保存自己一些痛苦，使用

JNA.你将需要

download jna.jar和jna-platform.jar的Win32 API。

pinvoke wiki和

MSDN对于找到正确的系统调用非常有用。

无论如何，这里是打印当前活动窗口的标题和过程的代码。

import static enumeration.EnumerateWindows.Kernel32.*;

import static enumeration.EnumerateWindows.Psapi.*;

import static enumeration.EnumerateWindows.User32DLL.*;

import com.sun.jna.Native;

import com.sun.jna.Pointer;

import com.sun.jna.platform.win32.WinDef.HWND;

import com.sun.jna.ptr.PointerByReference;

public class EnumerateWindows {

private static final int MAX_TITLE_LENGTH = 1024;

public static void main(String[] args) throws Exception {

char[] buffer = new char[MAX_TITLE_LENGTH * 2];

GetWindowTextW(GetForegroundWindow(), buffer, MAX_TITLE_LENGTH);

System.out.println("Active window title: " + Native.toString(buffer));

PointerByReference pointer = new PointerByReference();

GetWindowThreadProcessId(GetForegroundWindow(), pointer);

Pointer process = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, false, pointer.getValue());

GetModuleBaseNameW(process, null, buffer, MAX_TITLE_LENGTH);

System.out.println("Active window process: " + Native.toString(buffer));

}

static class Psapi {

static { Native.register("psapi"); }

public static native int GetModuleBaseNameW(Pointer hProcess, Pointer hmodule, char[] lpBaseName, int size);

}

static class Kernel32 {

static { Native.register("kernel32"); }

public static int PROCESS_QUERY_INFORMATION = 0x0400;

public static int PROCESS_VM_READ = 0x0010;

public static native int GetLastError();

public static native Pointer OpenProcess(int dwDesiredAccess, boolean bInheritHandle, Pointer pointer);

}

static class User32DLL {

static { Native.register("user32"); }

public static native int GetWindowThreadProcessId(HWND hWnd, PointerByReference pref);

public static native HWND GetForegroundWindow();

public static native int GetWindowTextW(HWND hWnd, char[] lpString, int nMaxCount);

}

}