12.4 Fill in the blanks in each of the following statements:

a) The JTextField class directly extends class _______.

b) Container method ________ attaches a GUI component to a container.

c) Method ________ is called when a mouse button is released (without moving the mouse).

d) The ________ class is used to create a group of JRadioButtons.

12.5 Determine whether each statement is true or false. If false, explain why.

a) Only one layout manager can be used per Container.

b) GUI components can be added to a Container in any order in a BorderLayout.

c) JRadioButtons provide a series of mutually exclusive options (i.e., only one can be true at a time).

d) Graphics method setFont is used to set the font for text fields.

e) A JList displays ...

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