What does focus means?

Question

Just wondering what focus means in java code, because I have seen onWindowFocusChanged, addFocussables, findFocus...

If I have a scrollable list and I scrolled it down, the first item will have focus false? or it means other thing?

Thanks

Answer 1

Focus means you have selected the particular GUI element. For example when you select a window that window gains focus, when you select another window the first window loses focus.... It's the same for JTextField, JTextArea, etc.