These examples demonstrates two techniques with tool tips.
ButtonToolTips.java shows how you can add a tool tip to
a button. ToolTips.java implement
a JPanel subclass that displays custom tool tips based
on the mouse location.
Swing in Windows
Simple_Window.java is an application that uses a JFrame to display a message to the user.
Window Events
Windows.java uses a WindowListener to handle the close box. The
listener also prints messages as WindowListener methods are called.
MeanWindow.java uses a WindowListener to handle the close box based
on a random decision.
Swing in Applets
Simple_Applet.java defines a subclass of JApplet that displays
a message to the user.