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Java Native Access (JNA) is a community-developed library that provides Java programs easy access to native shared libraries without using the Java Native Interface (JNI). JNA's design aims to provide native access in a natural way with a minimum of effort. Unlike JNI, no boilerplate or generated glue code is required.
In software design, the Java Native Interface (JNI) is a foreign function interface programming framework that enables Java code running in a Java virtual machine (JVM) to call and be called by [1] native applications (programs specific to a hardware and operating system platform) and libraries written in other languages such as C, C++ and assembly.
JNAerator is a computer programming tool for the Java programming language which automatically generates the Java Native Access (JNA) or BridJ code needed to call C, C++ and Objective-C libraries from Java code. It reads in ANSI C header files and emits Java code. Some optional customization can be done through command line options, which can ...
J/Direct was a technology included in some versions of Microsoft Java Virtual Machine, which allowed direct calls into the Windows API. J/Direct was specific of Microsoft's Virtual Machine, in replacement of the standard Java Native Interface (JNI). A Java program which used J/Direct would not run on platforms other than Microsoft Windows.
The first Java GUI toolkit was the Abstract Window Toolkit (AWT), introduced with Java Development Kit (JDK) 1.0 as one component of Sun Microsystems' Java platform. The original AWT was a simple Java wrapper library around native (operating system-supplied) widgets such as menus, windows, and buttons.
Java Native Interface (JNI), which provides an interface between Java and C/C++, the preferred systems languages on most systems where Java is deployed. Java Native Access (JNA) provides an interface with native libraries without having to write glue code. Another example is JNR
The Java Native Interface invokes a high overhead, making it costly to cross the boundary between code running on the JVM and native code. [68] [69] [70] Java Native Access (JNA) provides Java programs easy access to native shared libraries (dynamic-link library (DLLs) on Windows) via Java
This adaption code must be coded in a non-Java language, often C or C++. Java Native Access (JNA) allows easier calling of native code that only requires writing Java code, but comes at a performance cost. In addition, third party libraries provide Java-Component Object Model (COM) bridging, e.g., JACOB , and J-Integra for COM (proprietary).