Self-Review Exercises

22.1Fill in the blanks in each of the following statements:

  1. The__________ class is used to create a menu object.

  2. The__________ method of class JMenu places a separator bar in a menu.

  3. JSlider events are handled by the__________ method of interface _________.

  4. The GridBagConstraints instance variable ________is set to CENTER by default.

22.2State whether each of the following is true or false. If false, explain why.

  1. When the programmer creates a JFrame, a minimum of one menu must be created and added to the JFrame.

  2. The variable fill belongs to the GridBagLayout class.

  3. Drawing on a GUI component is performed with respect to the (0, 0) upper-left corner coordinate of the component.

  4. The default layout for a Box is BoxLayout.

22.3

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