这个压缩包里的都是超级经典的java例子

				
				
				
				Setting the Location of a Tool Tip (Java Developers Almanac Example)
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				The Java Developers Almanac 1.4
				
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				    javax.swing
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				        Tool Tips
				             [7 examples]
				            
				
				  e844. Setting the Location of a Tool Tip
				
				By default, when a tool tip of a component appears, its northwest
				corner appears at the same x-coordinate as the cursor and 20 pixels
				lower than the y-coordinate of the cursor. To change this default
				location for a component, the
				getToolTipLocation() method of the component must be overridden.
				
				
				    // Set the location of the tool tip such that its nw corner
				    // coincides with the nw corner of the button
				    JButton button = new JButton("My Button") {
				        public Point getToolTipLocation(MouseEvent event) {
				            return new Point(0, 0);
				        }
				    };
				    
				    // Set the location of the tool tip such that its nw corner
				    // coincides with the bottom center of the button
				    button = new JButton("My Button") {
				        public Point getToolTipLocation(MouseEvent event) {
				            return new Point(getWidth()/2, getHeight());
				        }
				    };
				    
				    // Use the default tool tip location
				    button = new JButton("My Button") {
				        public Point getToolTipLocation(MouseEvent event) {
				            return null;
				        }
				    };
				    
				    // Set the tool tip text
				    button.setToolTipText("aString");
				
				
				
				
				             Related Examples
				
				
				
				
				e843. 
				    Setting a Tool Tip
				
				
				
				e845. 
				    Enabling and Disabling Tool Tips
				
				
				
				e846. 
				    Making Tool Tips Appear Immediately
				
				
				
				e847. 
				    Making Tool Tips Remain Visible
				
				
				
				e848. 
				    Showing Multiple Lines in a Tool Tip
				
				
				
				e849. 
				    Showing an Image in a Tool Tip
				
				
				
				
				
				
				
				
				        See also: 
				
				    Actions
				  
				
				
				    JButton
				  
				
				
				    JCheckBox
				  
				
				
				    JComboBox
				  
				
				
				    JDesktop and JInternalFrame
				  
				
				
				    JFrame, JWindow, JDialog
				  
				
				
				    JLabel
				  
				
				
				    JList
				  
				
				
				    JProgressBar
				  
				
				
				    JRadioButton
				  
				
				
				    JScrollPane
				  
				
				
				    JSlider
				  
				
				
				    JSpinner
				  
				
				
				    JSplitPane
				  
				
				
				    JTabbedPane
				  
				
				
				    JToolBar
				  
				
				
				    Keystrokes and Input Maps
				  
				
				
				    Layout
				  
				
				
				    Look and Feel
				  
				
				
				    Menus
				  
				
				
				    Progress Monitor
				  
				
				
				    The Screen
				  
				
				
				    UI Default Values
				  
				
				
				
				
				
				
				
				
				
				© 2002 Addison-Wesley.