How to list suggestions to when typing inside the text field

Question

Hi in my Java swing application I need to show all possible existing entries with same initial characters while user typing in a text field. Lets say user type letter \'A\'

Answer 1

there are two classes (you are needed both for correct funcionalities), Auto Complete JTextField and AutoComplete JComboBox, excelent is that you can set if is strict (allows typing if List doesn't contains ) or not