feature of recent CPUs cannot run even the demos without changing the configuration.
Apple has also not offered new classes to provide the capture preview functionality that was present in versions of QTJ prior to 6.1.