如何简单地添加一个方法调用以将本机GetForegroundWindow匹配到您的界面，就像这样：
import com.sun.jna.*;import com.sun.jna.platform.win32.WinDef.HWND;import com.sun.jna.win32.*;public class JnaTest { public interface User32 extends StdCallLibrary { User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class); HWND GetForegroundWindow(); // add this int GetWindowTextA(PointerType hWnd, byte[] lpString, int nMaxCount); } public static void main(String[] args) throws InterruptedException { byte[] windowText = new byte[512]; PointerType hwnd = User32.INSTANCE.GetForegroundWindow(); // then you can call it! User32.INSTANCE.GetWindowTextA(hwnd, windowText, 512); System.out.println(Native.toString(windowText)); }}
