Java – why does my swing GUI look different in design from the runtime?

When I use swing to design my GUI, the swing control buttons are gray, and the text easily fits them However, when I run the program, the buttons turn partially blue and the text no longer fits them Why does my program look different from the runtime in swing design?

Solution

It may have something to do with your look and feel

Maybe it's because you don't use layout managers The layout manager ensures that components are displayed correctly, even when switching between LAFS

I can't guess what tool you used to create the GUI, but you're doing something wrong with it If you need more help, please publish sscce showing the problem