javax.swing
Class JOptionPane

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.JOptionPane

All Implemented Interfaces:

Accessible, ImageObserver, MenuContainer, Serializable

public class JOptionPane

extends JComponent

implements Accessible

JOptionPane makes it easy to pop up a standard dialog box that prompts users for a value or informs them of something. For information about using JOptionPane, see How to Make Dialogs, a section in The Java Tutorial.

While the JOptionPane class may appear complex because of the large number of methods, almost all uses of this class are one-line calls to one of the static showXxxDialog methods shown below:

showConfirmDialog	Asks a confirming question, like yes/no/cancel.
showInputDialog	Prompt for some input.
showMessageDialog	Tell the user about something that has happened.
showOptionDialog	The Grand Unification of the above three.

Each of these methods also comes in a showInternalXXX flavor, which uses an internal frame to hold the dialog box (see JInternalFrame). Multiple convenience methods have also been defined -- overloaded versions of the basic methods that use different parameter lists.

All dialogs are modal. Each showXxxDialog method blocks the current thread until the user's interaction is complete.

icon	message
	input value
option buttons

The basic appearance of one of these dialog boxes is generally similar to the picture at the right, although the various look-and-feels are ultimatly responsible for the final result.

Parameters:
The parameters to these methods follow consistent patterns:

parentComponent

Defines the Component that is to be the parent of this dialog box. It is used in two ways: the Frame that contains it is used as the Frame parent for the dialog box, and its screen coordinates are used in the placement of the dialog box. In general, the dialog box is placed just below the component. This parameter may be null, in which case a default Frame is used as the parent, and the dialog will be centered on the screen (depending on the L&F).

message

A descriptive message to be placed in the dialog box. In the most common usage, message is just a String or String constant. However, the type of this parameter is actually Object. Its interpretation depends on its type:

Object[]

An array of objects is interpreted as a series of messages (one per object) arranged in a vertical stack. The interpretation is recursive -- each object in the array is interpreted according to its type.

Component

The Component is displayed in the dialog.

Icon

The Icon is wrapped in a JLabel and displayed in the dialog.

others

The object is converted to a String by calling its toString method. The result is wrapped in a JLabel and displayed.

messageType

Defines the style of the message. The Look and Feel manager may lay out the dialog differently depending on this value, and will often provide a default icon. The possible values are:

• ERROR_MESSAGE
• INFORMATION_MESSAGE
• WARNING_MESSAGE
• QUESTION_MESSAGE
• PLAIN_MESSAGE

optionType

Defines the set of option buttons that appear at the bottom of the dialog box:

• DEFAULT_OPTION
• YES_NO_OPTION
• YES_NO_CANCEL_OPTION
• OK_CANCEL_OPTION

You aren't limited to this set of option buttons. You can provide any buttons you want using the options parameter.

options

A more detailed description of the set of option buttons that will appear at the bottom of the dialog box. The usual value for the options parameter is an array of Strings. But the parameter type is an array of Objects. A button is created for each object depending on its type:

Component

The component is added to the button row directly.

Icon

A JButton is created with this as its label.

other

The Object is converted to a string using its toString method and the result is used to label a JButton.

icon

A decorative icon to be placed in the dialog box. A default value for this is determined by the messageType parameter.

title

The title for the dialog box.

initialValue

The default selection (input value).

When the selection is changed, setValue is invoked, which generates a PropertyChangeEvent.

If a JOptionPane has configured to all input setWantsInput the bound property JOptionPane.INPUT_VALUE_PROPERTY can also be listened to, to determine when the user has input or selected a value.

When one of the showXxxDialog methods returns an integer, the possible values are:

     YES_OPTION,
     NO_OPTION,
     CANCEL_OPTION,
     OK_OPTION, or
     CLOSED_OPTION.
 

Examples:

Show an error dialog that displays the message, 'alert':

JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);

Show an internal information dialog with the message, 'information':

JOptionPane.showInternalMessageDialog(frame, "information",

"information", JOptionPane.INFORMATION_MESSAGE);

Show an information panel with the options yes/no and message 'choose one':

JOptionPane.showConfirmDialog(null,

"choose one", "choose one", JOptionPane.YES_NO_OPTION);

Show an internal information dialog with the options yes/no/cancel and message 'please choose one' and title information:

JOptionPane.showInternalConfirmDialog(frame,

"please choose one", "information",

JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);

Show a warning dialog with the options OK, CANCEL, title 'Warning', and message 'Click OK to continue':

Object[] options = { "OK", "CANCEL" };
JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning",

JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,

null, options, options[0]);

Show a dialog asking the user to type in a String:

String inputValue = JOptionPane.showInputDialog("Please input a value");

Show a dialog asking the user to select a String:

Object[] possibleValues = { "First", "Second", "Third" };
Object selectedValue = JOptionPane.showInputDialog(null,

"Choose one", "Input",

JOptionPane.INFORMATION_MESSAGE, null,

possibleValues, possibleValues[0]);

Direct Use:
To create and use an JOptionPane directly, the standard pattern is roughly as follows:

     JOptionPane pane = new JOptionPane(arguments);
     pane.set.Xxxx(...); // Configure
     JDialog dialog = pane.createDialog(parentComponent, title);
     dialog.show();
     Object selectedValue = pane.getValue();
     if(selectedValue == null)
       return CLOSED_OPTION;
     //If there is not an array of option buttons:
     if(options == null) {
       if(selectedValue instanceof Integer)
          return ((Integer)selectedValue).intValue();
       return CLOSED_OPTION;
     }
     //If there is an array of option buttons:
     for(int counter = 0, maxCounter = options.length;
        counter < maxCounter; counter++) {
        if(options[counter].equals(selectedValue))
        return counter;
     }
     return CLOSED_OPTION;
 

For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the JOptionPane key assignments.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. A future release of Swing will provide support for long term persistence.

See Also:

JInternalFrame, Serialized Form

Inner Class Summary

protected class

JOptionPane.AccessibleJOptionPane JOptionPane.AccessibleJOptionPane This class implements accessibility support for the JOptionPane class. It provides an implementation of the Java Accessibility API appropriate to option pane user-interface elements. Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. A future release of Swing will provide support for long term persistence.

Inner classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Inner classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

Component.AccessibleAWTComponent

Field Summary

static int	CANCEL_OPTION copy-> CANCEL_OPTION Return value from class method if CANCEL is chosen.
static int	CLOSED_OPTION copy-> CLOSED_OPTION Return value from class method if user closes window without selecting anything, more than likely this should be treated as either a CANCEL_OPTION or NO_OPTION.
static int	DEFAULT_OPTION copy-> DEFAULT_OPTION Type meaning Look and Feel should not supply any options -- only use the options from the JOptionPane.
static int	ERROR_MESSAGE copy-> ERROR_MESSAGE Used for error messages.
protected Icon	icon copy-> icon Icon used in pane.
static String	ICON_PROPERTY copy-> ICON_PROPERTY Bound property name for icon.
static int	INFORMATION_MESSAGE copy-> INFORMATION_MESSAGE Used for information messages.
static String	INITIAL_SELECTION_VALUE_PROPERTY copy-> INITIAL_SELECTION_VALUE_PROPERTY Bound property name for initialSelectionValue.
static String	INITIAL_VALUE_PROPERTY copy-> INITIAL_VALUE_PROPERTY Bounds property name for initialValue.
protected Object	initialSelectionValue copy-> initialSelectionValue Initial value to select in selectionValues.
protected Object	initialValue copy-> initialValue Value that should be initialy selected in options.
static String	INPUT_VALUE_PROPERTY copy-> INPUT_VALUE_PROPERTY Bound property name for inputValue.
protected Object	inputValue copy-> inputValue Value the user has input.
protected Object	message copy-> message Message to display.
static String	MESSAGE_PROPERTY copy-> MESSAGE_PROPERTY Bound property name for message.
static String	MESSAGE_TYPE_PROPERTY copy-> MESSAGE_TYPE_PROPERTY Bounds property name for type.
protected int	messageType copy-> messageType Message type.
static int	NO_OPTION copy-> NO_OPTION Return value from class method if NO is chosen.
static int	OK_CANCEL_OPTION copy-> OK_CANCEL_OPTION Type used for showConfirmDialog.
static int	OK_OPTION copy-> OK_OPTION Return value form class method if OK is chosen.
static String	OPTION_TYPE_PROPERTY copy-> OPTION_TYPE_PROPERTY Bound property name for optionType.
protected Object[]	options copy-> options Options to display to the user.
static String	OPTIONS_PROPERTY copy-> OPTIONS_PROPERTY Bounds property namer for option.
protected int	optionType copy-> optionType Option type, one of DEFAULT_OPTION, YES_NO_OPTION, YES_NO_CANCEL_OPTION or OK_CANCEL_OPTION.
static int	PLAIN_MESSAGE copy-> PLAIN_MESSAGE No icon is used.
static int	QUESTION_MESSAGE copy-> QUESTION_MESSAGE Used for questions.
static String	SELECTION_VALUES_PROPERTY copy-> SELECTION_VALUES_PROPERTY Bound property name for selectionValues.
protected Object[]	selectionValues copy-> selectionValues Array of values the user can choose from. Look and feel will provide the UI component to choose this from.
static Object	UNINITIALIZED_VALUE copy-> UNINITIALIZED_VALUE Indicates that the user has not yet selected a value.
protected Object	value copy-> value Currently selected value, will be a valid option, or UNINITIALIZED_VALUE or null.
static String	VALUE_PROPERTY copy-> VALUE_PROPERTY Bounds property name for value.
static String	WANTS_INPUT_PROPERTY copy-> WANTS_INPUT_PROPERTY Bound property name for wantsInput.
protected boolean	wantsInput copy-> wantsInput If true, a UI widget will be provided to the user to get input.
static int	WARNING_MESSAGE copy-> WARNING_MESSAGE Used for warning messages.
static int	YES_NO_CANCEL_OPTION copy-> YES_NO_CANCEL_OPTION Type used for showConfirmDialog.
static int	YES_NO_OPTION copy-> YES_NO_OPTION Type used for showConfirmDialog.
static int	YES_OPTION copy-> YES_OPTION Return value from class method if YES is chosen.

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

JOptionPane
copy-> new JOptionPane()
copy-> <JOptionPane var> = new JOptionPane();

Creates a JOptionPane with a test message.

JOptionPane
copy-> new JOptionPane( )
copy-> <JOptionPane var> = new JOptionPane(<Object message>);

Creates a instance of JOptionPane to display a message using the plain-message message type and the default options delivered by the UI.

Parameters:

message - the Object to display

JOptionPane
copy-> new JOptionPane(, )
copy-> <JOptionPane var> = new JOptionPane(<Object message>, <int messageType>);

Creates an instance of JOptionPane to display a message with the specified message type and the default options,

Parameters:

message - the Object to display

messageType - the type of message to be displayed: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

JOptionPane
copy-> new JOptionPane(, , )
copy-> <JOptionPane var> = new JOptionPane(<Object message>, <int messageType>, <int optionType>);

Creates an instance of JOptionPane to display a message with the specified message type and options.

Parameters:

message - the Object to display

messageType - the type of message to be displayed: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

optionType - the options to display in the pane: DEFAULT_OPTION, YES_NO_OPTION, YES_NO_CANCEL_OPTION OK_CANCEL_OPTION

JOptionPane
copy-> new JOptionPane(, , , )
copy-> <JOptionPane var> = new JOptionPane(<Object message>, <int messageType>, <int optionType>, <Icon icon>);

Creates an instance of JOptionPane to display a message with the specified message type, options, and icon.

Parameters:

message - the Object to display

messageType - the type of message to be displayed: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

optionType - the options to display in the pane: DEFAULT_OPTION, YES_NO_OPTION, YES_NO_CANCEL_OPTION OK_CANCEL_OPTION

icon - the Icon image to display

JOptionPane
copy-> new JOptionPane(, , , , )
copy-> <JOptionPane var> = new JOptionPane(<Object message>, <int messageType>, <int optionType>, <Icon icon>, <Object[] options>);

Creates an instance of JOptionPane to display a message with the specified message type, icon, and options. None of the options is initially selected.

The options objects should contain either instances of Components, (which are added directly) or Strings (which are wrapped in a JButton). If you provide Components, you must ensure that when the Component is clicked it messages setValue in the created JOptionPane.

Parameters:

message - the Object to display

messageType - the type of message to be displayed: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

optionType - the options to display in the pane: DEFAULT_OPTION, YES_NO_OPTION, YES_NO_CANCEL_OPTION OK_CANCEL_OPTION; only meaningful if the options parameter is null

icon - the Icon image to display

options - the choices the user can select

JOptionPane
copy-> new JOptionPane(, , , , , )
copy-> <JOptionPane var> = new JOptionPane(<Object message>, <int messageType>, <int optionType>, <Icon icon>, <Object[] options>, <Object initialValue>);

Creates an instance of JOptionPane to display a message with the specified message type, icon, and options, with the initially-selected option specified.

Parameters:

message - the Object to display

messageType - the type of message to be displayed: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

optionType - the options to display in the pane: DEFAULT_OPTION, YES_NO_OPTION, YES_NO_CANCEL_OPTION OK_CANCEL_OPTION; only meaningful if the options parameter is null

icon - the Icon image to display

options - the choices the user can select

initialValue - the choice that is initially selected

Method Summary

JDialog	createDialog(Component parentComponent, String title) copy-> .createDialog(, ) copy-> <JDialog var>=<JOptionPane>.createDialog(<Component parentComponent>, <String title>); Creates and returns a new JDialog wrapping this centered on the parentComponent in the parentComponent's frame. title is the title of the returned dialog. The returned JDialog will be set up such that once it is closed, or the user clicks on the OK button, the dialog will be disposed and closed. Parameters: parentComponent - determines the frame in which the dialog is displayed; if the parentComponent has no Frame, a default Frame is used title - the title string for the dialog Returns: a new JDialog containing this instance
JInternalFrame	createInternalFrame(Component parentComponent, String title) copy-> .createInternalFrame(, ) copy-> <JInternalFrame var>=<JOptionPane>.createInternalFrame(<Component parentComponent>, <String title>); Creates and returns an instance of JInternalFrame. The internal frame is created with the specified title, and wrapping the JOptionPane. The returned JInternalFrame is added to the JDesktopPane ancestor of parentComponent, or components parent if one its ancestors isn't a JDesktopPane, or if parentComponent doesn't have a parent then a RuntimeException is thrown. Parameters: parentComponent - the parent Component for the internal frame title - the String to display in the frame's title bar Returns: a JInternalFrame containing a JOptionPane Throws: RuntimeException - if parentComponent does not have a valid parent
AccessibleContext	getAccessibleContext() copy-> .getAccessibleContext() copy-> <AccessibleContext var>=<JOptionPane>.getAccessibleContext(); Gets the AccessibleContext associated with this JOptionPane. For option panes, the AccessibleContext takes the form of an AccessibleJOptionPane. A new AccessibleJOptionPane instance is created if necessary. Specified by: getAccessibleContext in interface Accessible Overrides: getAccessibleContext in class JComponent Returns: an AccessibleJOptionPane that serves as the AccessibleContext of this AccessibleJOptionPane
static JDesktopPane	getDesktopPaneForComponent(Component parentComponent) copy-> JOptionPane.getDesktopPaneForComponent( ) copy-> <JDesktopPane var>=JOptionPane.getDesktopPaneForComponent(<Component parentComponent>); Returns the specified component's desktop pane. Parameters: parentComponent - the Component to check for a desktop Returns: the JDesktopPane that contains the component, or null if the component is null or does not have an ancestor that is a JInternalFrame
static Frame	getFrameForComponent(Component parentComponent) copy-> JOptionPane.getFrameForComponent( ) copy-> <Frame var>=JOptionPane.getFrameForComponent(<Component parentComponent>); Returns the specified component's Frame. Parameters: parentComponent - the Component to check for a Frame Returns: the Frame that contains the component, or the default frame if the component is null, or does not have a valid Frame parent
Icon	getIcon() copy-> .getIcon() copy-> <Icon var>=<JOptionPane>.getIcon(); Returns the icon this pane displays. Returns: the Icon that is displayed See Also: setIcon(javax.swing.Icon)
Object	getInitialSelectionValue() copy-> .getInitialSelectionValue() copy-> <Object var>=<JOptionPane>.getInitialSelectionValue(); Returns the initial-selection value. Returns: the initially selected value See Also: setInitialSelectionValue(java.lang.Object), setSelectionValues(java.lang.Object[])
Object	getInitialValue() copy-> .getInitialValue() copy-> <Object var>=<JOptionPane>.getInitialValue(); Returns the initial value. Returns: the Object that gets the initial keyboard focus See Also: setInitialValue(java.lang.Object)
Object	getInputValue() copy-> .getInputValue() copy-> <Object var>=<JOptionPane>.getInputValue(); Returns the value the user has input, if wantsInput is true. Returns: the Object the user specified, if it was one of the objects, or a String if it was a value typed into a field See Also: setSelectionValues(java.lang.Object[]), setWantsInput(boolean), setInputValue(java.lang.Object)
int	getMaxCharactersPerLineCount() copy-> .getMaxCharactersPerLineCount() copy-> <int var>=<JOptionPane>.getMaxCharactersPerLineCount(); Returns the maximum number of characters to place on a line in a message. Default is to return Integer.MAX_VALUE. The value can be changed by overriding this method in a subclass. Returns: an integer giving the maximum number of characters on a line
Object	getMessage() copy-> .getMessage() copy-> <Object var>=<JOptionPane>.getMessage(); Returns the message-object this pane displays. Returns: the Object that is displayed See Also: setMessage(java.lang.Object)
int	getMessageType() copy-> .getMessageType() copy-> <int var>=<JOptionPane>.getMessageType(); Returns the message type. Returns: an integer specifying the message type See Also: setMessageType(int)
Object[]	getOptions() copy-> .getOptions() copy-> <Object var>=<JOptionPane>.getOptions(); Returns the choices the user can make. Returns: the array of Objects that give the user's choices See Also: setOptions(java.lang.Object[])
int	getOptionType() copy-> .getOptionType() copy-> <int var>=<JOptionPane>.getOptionType(); Returns the type of options that are displayed. Returns: an integer specifying the user-selectable options See Also: setOptionType(int)
static Frame	getRootFrame() copy-> JOptionPane.getRootFrame() copy-> <Frame var>=JOptionPane.getRootFrame(); Returns the Frame to use for the class methods in which a frame is not provided. Returns: the default Frame to use
Object[]	getSelectionValues() copy-> .getSelectionValues() copy-> <Object var>=<JOptionPane>.getSelectionValues(); Returns the selection values. Parameters: return - the array of Objects the user can select See Also: setSelectionValues(java.lang.Object[])
OptionPaneUI	getUI() copy-> .getUI() copy-> <OptionPaneUI var>=<JOptionPane>.getUI(); Returns the UI object which implements the L&F for this component. Returns: the OptionPaneUI object
String	getUIClassID() copy-> .getUIClassID() copy-> <String var>=<JOptionPane>.getUIClassID(); Returns the name of the UI class that implements the L&F for this component. Overrides: getUIClassID in class JComponent Returns: the string "OptionPaneUI" See Also: JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)
Object	getValue() copy-> .getValue() copy-> <Object var>=<JOptionPane>.getValue(); Returns the value the user has selected. UNINITIALIZED_VALUE implies the user has not yet made a choice, null means the user closed the window with out choosing anything. Otherwise the returned value will be one of the options defined in this object. Returns: the Object chosen by the user, UNINITIALIZED_VALUE if the user has not yet made a choice, or null if the user closed the window without making a choice See Also: setValue(java.lang.Object)
boolean	getWantsInput() copy-> .getWantsInput() copy-> <boolean var>=<JOptionPane>.getWantsInput(); Returns true if a parentComponent will be provided for the user to input. Returns: true if a parentComponent will be provided See Also: setWantsInput(boolean)
protected String	paramString() copy-> .paramString() copy-> <String var>=<JOptionPane>.paramString(); Returns a string representation of this JOptionPane. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null. Overrides: paramString in class JComponent Returns: a string representation of this JOptionPane
void	selectInitialValue() copy-> .selectInitialValue() copy-> <JOptionPane>.selectInitialValue(); Requests that the initial value be selected, which will set focus to the initial value. This method should be invoked after the window containing the option pane is made visible.
void	setIcon(Icon newIcon) copy-> .setIcon( ) copy-> <JOptionPane>.setIcon(<Icon newIcon>); Sets the icon to display. If non-null, the Look and Feel does not provide an icon. Parameters: icon - the Icon to display See Also: getIcon()
void	setInitialSelectionValue(Object newValue) copy-> .setInitialSelectionValue( ) copy-> <JOptionPane>.setInitialSelectionValue(<Object newValue>); Sets the initial selection value. Only used if wantsInput is true. Parameters: newValue - the initially selected value See Also: setSelectionValues(java.lang.Object[]), getInitialSelectionValue()
void	setInitialValue(Object newInitialValue) copy-> .setInitialValue( ) copy-> <JOptionPane>.setInitialValue(<Object newInitialValue>); Sets the initial value that is to be enabled -- the Component that has the focus when the pane is initially displayed. Parameters: newInitialValue - the Object that gets the initial keyboard focus See Also: getInitialValue()
void	setInputValue(Object newValue) copy-> .setInputValue( ) copy-> <JOptionPane>.setInputValue(<Object newValue>); Sets the user's input-value. Parameters: newValue - the Object used to initialized the value that the user specified (usually in a text field) See Also: setSelectionValues(java.lang.Object[]), setWantsInput(boolean), getInputValue()
void	setMessage(Object newMessage) copy-> .setMessage( ) copy-> <JOptionPane>.setMessage(<Object newMessage>); Sets the option pane's message-object. Parameters: newMessage - the Object to display See Also: getMessage()
void	setMessageType(int newType) copy-> .setMessageType( ) copy-> <JOptionPane>.setMessageType(<int newType>); Sets the option pane's message type. The message type is used by the Look and Feel to determine the icon to display (if not supplied) as well as potentially how to lay out the parentComponent. Parameters: newType - an integer specifying the kind of message to display: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE Throws: RuntimeException - if newType is not one of the legal values listed above See Also: getMessageType()
void	setOptions(Object[] newOptions) copy-> .setOptions( ) copy-> <JOptionPane>.setOptions(<Object[] newOptions>); Sets the options this pane displays. If an element in newOptions is a Component it is added directly to the pane, otherwise a button is created for the element. Parameters: newOptions - an array of Objects that create the buttons the user can click on, or arbitrary Components to add to the pane See Also: getOptions()
void	setOptionType(int newType) copy-> .setOptionType( ) copy-> <JOptionPane>.setOptionType(<int newType>); Sets the options to display. The option type is used by the Look and Feel to determine what buttons to show (unless options are supplied). Parameters: newType - an integer specifying the options the L&F is to display: DEFAULT_OPTION, YES_NO_OPTION, YES_NO_CANCEL_OPTION, or OK_CANCEL_OPTION Throws: RuntimeException - if newType is not one of the legal values listed above See Also: getOptionType(), setOptions(java.lang.Object[])
static void	setRootFrame(Frame newRootFrame) copy-> JOptionPane.setRootFrame( ) copy-> JOptionPane.setRootFrame(<Frame newRootFrame>); Sets the frame to use for class methods in which a frame is not provided. Parameters: newRootFrame - the default Frame to use
void	setSelectionValues(Object[] newValues) copy-> .setSelectionValues( ) copy-> <JOptionPane>.setSelectionValues(<Object[] newValues>); Sets the selection values for a pane that provides the user with a list of items to choose from. (The UI provides a widget for choosing one of the values.) Sets wantsInput to true. Use setInitialSelectionValue to specify the initially-chosen value. After the pane as been enabled, inputValue is set to the value the user has selected. Parameters: newValues - an array of Objects the user to be displayed (usually in a list or combo-box) from which the user can make a selection See Also: setWantsInput(boolean), setInitialSelectionValue(java.lang.Object), getSelectionValues()
void	setUI(OptionPaneUI ui) copy-> .setUI( ) copy-> <JOptionPane>.setUI(<OptionPaneUI ui>); Sets the UI object which implements the L&F for this component. Parameters: ui - the OptionPaneUI L&F object See Also: UIDefaults.getUI(javax.swing.JComponent)
void	setValue(Object newValue) copy-> .setValue( ) copy-> <JOptionPane>.setValue(<Object newValue>); Sets the value the user has chosen. Parameters: newValue - the chosen value See Also: getValue()
void	setWantsInput(boolean newValue) copy-> .setWantsInput( ) copy-> <JOptionPane>.setWantsInput(<boolean newValue>); If newValue is true, a parentComponent is provided to allow the user to input a value. If getSelectionValues returns a non-null the input value is one of the objects in that array. Otherwise the input value is whatever the user inputs. This is a bound property. See Also: setSelectionValues(java.lang.Object[]), setInputValue(java.lang.Object)
static int	showConfirmDialog(Component parentComponent, Object message) copy-> JOptionPane.showConfirmDialog(, ) copy-> <int var>=JOptionPane.showConfirmDialog(<Component parentComponent>, <Object message>); Brings up a modal dialog with the options Yes, No and Cancel; with the title, "Select an Option". Parameters: parentComponent - determines the Frame in which the dialog is displayed; if null, or if the parentComponent has no Frame, a default Frame is used message - the Object to display Returns: an integer indicating the option selected by the user
static int	showConfirmDialog(Component parentComponent, Object message, String title, int optionType) copy-> JOptionPane.showConfirmDialog(, , , ) copy-> <int var>=JOptionPane.showConfirmDialog(<Component parentComponent>, <Object message>, <String title>, <int optionType>); Brings up a modal dialog where the number of choices is determined by the optionType parameter. Parameters: parentComponent - determines the Frame in which the dialog is displayed; if null, or if the parentComponent has no Frame, a default Frame is used message - the Object to display title - the title string for the dialog optionType - an int designating the options available on the dialog: YES_NO_OPTION, or YES_NO_CANCEL_OPTION Returns: an int indicating the option selected by the user
static int	showConfirmDialog(Component parentComponent, Object message, String title,