Like the C++ and Python bindings, the Java bindings are an object-oriented reflection of the C API.
In contrast to the C++ and Python bindings, the Java bindings offered in MuPDF are not generated automatically, and use hand-written code. This means that additions and modifications to the C level API will require corresponding additions and modifications to the Java code.
The Java class definitions can be seen in:
These lean heavily on ’native’ methods. The implementations for these methods are found in platform/java/mupdf_native.c, and use the JNI interface to marry up native functions and data with their Java equivalents.
This Java code is designed to work both on desktop Java, and on Android devices. When built for Android devices, it offers additional classes to give easy access to Android fonts and images, and for rendering into Android bitmaps.