JComboBox change drop-down popup

Question

basically is popup for a JComboBox displayed below its derived JTextField, how can change direction from bellowed orientations for JComboBox\'s popup and display JComboBox\'

Answer 1

On my system, a JComboBox will open upwards if it is near the bottom of the screen and there is not enough space to open it downwards. (Is that what you meant?)

Given that fact, I doubt it would be easy to alter the defined behavior.