Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

methods return a String that is entered from the text field in
the input dialog. The last method returns an Object selected from
a combo box or a list. The input dialog displays a combo box if
there are fewer than twenty selection values, as shown in Figure
38.14(b); it displays a list if there are twenty or more
selection values, as shown in Figure 38.14(c).
(a) text field (b) combo box (c) list
Figure 38.14
(a) When creating an input dialog without specifying selection values,
the input dialog displays a text field for data entry. (b) When
creating an input dialog with selection values, the input dialog
displays a combo box if there are fewer than twenty selection values.
(c) When creating an input dialog with selection values, the input
dialog displays a list if there are twenty or more selection values.
NOTE
The showInputDialog method does not have the optionType
parameter. The buttons for input dialog are not
configurable. The OK and Cancel buttons are always used.
38.6.4 Option Dialogs
An option dialog allows you to create custom buttons. You can
create an option dialog using the following method:
public static int showOptionDialog(Component parentComponent,
Object message,
String title,
int optionType,
int messageType,
Icon icon,
Object[] options,
Object initialValue)
The buttons are specified using the options parameter. The
initialValue parameter allows you to specify a button to receive
initial focus. The showOptionDialog method returns an int value
indicating the button that was activated. For example, here is
the code that creates an option dialog, as shown in Figure 38.15:
int value =
JOptionPane.showOptionDialog(null, "Select a button",
"Option Dialog", JOptionPane.DEFAULT_OPTION,
JOptionPane.PLAIN_MESSAGE, null,
new Object[]{"Button 0", "Button 1", "Button 2"}, "Button 1");
Figure 38.15
The option dialog displays the custom buttons.
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