如何获取 Java 组件 ID

发布于 2024-10-21 00:16:04 字数 508 浏览 6 评论 0原文

我在我的 java 应用程序中使用 MPlayer。根据它的文档，我需要告诉 MPlayer 窗口 ID 来嵌入它。我这样做是这样的：

long winid = 0; //Window ID.
if (osName.startsWith("Windows")){
   final Class<?> cl = Class.forName("sun.awt.windows.WComponentPeer");
   java.lang.reflect.Field f = cl.getDeclaredField("hwnd");
   f.setAccessible(true);
   winid = f.getLong(overlay.getPeer()); //overlay is a canvas where MPlayer is embedded.
}
System.out.println(winid);

但是， getPeer() 方法已被弃用。我想知道是否有解决方法。
非常感谢您的帮助。

原文

I'm using MPlayer in my java application. According to its doc, it's needed that I tell to MPlayer the window ID for embedding it. I'm doing this like that:

long winid = 0; //Window ID.
if (osName.startsWith("Windows")){
   final Class<?> cl = Class.forName("sun.awt.windows.WComponentPeer");
   java.lang.reflect.Field f = cl.getDeclaredField("hwnd");
   f.setAccessible(true);
   winid = f.getLong(overlay.getPeer()); //overlay is a canvas where MPlayer is embedded.
}
System.out.println(winid);

However, the getPeer() method is deprecated. I would want to know if there's a workaround for it.

Thanks a lot for the help.

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囚你心 2024-10-28 00:16:04

我发表了评论，但这值得一个答案。
添加本机代码、MPlayer，因此您将陷入 impl 和操作系统的困境。 getPeer() 的弃用主要是因为你可以用它做一些非常奇怪的事情并且不可移植。

在你的情况下，这并不重要。

附带说明：WComponentPeer 有一个公共 getHWnd() 方法，因此您不需要通过反射来欺骗它。您现在拥有的代码实际上非常不安全，因为它不检查实际的对等点。

你可以这样替换它：

long hWnd = 0
try{ 
  Class clazz = Class.forName("sun.awt.windows.WComponentPeer);
  synchronized(overlay.getTreeLock()){
    ComponentPeer peer = overlay.getPeer();
    if (clazz.isInstance(peer)){
      hWnd = ((sun.awt.windows.WComponentPeer) overlay.getPeer()).getHWnd();
    }
  }
}catch(ClassNotFound _noWindows){
//process..
}

祝你好运！

I dropped a comment but that deserves an answer.
Adding native code, MPlayer, so you are stuck with the impl and the OS. The deprecation of getPeer() is mostly b/c you can do really weird stuff with and not portable.

In your case it doesn't matter.

On a side note: WComponentPeer has a public getHWnd() method, so you do not need to trick it via reflection. The code you have now is actually pretty unsafe since it doesn't check for the actual peer.

you can replace it like that:

long hWnd = 0
try{ 
  Class clazz = Class.forName("sun.awt.windows.WComponentPeer);
  synchronized(overlay.getTreeLock()){
    ComponentPeer peer = overlay.getPeer();
    if (clazz.isInstance(peer)){
      hWnd = ((sun.awt.windows.WComponentPeer) overlay.getPeer()).getHWnd();
    }
  }
}catch(ClassNotFound _noWindows){
//process..
}

good luck!

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