This version of Jython has support for most of Python 2.2 and numerous features from Python 2.3 also JDK 1.4.

The new release includes many major changes:

• new-style classes
• Java Collections integration
• PEP 302 implementation
• iterators
• generators
• __future__ division
• support for running on JDK1.5
• new installer
• a significant number of features to bring Jython in line with CPython

Related:
>> Jython vs Groovy

Reference:
>> Download Jython 2.2a1
>> Jython 2.2alpha1 has been released
>> Jython WIKI
>> Jython Homepage