About This Guide

This guide describes the features and the use of GNAT-AJIS, the GNAT Ada-Java Interfacing Suite that can be used with the GNAT Pro Ada development environment.

What This Guide Contains
What You Should Know before Reading This Guide

What This Guide Contains

This guide contains the following chapters:

• 1. Getting Started with GNAT-AJIS, describes how to set up your environment and illustrates the use of the GNAT-AJIS toolset

• 2. Using ada2java to Generate Java Classes, describes how to use ada2java to generate Java classes that can be used as a "thin binding" to an Ada package specification.

• 3. Mapping Ada to Java, describes how Ada features are mapped to Java by ada2java.

• 4. Advanced ada2java Topics, describes some of the advanced aspects of the mapping of Ada to Java.

• 5. Using javastub to Generate Ada Package Specifications, describes how to use the javastub utility.

• A. Using JNI Directly, describes how to write native methods in Ada with the same low-level style as in C.

What You Should Know before Reading This Guide

Before reading this manual you should be familiar with the following:

• The Ada programming language, and in particular the Ada 2005 Object-Oriented Programming and separate compilation enhancements (e.g., limited with, interfaces) that facilitate interfacing between Ada and Java.

• The GNAT Pro User Guide

• The Java programming language

It will also be useful if you have a basic knowledge of the following:

• JNI (Java Native Interface), for example as described in The Java Native Interface Programmer's Guide and Specification, S. Liang, Addison-Wesley; 1999.