Sorry, the jpy tutorial is not yet written. Meanwhile please refer to jpy’s Python and Java unit-level tests in order to learn how to use jpy. They are located at

Using jpy with Python

Using the Java Standard Library

Calling your Java Classes from Python

Primitive array parameters that are mutable

Primitive array parameters that are return value

Using jpy with Java

Getting Started

Using the Python Standard Library

Calling your Python functions from Java

Extending Java with Python