.h file
#include <jni.h>
#include "NativePackage_HelloWorld.h"
#include <stdio.h>
JNIEXPORT void JNICALL Java_NativePackage_HelloWorld_displayHelloWorld(JNIEnv *env, jobject obj) {
printf("Hello world!\n");
return;
}
Java
package NativePackage;
public class HelloWorld {
public native void displayHelloWorld();
static {
System.loadLibrary("hello");
}
public static void main(String[] args) {
new HelloWorld().displayHelloWorld();
}
}
.c文件
#include <jni.h>
#include "NativePackage_HelloWorld.h"
#include <stdio.h>
JNIEXPORT void JNICALL Java_NativePackage_HelloWorld_displayHelloWorld(JNIEnv *env, jobject obj){
printf("Hello world!\n");
return;
}
我已经使用编译器编译了我的.c文件
gcc -I /Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/include/ -I /Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/include/darwin/ -fPIC -o hello -c HelloWorldImp.c
然而,尝试使用
java NativePackage/HelloWorld
运行会产生以下错误:java -Djava.library.path=NativePackage/ NativePackage/HelloWorld
Exception in thread "main" java.lang.UnsatisfiedLinkError: no hello in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1857)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1119)
at NativePackage.HelloWorld.<clinit>(HelloWorld.java:7)
我正在运行MAC OS X 10.10操作系统。
java -Djava.library.path=NativePackage/ NativePackage.HelloWorld
。你把 'hello' 共享库放在哪里了? - user207421-shared
标志进行编译,在Mac OS X上库的命名方案为libXXX.dylib
。 - Samuel Audet