如何在Java中获取程序窗口的x和y？ [英] How to get the x and y of a program window in Java?

问题描述

我有办法在java中获取窗口的X和Y值吗？我读到我将不得不使用运行时，因为java不能直接混乱，但我不太清楚如何做到这一点。任何人都可以给我一些关于如何获得这个的链接/提示吗？

Is there a way for me to get the X and Y values of a window in java? I read that I'll have to use runtime, since java can't mess directly, however I am not so sure of how to do this. Can anyone point me some links/tips on how to get this?

推荐答案

获取任何其他的x和y位置不相关的应用程序你将不得不查询操作系统，这意味着可能使用JNI，JNA或其他一些脚本实用程序，如AutoIt（如果是Windows）。我建议使用JNA或脚本实用程序，因为它们比JNI（我的经验有限）更容易使用，但要使用它们，您需要下载一些代码并将其与Java应用程序集成。

To get the x and y position of "any other unrelated application" you're going to have to query the OS and that means likely using either JNI, JNA or some other scripting utility such as AutoIt (if Windows). I recommend either JNA or the scripting utility since both are much easier to use than JNI (in my limited experience), but to use them you'll need to download some code and integrate it with your Java application.

编辑1
我不是JNA专家，但是我确实把它搞砸了，这就是我得到的窗口坐标一些命名窗口：

EDIT 1 I'm no JNA expert, but I do fiddle around with it some, and this is what I got to get the window coordinates for some named window:

import java.util.Arrays;
import com.sun.jna.*;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.win32.*;

public class GetWindowRect {

   public interface User32 extends StdCallLibrary {
      User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class,
               W32APIOptions.DEFAULT_OPTIONS);

      HWND FindWindow(String lpClassName, String lpWindowName);

      int GetWindowRect(HWND handle, int[] rect);
   }

   public static int[] getRect(String windowName) throws WindowNotFoundException,
            GetWindowRectException {
      HWND hwnd = User32.INSTANCE.FindWindow(null, windowName);
      if (hwnd == null) {
         throw new WindowNotFoundException("", windowName);
      }

      int[] rect = {0, 0, 0, 0};
      int result = User32.INSTANCE.GetWindowRect(hwnd, rect);
      if (result == 0) {
         throw new GetWindowRectException(windowName);
      }
      return rect;
   }

   @SuppressWarnings("serial")
   public static class WindowNotFoundException extends Exception {
      public WindowNotFoundException(String className, String windowName) {
         super(String.format("Window null for className: %s; windowName: %s", 
                  className, windowName));
      }
   }

   @SuppressWarnings("serial")
   public static class GetWindowRectException extends Exception {
      public GetWindowRectException(String windowName) {
         super("Window Rect not found for " + windowName);
      }
   }

   public static void main(String[] args) {
      String windowName = "Document - WordPad";
      int[] rect;
      try {
         rect = GetWindowRect.getRect(windowName);
         System.out.printf("The corner locations for the window \"%s\" are %s", 
                  windowName, Arrays.toString(rect));
      } catch (GetWindowRect.WindowNotFoundException e) {
         e.printStackTrace();
      } catch (GetWindowRect.GetWindowRectException e) {
         e.printStackTrace();
      }      
   }
}

当然这是为了工作，需要下载JNA库并将其放在Java类路径或IDE的构建路径中。

Of course for this to work, the JNA libraries would need to be downloaded and placed on the Java classpath or in your IDE's build path.

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