I am very new to java swing and am trying to understand the components.
1. It looks like a Combo-box.
2. Text field is not editable
3. Initially looks like the one in attached image 1a
4. One pointing the mouse on the down arrow on the component, it looks like 1b
5. On clicking the down arrow, open up a new frame
Need your help to understand what is this object and how to create it.