Keep JFrame on top of others

问题

I am in a situation where I create a frame FrameB from my main frame FrameA. When the user is working on FrameB I would like it to be on top of FrameA even when the user accidentally clicks on FrameA.

回答1:

Do you have to use a JFrame?

If you use a JDialog instead of a JFrame and assign FrameA as the owner of the dialog through the constructor it will always remain on top of the frame. (Example: How to set the JFrame as a parent to the JDialog)

Otherwise you can use setAlwaysOnTop() from the window class, but this can be dependent on the operating system/window manager.

回答2:

You could consider making FrameB a JDialog instead of JFrame, and set it modal.

来源：https://stackoverflow.com/questions/1620350/keep-jframe-on-top-of-others