如何设置JDialog的透明背景
嘿，..
我如何设置背景透明并“删除”关闭操作（标记为红色）？ 我只想出示卡片:-)
谢谢..！
Hy,..
how can i set the background transparent and "remove" the closeoperation (marked red) ?
I only want to show the card :-)
Thanks..!
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评论（3）
虽然 UNDECORATED JFrame 透明度没有问题（myJFrame.setBackground (new Color (0,0,0,0)); 已经足够漂亮了），但与 JDialog 一样不起作用。
然而，我发现以下序列对于 JDialog 来说是完美的：
A 也保留，但这是我私人的、谦虚的建议，所有对 Window 扩展器（例如 JFrame、JDialog）的 setBackground 调用都应该针对 UnsupportedOperationException 和 IllegalComponentStateException 进行尝试。
Although there is no problem with UNDECORATED JFrame transparency (myJFrame.setBackground (new Color (0,0,0,0)); is pretty enough), the same with JDialog is not working.
I discovered, however, the following sequence works perfect for JDialog:
A also remain, but it is my PRIVATE, humble suggestion, that all setBackground call for Window extenders (e.g. JFrame, JDialog) should be tried against UnsupportedOperationException and IllegalComponentStateException.
yourDialog.setUndecorated(true)应该可以解决标题栏的问题。用于使框架透明。您必须在根面板上使用
yourDialog.getRootPane().setOpaque(false)进行操作。yourDialog.setUndecorated(true)should do the trick for the title bar.For having the Frame transparent. You'll have to work on the root panel with
yourDialog.getRootPane().setOpaque(false)on it.我按照文章中的说明进行操作，最终成功了，而且一点也不困难。 :)
我现在有了半透明的 SplashImage 和 About 屏幕，它显示 PNG 图像并尊重其（复杂的）透明度。太棒了。
请注意，在 JDK 7 中，继续操作的方法会略有变化。
只需注意关键字之间的差异即可。
http://download.oracle.com/javase/tutorial/uiswing /misc/trans_shape_windows.html#6u10
如果这个技巧能奏效那就太好了
，但对我来说却没有。也许我做错了什么。
我还注意到使用 setContentPane(Component); 很重要而不是 getContentPane.add(Component);
我很高兴它现在可以工作了！ :)
I followed the instructions from the article and it worked finnaly AND it wasn't difficult at all. :)
I now have my translucent SplashImage ans About screen which displays a PNG image and respect its (complex) transparency. Just awesome.
Note that the method to proceed will change a little bit in JDK 7.
Just notice the difference between keywords.
http://download.oracle.com/javase/tutorial/uiswing/misc/trans_shaped_windows.html#6u10
It would have been nice if the
trick worked but it didn't to me. Maybe I did something wrong.
I also note it is important to use setContentPane(Component); instead of getContentPane.add(Component);
I'm happy it works now ! :)