JInternalFrame 置于前面并聚焦
如何将 JInternalFrame 推到 JDesktopPane 中所有框架的顶部？
How does one push a JInternalFrame to the top of all the frames in a JDesktopPane?
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尝试grabFocus()和requestFocus()。其中之一应该有效。我个人只使用了requestFocus()。
try grabFocus() and requestFocus(). One of the should work. I personally used only requestFocus().
阅读 JInternalFrame API 并点击有关“如何使用内部框架”的 Swing 教程的链接，您将在其中找到如何“选择”活动内部框架的工作示例。
Read the JInternalFrame API and follow the link to the Swing tutorial on "How to Use Internal Frames" where you will find a working example of how to "select" the active internal frame.
在此示例中，一个
javax.swing .Action用于从菜单中选择帧。In this example, a
javax.swing.Actionis used to select frames from a menu.OP 注意到
setSelected不起作用，他需要手动调用activateFrame。这听起来与我在GTKLookAndFeel中遇到的问题类似。我有一个应用程序，它全部连接起来使用setSelected最终触发activateFrame。与 Windows 和 Mac 原生外观和感觉配合良好；activateFrame将被自动调用。在 Ubuntu 上，系统选择的 LaF 是
GTKLookAndFeel，并且无论出于何种原因，它都没有调用activateFrame。看起来setSelected并没有抛出错误或任何东西，它只是没有像其他 LaF 那样调用activateFrame。我认为这是一个GTKLookAndFeel兼容性问题。最后我押注了这一点，只是禁止了
GTKLookAndFeel，而是用Metal取代了它。Motif也有兼容的行为（但它太丑了......）。代码看起来像这样：The OP has noted that
setSelectedwas not working, and he needed to callactivateFramemanually. This sounds similar to an issue I was having withGTKLookAndFeel. I had an application that was all wired up to usesetSelectedto eventually triggeractivateFrame. Worked fine with Windows and Mac native look and feel;activateFramewould get called automatically.On Ubuntu, the system selected LaF was
GTKLookAndFeeland for whatever reason this was not callingactivateFrame. It didn't appear thatsetSelectedwas throwing an error or anything, it just wasn't getting around to callingactivateFrameas the other LaFs seem to do. I think it's aGTKLookAndFeelcompatibility issue.In the end I punted on this and just prohibited
GTKLookAndFeel, replacing it withMetal.Motifalso had the compatible behavior (but it's so ugly...). The code looks something like this:/*通过调用 JInternalFrame 方法 setSelected(false) 取消选择当前的 JInternalFrame
*/然后使用相同的方法选择新的 JInternalFrame;即 setSelected(true)
示例代码：
try{
jframe1.setSelected(假);
jframe2.setSelected(true);
}catch（PropertyVetoException 前）{}
/*make current JInternalFrame deselected by calling JInternalFrame method setSelected(false)
*/then select new JInternalFrame using the same method; ie setSelected(true)
sample code:
try{
jframe1.setSelected(false);
jframe2.setSelected(true);
}catch (PropertyVetoException ex) {}
关闭模态 JInternalFrame
参见Zen先生(我)的帖子
Closing a modal JInternalFrame
see the post by Mr. Zen(me)