[Java Learning notes] The difference between the pack () and validate () methods of the JFrame class (to be added)

Each time you write a graphical program, only manually adjust the JFrame frame size to display the contents. Using validate () does not work, and pack () can solve this problem.

Pack ()//is automatically adapted to size. When writing a program, if preferred size is defined, the frame size is drawn according to the preferred size, or the component within the container is sized to fit.
Vailate ()//is resized, provided the size has been set (SetSize () has been called) and the size has changed. such as the maximum minimized window.

I want to add ...

[Java Learning notes] The difference between the pack () and validate () methods of the JFrame class (to be added)