示例(
from Wikipedia)：
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.Native;
/** Simple example of Windows native library declaration and usage. */
public class BeepExample {
public interface Kernel32 extends StdCallLibrary {
// FREQUENCY is expressed in hertz and ranges from 37 to 32767
// DURATION is expressed in milliseconds
public boolean Beep(int FREQUENCY,int DURATION);
public void Sleep(int DURATION);
}
public static void main(String[] args) {
Kernel32 lib = (Kernel32) Native.loadLibrary("kernel32",Kernel32.class);
lib.Beep(698,500);
lib.Sleep(500);
lib.Beep(698,500);
}
}
在这种情况下,我们从“kernel32.dll”库中加载它.
我希望这样可以使JNA更加清晰.
编辑：我会解释一下代码：您需要使用库中需要的函数定义一个接口(扩展com.sun.jna.Library).然后,调用com.sun.jna.Native.loadLibrary(“LibraryName”,InterfaceName.class).最后,将输出存储在具有接口类型的变量中.只需调用该变量的函数.
