问题
When I run my gui, I have to resize the window for everything to show up. Does someone know what the problem is?
回答1:
Call pack() on your JFrame, after adding all your components and before calling setVisible(true).
回答2:
When you create the frame call the setSize() method on the frame to set the initial starting size.
回答3:
setVisible(true);
after you have added all desired JComponents to your JFrame helped for me.
回答4:
don't need to add pack() method.
Just add the setSize(int, int) on the end of everything, then it will work well.
and setVisible(true) on next to setSize.
回答5:
I was also having the same problem.
After making any change on the JFrame view, just recall the setVisible(true) method. It just worked for me.
回答6:
The setBounds() method will resize and reposition a Window. however you might want to look at the way your components are laid out if pack() isn't working (I believe it relies on minimum/preferred sizes of components).
来源：https://stackoverflow.com/questions/5498821/i-have-to-resize-my-jframe-for-the-contents-to-show-up-how-can-i-fix-that