如何确定屏幕保护程序是否正在Java中运行？

尝试使用JNA库来调用SystemParametersInfo系统调用。

下面的示例使用JNA提供的win32示例中的代码：

public class JNATest {    public static void main(String[] args) {        W32API.UINT_PTR uiAction = new W32API.UINT_PTR(User32.SPI_GETSCREENSAVERRUNNING);        W32API.UINT_PTR uiParam = new W32API.UINT_PTR(0);        W32API.UINT_PTR fWinIni = new W32API.UINT_PTR(0);        PointerByReference pointer = new PointerByReference();        User32.INSTANCE.SystemParametersInfo(uiAction, uiParam, pointer, fWinIni);        boolean running = pointer.getPointer().getByte(0) == 1;        System.out.println("Screen saver running: "+running);    }}public interface User32 extends W32API {    User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class, DEFAULT_OPTIONS);    long SPI_GETSCREENSAVERRUNNING = 0x0072;    boolean SystemParametersInfo(        UINT_PTR uiAction,        UINT_PTR uiParam,        PointerByReference pvParam,        UINT_PTR fWinIni      );}