First JNI exploration, small experiment, and first jni Exploration

First JNI exploration, small experiment, and first jni Exploration

First jni test :(

Documentation: http://download.csdn.net/detail/u010476739/8065987)

Test environment, vs2010 flagship edition, win7 flagship 64-bit MyEclipse2014

1. Compile a java class:

Public classNativeClass {

Public native voidShow ();

Public static voidMain (String [] args ){

System.LoadLibrary("NativeClass ");

NewNativeClass (). show ();

}

}

 

2. Compile the file into a class file, place the class file on the desktop, and use javahNativeClass to generate the NativeClass. h file ,:

 

 

3. Open vs2010 to create the win32 type of the project:

After the creation is successful, write the code:

// NativeClass. cpp: Define the definition? DLL application | use? What is the degree of degree in the descending order of Cheng Yu? Export? Outbound? Letter ¥ number ° y. Zookeeper

//

 

# Include "stdafx. h"

# Include "jni. h"

# Include "NativeClass. h"

 

 

JNIEXPORT void JNICALL Java_NativeClass_show

(JNIEnv *, jobject)

{

Printf ("Helloworld! \ N ");

Return;

}

 

Final

Because the entered Code contains: # include "jni. h "# include" NativeClass. h ", so we need to put these two header files in the vs2010 directory, jni. h: E: \ Java \ jdk1.7.0 _ 45 \ include \ path (or you need to copy jawt_md.h In the subdirectory win32 under this directory together ),

 

Then configure the configuration when vs2010 is generated: (because my system is win7 64-bit, the compiled dll is 64bit, and eclipse also needs to call 64-bit), the configuration steps are as follows:

 

Then select Run or f5,

Find the dll file after generation,

Put this dll file into eclipse,

Let's run it in eclipse. The effect is as follows:

OK, success!