CEE 5110 Lecture Notes - Lecture 22: Layout Manager
10 Apr 2016
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Lecture - 22
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Listeners (cont’d)
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actionPerformed (or another listener method) takes a corresponding type of
event as a parameter.
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Event objects have useful methods. For example, getSource returns the object
that produced this event.
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A MouseEvent has methods getX, getY.
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GUI Components Review
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Java Methods Appendix C contains brief summaries of several Swing
components, their constructors, methods, and events.
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For a complete specification refer to the Java Swing API docs.
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JLabel
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JButton
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JCheckBox
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etc.
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Layouts
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A layout manager is a strategy for placing components on the content pane or
another component (usually a panel).
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In Java, the content pane and any GUI component is a Container.
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A layout is chosen by calling the container’s setLayout method.
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Layouts (cont’d)
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Layouts are used to achieve some degree of platform independence and
scalability.
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awt/Swing support several layout managers. Here we consider four:
FlowLayout
GridLayout
BorderLayout
BoxLayout
