Java Glossary : JOptionPane

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JOptionPane

Used in Swing for simple pop-up modal dialog boxes to interact with the user, sort of a streamlined JDialog to handle common cases.

Dialog is the AWT equivalent of JoptionPane.

documentation on JOptionPane : available:

on the web at java.Sun.com
on J: in the JDK 1.4.2_04: J:\j2sdk1.4.2_04\docs\api\javax\swing\JOptionPane.html
on J: in the JDK 1.5 beta: J:\Program Files\Java\j2sdk1.5.0\docs\api\javax\swing\JOptionPane.html

Here are some typical examples:

// sample use of showConfirmDialog
import javax.swing.JOptionPane;
...
int answer = JOptionPane.showConfirmDialog ( this, "Do you really want to shutdown everything?" );
if ( answer == JOptionPane.YES_OPTION )
   {
   shutdown();
   }

// sample use of JOptionPane.showInputDialog
import javax.swing.JOptionPane;

String constellationName = (String)JOptionPane.showInputDialog(
                                                              this,
                                                              "Enter unique new constellation name:",
                                                              "New Constellation",
                                                              JOptionPane.QUESTION_MESSAGE,
                                                              null /* icon */,
                                                              null /* possibilities */,
                                                              null /* default */ );

// sample use of JOptionPane.showMessageDialog
import javax.swing.JOptionPane;

JOptionPane.showMessageDialog( this,
                               "That name is already taken.",
                               "Duplicate Name",
                               JOptionPane.ERROR_MESSAGE );

Finally, there is showOptionDialog: the Grand Unification of the above three, which I have not shown.

JDialog ¤ Swing

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