通过选择JComboBox选项动态添加JTextFields和JLabel

I want to write a program that allows user to connect,view and add or delete values from database. I'm stuck with the swing part. When i select a combobox option nothing happens but i want to create a view like mysql workbench. It suppose to be like that; user picks a table name from combobox and can see column names from that table and textfields to add new values or existing values above column names. I want to write a program that allows user to c