Java and C language interface
Step 1: Statement of local variables
For example: class NativeHello (
Public native void nativeHelloWorld ();
(Static
System.loodlibrary ( "nativeTest ");// call nativeTest.dll library files
)
)
Step 2: generating header files
NativeHello.java javac compiler to use, reuse javah generated c of the headers. H documents
Step 3: Root document generation
Order as follows: javah-stubs NativeHello (Generation NativeHello.c)
Step 4: Prepare a C program (here assumed that document, entitled NativeTest.c)
# Include <stdio.h>
# Include <NativeHello.h> / / refers to the second step of the production. H documents
# Include <stubpreamble.h> / / JDK that the document include the
Void Nativehello_nativeHelloWorld (struct HNativeHello * this) (
………
) / * Function names Nativehello_nativeHelloWorld not arbitrary designation, can be generated from the first javah identified in the document, can also be used
Naming the following methods: class name _ the local approach (struct H * this category) * /
Step 5: Build DLL files
NativeHello.c nativeTest.c and will be compiled as DLL library files, the file name and System.loodlibrary ( "nativeTest") the same name in the paper
Finally talk about the testing method, source files are as follows:
(Class UseNative
Public static void main (String [] args) (
NativeHello nh = new NativeHello ();
Nh.nativeHelloWorld ();
)
)
Tags: interface, java interface, java language, java programming language