问题
bit of an issue. I'm trying to make a JSwing frame with a label, textfield, and two buttons. When the routine first runs, the buttons and the textframe are invisible. When I resize the frame, the buttons and textframe appear, and remain there when I return the frame to its original size. Any ideas why this is happening?
回答1:
You should call setVisible(true) on your frame after you added the components to get them rendered in your frame. See this answer for more information.
回答2:
After adding the elements, you may want to call revalidate(). Post your code for more help.
来源：https://stackoverflow.com/questions/34645125/jswing-components-dont-appear-until-frame-is-resized