February 2014
Beginner
1248 pages
62h 25m
English
Content preview from Java™ How To Program (Early Objects), Tenth Edition
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JOptionPane Class static Method showMessagDialog
Line 3 indicates that the program uses class JOptionPane from package javax.swing. This package contains many classes that help you create graphical user interfaces (GUIs). GUI components facilitate data entry by a program’s user and presentation of outputs to the user. Line 10 calls JOptionPane method showMessageDialog to display a dialog box containing a message. The method requires two arguments. The first helps the Java app determine where to position the dialog box. A dialog is typically displayed from a GUI app with its own window. The first argument refers to that window (known as the parent window) and causes the dialog to appear centered over the app’s window. If the first argument is ...
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