13. Graphical user interfaces Flashcards
If A extends B, do instances of A have the properties of those of B, plus more, or vice versa?
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When does the main thread end? When does the virtual machine exit?
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What does the GUI event thread usually spend most of its time doing?
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How does event driven programming differ from the style used in the main method?
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What sort of information is held in ActionEvent objects?
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What is returned by getSource() method?
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What is the purpose of the Container class?
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What argument is given to Container: add() method?
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How to we specify the constraint in the Container: add() method?
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What kind of argument does Container: setLayout() have?
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How do we specify the label when we create a JButton?
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What type is the parameter in the JButton: addActionListener() method?
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What type is the method argument in JButton: setEnabled() method?
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What type is the method argument in JButton: setText() method?
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What part of a GUI does javax.swing.JFrame correspond to?
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Where does the given title typically appear (when using JFrame: setTitle() method)?
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What is the return type of the JFrame: getContentPane() method?
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What four choices do we have as arguments to the JFrame: setDefaultCloseOperation() method?
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When should JFrame: pack() method be called and what does it do?
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What type of argument is given to the JFrame: setVisible() method?
A boolean type
What is the purpose of the JLabel class?
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What type is the method parameter in the JLabel: setText() method?
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What arguments can we give to the constructor when using JTextArea?
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What happens if the given String contains new line characters in the JTextArea: setText() method?
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What is the difference between JTextArea: append() and JTextArea: setText()?
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What does 20 mean in new JTextField(20);
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What method arguments does JTextField: getText() method have?
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What type is the method argument of the JTextField: setText() method?
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What type is the method argument of the JTextField: setEnabled() method?
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How do we specify the initial value in JTextField?
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What does a layout manager do to what things within what other thing?
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In what pattern does LayoutManager: FlowLayout make the components appear, and in what order?
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Name three alignment modes for FlowLayout.
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In what pattern does LayoutManager: GridLayout make the components appear, and in what order?
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How many positions does LayoutManager: BorderLayout have, and what are their names?
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How do we link a listener object to an event source object?
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How many method bodies are contained in the ActionListener interface?
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What type of method argument does actionPerformed() method take?
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What does JPanel contain?
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How do we use the JScrollPane class?
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If A implements B, does A have definitions of the methods in B, or vice versa?
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What does AWT stand for? Which is newer AWT or Swing?
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What is the return type of currentTimeMillis() method?
A long type.
