How to change the number of visible items in JComboBox?
In this example you'll see how we can change the default number of visible
items in the combo box. By default it only show eight items at once and when
the combo box has more items a scrollbar will be shown so we can scroll up and
down in the combo box list.
If we want to change this value we can call the
JComboBox. Let's see the following example for more details.