Java Foundation Classes in a Nutshell

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by David Flanagan, Paula FergusonDavid Flanagan

     

 

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Java Foundation Classes in a Nutshell is an indispensable quick reference for Java programmers who are writing applications that use graphics or graphical user interfaces. The author of the bestsellingJava in a Nutshell has written fast-paced introductions to the Java APIs that comprise the Java Foundation Classes (JFC), such as the Swing GUI

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3.3 Actions

javax.swing.Action interface Action interface ActionListener interface, so it actionPerformed() method. It is this Action object also has an arbitrary set of Action object has an enabled setEnabled() method that allows "Cut" Action object directly to a JMenu or JToolBar JMenuItem or JButton to JMenuItem or JButton JMenuBar or JToolBar to JMenuBar and JToolBar display an action's textual name and its Action interface helps you Action objects directly. Since Action is a kind of ActionListener, you must define an individual Action that implements the actionPerformed() method for each of your AbstractAction class is actionPerformed() method.

3.4 Tooltips

tooltip: setToolTipText() method. This toolTipText property is inherited from JComponent, so it is shared by all Swing enabled ToolTipManager object. The

 ToolTipManager.sharedInstance().setEnabled(false);

3.5 Timers

javax.swing.Timer object generates single ActionEvent events at time Timer Timer object that Timer. Timer objects just like regular Timer has addActionListener() method that you can use initialDelay property specifies how many Timer waits before firing its first ActionEvent. If the repeats true, Timer generates a new ActionEvent each time delay milliseconds passes. delay coalesce true, Timer combines ActionEvent, rather than letting a queue of

3.6 The Event Dispatch Thread

SwingUtilities.invokeLater() and SwingUtilities.invokeAndWait(). You pass a Runnable object to each method, and the run() method of this object is invokeLater() run() invokeAndWait() does run() method has completed. invokeLater() and invokeAndWait() methods do not run Runnable object right away. Instead, each Runnable object Runnable object is extracted from the event run() method. This means that invokeLater() provides a useful way to defer the

3.7 Client Properties

JComponent includes a hashtable in which it can putClientProperty() and getClientProperty() methods. Since these are JComponent methods, they are inherited by all String object. JMenu JMenuItem components. Each ActionListener setActionCommand() method (inherited from AbstractButton) to associate a string with each JMenuItem components. Then the action String in order to decide how to JMenuItem.