|
FlexDoc/Javadoc 2.0 Demo Java Doc |
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:
Method Name | Description |
---|---|
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. |
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 caller until the user's interaction is complete.
icon | message |
input value | |
option buttons |
ComponentOrientation
property.
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: theFrame
that contains it is used as theFrame
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 benull
, in which case a defaultFrame
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
orString
constant. However, the type of this parameter is actuallyObject
. 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 aJLabel
and displayed in the dialog.- others
- The object is converted to a
String
by calling itstoString
method. The result is wrapped in aJLabel
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:
You aren't limited to this set of option buttons. You can provide any buttons you want using the options parameter.
DEFAULT_OPTION
YES_NO_OPTION
YES_NO_CANCEL_OPTION
OK_CANCEL_OPTION
- 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
String
s. But the parameter type is an array ofObjects
. 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 itstoString
method and the result is used to label aJButton
.- 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
CLOSED_OPTION
JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);
JOptionPane.showInternalMessageDialog(frame, "information", "information", JOptionPane.INFORMATION_MESSAGE);
JOptionPane.showConfirmDialog(null, "choose one", "choose one", JOptionPane.YES_NO_OPTION);
JOptionPane.showInternalConfirmDialog(frame, "please choose one", "information", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);
Object[] options = { "OK", "CANCEL" }; JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
String inputValue = JOptionPane.showInputDialog("Please input a value");
Object[] possibleValues = { "First", "Second", "Third" };
Object selectedValue = JOptionPane.showInputDialog(null, "Choose one", "Input", JOptionPane.INFORMATION_MESSAGE, null, possibleValues, possibleValues[0]);
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;
Warning: Swing is not thread safe. For more information see Swing's Threading Policy.
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. As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans
package.
Please see XMLEncoder.
Nested Class Summary |
||
protected class |
This class implements accessibility support for the
JOptionPane class. |
Nested classes/interfaces inherited from class javax.swing.JComponent |
Nested classes/interfaces inherited from class java.awt.Container |
Nested classes/interfaces inherited from class java.awt.Component |
Field Summary |
||
static final int |
Return value from class method if CANCEL is chosen.
|
|
static final int |
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 final int |
Type meaning Look and Feel should not supply any options -- only
use the options from the
JOptionPane . |
|
static final int |
Used for error messages.
|
|
protected Icon |
Icon used in pane.
|
|
static final String |
Bound property name for
icon . |
|
static final int |
Used for information messages.
|
|
static final String |
Bound property name for
initialSelectionValue . |
|
static final String |
Bound property name for
initialValue . |
|
protected Object |
Initial value to select in
selectionValues . |
|
protected Object |
Value that should be initially selected in
options . |
|
static final String |
Bound property name for
inputValue . |
|
protected Object |
Value the user has input.
|
|
protected Object |
Message to display.
|
|
static final String |
Bound property name for
message . |
|
static final String |
Bound property name for
type . |
|
protected int |
Message type.
|
|
static final int |
Return value from class method if NO is chosen.
|
|
static final int |
Type used for
showConfirmDialog . |
|
static final int |
Return value form class method if OK is chosen.
|
|
static final String |
Bound property name for
optionType . |
|
protected Object[] |
Options to display to the user.
|
|
static final String |
Bound property name for
option . |
|
protected int |
Option type, one of
DEFAULT_OPTION ,
YES_NO_OPTION ,
YES_NO_CANCEL_OPTION or
OK_CANCEL_OPTION . |
|
static final int |
No icon is used.
|
|
static final int |
Used for questions.
|
|
static final String |
Bound property name for
selectionValues . |
|
protected Object[] |
Array of values the user can choose from.
|
|
static final Object |
Indicates that the user has not yet selected a value.
|
|
protected Object |
Currently selected value, will be a valid option, or
UNINITIALIZED_VALUE or null . |
|
static final String |
Bound property name for
value . |
|
static final String |
Bound property name for
wantsInput . |
|
protected boolean |
If true, a UI widget will be provided to the user to get input.
|
|
static final int |
Used for warning messages.
|
|
static final int |
Type used for
showConfirmDialog . |
|
static final int |
Type used for
showConfirmDialog . |
|
static final int |
Return value from class method if YES is chosen.
|
Fields inherited from class javax.swing.JComponent |
Fields inherited from class java.awt.Component |
Fields inherited from interface java.awt.image.ImageObserver |
Constructor Summary |
||
Creates a
JOptionPane with a test message. |
||
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. |
||
JOptionPane(Object message, int messageType)
Creates an instance of
JOptionPane to display a message
with the specified message type and the default options, |
||
JOptionPane(Object message, int messageType, int optionType)
Creates an instance of
JOptionPane to display a message
with the specified message type and options. |
||
Creates an instance of
JOptionPane to display a message
with the specified message type, options, and icon. |
||
Creates an instance of
JOptionPane to display a message
with the specified message type, icon, and options. |
||
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. |
Method Summary |
||
Creates and returns a new
JDialog wrapping
this centered on the parentComponent
in the parentComponent 's frame. |
||
createDialog(String title)
Creates and returns a new parentless
JDialog
with the specified title. |
||
Creates and returns an instance of
JInternalFrame . |
||
Returns the
AccessibleContext associated with this JOptionPane. |
||
static JDesktopPane |
getDesktopPaneForComponent(Component parentComponent)
Returns the specified component's desktop pane.
|
|
static Frame |
getFrameForComponent(Component parentComponent)
Returns the specified component's
Frame . |
|
getIcon()
Returns the icon this pane displays.
|
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Returns the input value that is displayed as initially selected to the user.
|
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Returns the initial value.
|
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Returns the value the user has input, if
wantsInput
is true. |
||
int |
Returns the maximum number of characters to place on a line in a
message.
|
|
Returns the message-object this pane displays.
|
||
int |
Returns the message type.
|
|
Object[] |
Returns the choices the user can make.
|
|
int |
Returns the type of options that are displayed.
|
|
static Frame |
Returns the
Frame to use for the class methods in
which a frame is not provided. |
|
Object[] |
Returns the input selection values.
|
|
getUI()
Returns the UI object which implements the L&F for this component.
|
||
Returns the name of the UI class that implements the
L&F for this component.
|
||
getValue()
Returns the value the user has selected.
|
||
boolean |
Returns the value of the
wantsInput property. |
|
protected String |
Returns a string representation of this
JOptionPane . |
|
void |
Requests that the initial value be selected, which will set
focus to the initial value.
|
|
void |
Sets the icon to display.
|
|
void |
setInitialSelectionValue(Object newValue)
Sets the input value that is initially displayed as selected to the user.
|
|
void |
setInitialValue(Object newInitialValue)
Sets the initial value that is to be enabled -- the
Component
that has the focus when the pane is initially displayed. |
|
void |
setInputValue(Object newValue)
Sets the input value that was selected or input by the user.
|
|
void |
setMessage(Object newMessage)
Sets the option pane's message-object.
|
|
void |
setMessageType(int newType)
Sets the option pane's message type.
|
|
void |
setOptions(Object[] newOptions)
Sets the options this pane displays.
|
|
void |
setOptionType(int newType)
Sets the options to display.
|
|
static void |
setRootFrame(Frame newRootFrame)
Sets the frame to use for class methods in which a frame is
not provided.
|
|
void |
setSelectionValues(Object[] newValues)
Sets the input selection values for a pane that provides the user
with a list of items to choose from.
|
|
void |
setUI(OptionPaneUI ui)
Sets the UI object which implements the L&F for this component.
|
|
void |
Sets the value the user has chosen.
|
|
void |
setWantsInput(boolean newValue)
Sets the
wantsInput property. |
|
static int |
Brings up a dialog with the options Yes,
No and Cancel; with the
title, Select an Option.
|
|
static int |
Brings up a dialog where the number of choices is determined
by the
optionType parameter. |
|
static int |
showConfirmDialog(Component parentComponent, Object message, String title, int optionType, int messageType)
Brings up a dialog where the number of choices is determined
by the
optionType parameter, where the
messageType
parameter determines the icon to display. |
|
static int |
showConfirmDialog(Component parentComponent, Object message, String title, int optionType, int messageType, Icon icon)
Brings up a dialog with a specified icon, where the number of
choices is determined by the
optionType parameter. |
|
static String |
Shows a question-message dialog requesting input from the user
parented to
parentComponent . |
|
static String |
Shows a question-message dialog requesting input from the user and
parented to
parentComponent . |
|
static String |
Shows a dialog requesting input from the user parented to
parentComponent with the dialog having the title
title and message type messageType . |
|
static Object |
showInputDialog(Component parentComponent, Object message, String title, int messageType, Icon icon, Object[] selectionValues, Object initialSelectionValue)
Prompts the user for input in a blocking dialog where the
initial selection, possible selections, and all other options can
be specified.
|
|
static String |
showInputDialog(Object message)
Shows a question-message dialog requesting input from the user.
|
|
static String |
Shows a question-message dialog requesting input from the user, with
the input value initialized to
initialSelectionValue . |
|
static int |
Brings up an internal dialog panel with the options Yes, No
and Cancel; with the title, Select an Option.
|
|
static int |
Brings up a internal dialog panel where the number of choices
is determined by the
optionType parameter. |
|
static int |
showInternalConfirmDialog(Component parentComponent, Object message, String title, int optionType, int messageType)
Brings up an internal dialog panel where the number of choices
is determined by the
optionType parameter, where
the messageType parameter determines the icon to display. |
|
static int |
showInternalConfirmDialog(Component parentComponent, Object message, String title, int optionType, int messageType, Icon icon)
Brings up an internal dialog panel with a specified icon, where
the number of choices is determined by the
optionType
parameter. |
|
static String |
Shows an internal question-message dialog requesting input from
the user parented to
parentComponent . |
|
static String |
Shows an internal dialog requesting input from the user parented
to
parentComponent with the dialog having the title
title and message type messageType . |
|
static Object |
showInternalInputDialog(Component parentComponent, Object message, String title, int messageType, Icon icon, Object[] selectionValues, Object initialSelectionValue)
Prompts the user for input in a blocking internal dialog where
the initial selection, possible selections, and all other
options can be specified.
|
|
static void |
Brings up an internal confirmation dialog panel.
|
|
static void |
Brings up an internal dialog panel that displays a message
using a default icon determined by the
messageType
parameter. |
|
static void |
showInternalMessageDialog(Component parentComponent, Object message, String title, int messageType, Icon icon)
Brings up an internal dialog panel displaying a message,
specifying all parameters.
|
|
static int |
showInternalOptionDialog(Component parentComponent, Object message, String title, int optionType, int messageType, Icon icon, Object[] options, Object initialValue)
Brings up an internal dialog panel with a specified icon, where
the initial choice is determined by the
initialValue
parameter and the number of choices is determined by the
optionType parameter. |
|
static void |
Brings up an information-message dialog titled "Message".
|
|
static void |
Brings up a dialog that displays a message using a default
icon determined by the
messageType parameter. |
|
static void |
showMessageDialog(Component parentComponent, Object message, String title, int messageType, Icon icon)
Brings up a dialog displaying a message, specifying all parameters.
|
|
static int |
showOptionDialog(Component parentComponent, Object message, String title, int optionType, int messageType, Icon icon, Object[] options, Object initialValue)
Brings up a dialog with a specified icon, where the initial
choice is determined by the
initialValue parameter and
the number of choices is determined by the optionType
parameter. |
|
void |
updateUI()
Notification from the
UIManager that the L&F has changed. |
Methods inherited from class java.lang.Object |
JOptionPane
.
CANCEL_OPTION
or NO_OPTION
.
options
.DEFAULT_OPTION
,
YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
or
OK_CANCEL_OPTION
.UNINITIALIZED_VALUE
or null
.selectionValues
.public JOptionPane |
() |
JOptionPane
with a test message.public JOptionPane |
(Object message) |
JOptionPane
to display a
message using the
plain-message message type and the default options delivered by
the UI.
Object
to displaypublic JOptionPane |
(Object message, int messageType) |
JOptionPane
to display a message
with the specified message type and the default options,
Object
to display
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public JOptionPane |
JOptionPane
to display a message
with the specified message type and options.
Object
to display
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
DEFAULT_OPTION
, YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
OK_CANCEL_OPTION
public JOptionPane |
JOptionPane
to display a message
with the specified message type, options, and icon.
Object
to display
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
DEFAULT_OPTION
, YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
OK_CANCEL_OPTION
Icon
image to displaypublic JOptionPane |
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
Component
s, (which are added directly) or
Strings
(which are wrapped in a JButton
).
If you provide Component
s, you must ensure that when the
Component
is clicked it messages setValue
in the created JOptionPane
.
Object
to display
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
DEFAULT_OPTION
,
YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
OK_CANCEL_OPTION
Icon
image to displaypublic JOptionPane |
JOptionPane
to display a message
with the specified message type, icon, and options, with the
initially-selected option specified.
Object
to display
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
DEFAULT_OPTION
,
YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
OK_CANCEL_OPTION
null
, then nothing will be initially selected;
only meaningful if options
is usedpublic static String showInputDialog |
(Object message) |
throws |
Object
to displaypublic static String showInputDialog |
initialSelectionValue
. The
dialog uses the default frame, which usually means it is centered on
the screen.
Object
to display
public static String showInputDialog |
|
throws |
parentComponent
.
The dialog is displayed on top of the Component
's
frame, and is usually positioned below the Component
.
Component
for the
dialog
Object
to displaypublic static String showInputDialog |
parentComponent
. The input value will be
initialized to initialSelectionValue
.
The dialog is displayed on top of the Component
's
frame, and is usually positioned below the Component
.
Component
for the
dialog
Object
to displaypublic static String showInputDialog |
|
throws |
parentComponent
with the dialog having the title
title
and message type messageType
.
Component
for the
dialog
Object
to displayString
to display in the dialog
title barERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static Object showInputDialog |
|
throws |
selectionValues
, where null
implies the
user can input
whatever they wish, usually by means of a JTextField
.
initialSelectionValue
is the initial value to prompt
the user with. It is up to the UI to decide how best to represent
the selectionValues
, but usually a
JComboBox
, JList
, or
JTextField
will be used.
Component
for the
dialog
Object
to displayString
to display in the
dialog title barERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
Icon
image to displayObject
s that
gives the possible selectionsnull
meaning the user
canceled the inputpublic static void showMessageDialog |
|
throws |
Frame
in
which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Object
to displaypublic static void showMessageDialog |
|
throws |
messageType
parameter.
Frame
in which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Object
to displayERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static void showMessageDialog |
|
throws |
Frame
in which the
dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a
default Frame
is used
Object
to displayERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static int showConfirmDialog |
|
throws |
Frame
in which the
dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a
default Frame
is used
Object
to displaypublic static int showConfirmDialog |
|
throws |
optionType
parameter.
Frame
in which the
dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a
default Frame
is used
Object
to displayYES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
or OK_CANCEL_OPTION
public static int showConfirmDialog |
|
throws |
optionType
parameter, where the
messageType
parameter determines the icon to display.
The messageType
parameter is primarily used to supply
a default icon from the Look and Feel.
Frame
in
which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a
default Frame
is used.
Object
to displayYES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
or OK_CANCEL_OPTION
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static int showConfirmDialog |
|
throws |
optionType
parameter.
The messageType
parameter is primarily used to supply
a default icon from the look and feel.
Frame
in which the
dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a
default Frame
is used
YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
or OK_CANCEL_OPTION
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static int showOptionDialog |
|
throws |
initialValue
parameter and
the number of choices is determined by the optionType
parameter.
If optionType
is YES_NO_OPTION
,
or YES_NO_CANCEL_OPTION
and the options
parameter is null
,
then the options are
supplied by the look and feel.
The messageType
parameter is primarily used to supply
a default icon from the look and feel.
Frame
in which the dialog is displayed; if
null
, or if the
parentComponent
has no
Frame
, a
default Frame
is used
Object
to displayDEFAULT_OPTION
,
YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
or OK_CANCEL_OPTION
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
String
objects are
rendered using their toString
methods;
if this parameter is null
,
the options are determined by the Look and Feeloptions
is used; can be null
CLOSED_OPTION
if the user closed
the dialogpublic JDialog createDialog |
|
throws |
JDialog
wrapping
this
centered on the parentComponent
in the parentComponent
's frame.
title
is the title of the returned dialog.
The returned JDialog
will not be resizable by the
user, however programs can invoke setResizable
on
the JDialog
instance to change this property.
The returned JDialog
will be set up such that
once it is closed, or the user clicks on one of the buttons,
the optionpane's value property will be set accordingly and
the dialog will be closed. Each time the dialog is made visible,
it will reset the option pane's value property to
JOptionPane.UNINITIALIZED_VALUE
to ensure the
user's subsequent action closes the dialog properly.
parentComponent
has
no Frame
, a default Frame
is used
JDialog
containing this instancepublic JDialog createDialog |
(String title) |
throws |
JDialog
with the specified title.
The returned JDialog
will not be resizable by the
user, however programs can invoke setResizable
on
the JDialog
instance to change this property.
The returned JDialog
will be set up such that
once it is closed, or the user clicks on one of the buttons,
the optionpane's value property will be set accordingly and
the dialog will be closed. Each time the dialog is made visible,
it will reset the option pane's value property to
JOptionPane.UNINITIALIZED_VALUE
to ensure the
user's subsequent action closes the dialog properly.
JDialog
containing this instancepublic static void showInternalMessageDialog |
Frame
in which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
public static void showInternalMessageDialog |
messageType
parameter.
Frame
in which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Object
to displayERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static void showInternalMessageDialog |
Frame
in which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Object
to displayERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static int showInternalConfirmDialog |
Frame
in
which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Object
to displaypublic static int showInternalConfirmDialog |
optionType
parameter.
Frame
in which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Component
object is rendered as a
Component
; a String
object is rendered as a string; other objects
are converted to a String
using the
toString
methodYES_NO_OPTION
,
or YES_NO_CANCEL_OPTION
public static int showInternalConfirmDialog |
optionType
parameter, where
the messageType
parameter determines the icon to display.
The messageType
parameter is primarily used to supply
a default icon from the Look and Feel.
Frame
in
which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Component
object is rendered as a
Component
; a String
object is rendered as a string; other objects are
converted to a String
using the
toString
methodYES_NO_OPTION
, or YES_NO_CANCEL_OPTION
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
, QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static int showInternalConfirmDialog |
optionType
parameter.
The messageType
parameter is primarily used to supply
a default icon from the look and feel.
Frame
in which the dialog is displayed; if null
,
or if the parentComponent has no Frame, a
default Frame
is used
Component
object is rendered as a
Component
; a String
object is rendered as a string; other objects are
converted to a String
using the
toString
methodYES_NO_OPTION
, or
YES_NO_CANCEL_OPTION
.ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
, QUESTION_MESSAGE
,
or PLAIN_MESSAGE
public static int showInternalOptionDialog |
initialValue
parameter and the number of choices is determined by the
optionType
parameter.
If optionType
is YES_NO_OPTION
, or
YES_NO_CANCEL_OPTION
and the options
parameter is null
,
then the options are supplied by the Look and Feel.
The messageType
parameter is primarily used to supply
a default icon from the look and feel.
Frame
in which the dialog is displayed; if null
,
or if the parentComponent
has no
Frame
, a default Frame
is used
Component
object is rendered as a
Component
; a String
object is rendered as a string. Other objects are
converted to a String
using the
toString
methodYES_NO_OPTION
,
or YES_NO_CANCEL_OPTION
ERROR_MESSAGE
,
INFORMATION_MESSAGE
,
WARNING_MESSAGE
, QUESTION_MESSAGE
,
or PLAIN_MESSAGE
String
objects are rendered using their toString
methods; if this parameter is null
,
the options are determined by the Look and Feeloptions
is used; can be null
CLOSED_OPTION
if the user closed the Dialogpublic static String showInternalInputDialog |
parentComponent
. The dialog
is displayed in the Component
's frame,
and is usually positioned below the Component
.
Component
for the dialog
Object
to displaypublic static String showInternalInputDialog |
parentComponent
with the dialog having the title
title
and message type messageType
.
Component
for the dialog
Object
to displayString
to display in the
dialog title barpublic static Object showInternalInputDialog |
selectionValues
, where null
implies the user can input
whatever they wish, usually by means of a JTextField
.
initialSelectionValue
is the initial value to prompt
the user with. It is up to the UI to decide how best to represent
the selectionValues
, but usually a
JComboBox
, JList
, or
JTextField
will be used.
Component
for the dialog
Object
to displayString
to display in the dialog
title barERROR_MESSAGE
, INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
, or PLAIN_MESSAGE
Icon
image to displayObjects
that
gives the possible selectionsnull
meaning the user
canceled the inputpublic JInternalFrame createInternalFrame |
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.
Component
for
the internal frame
String
to display in the
frame's title barJInternalFrame
containing a
JOptionPane
parentComponent
does
not have a valid parentpublic static Frame getFrameForComponent |
(Component parentComponent) |
throws |
Frame
.
Component
to check for a
Frame
Frame
that contains the component,
or getRootFrame
if the component is null
,
or does not have a valid Frame
parentpublic static JDesktopPane getDesktopPaneForComponent |
(Component parentComponent) |
Component
to check for a
desktopJDesktopPane
that contains the component,
or null
if the component is null
or does not have an ancestor that is a
JInternalFrame
public static void setRootFrame |
(Frame newRootFrame) |
Note: It is recommended that rather than using this method you supply a valid parent.
Frame
to usepublic static Frame getRootFrame |
() |
throws |
Frame
to use for the class methods in
which a frame is not provided.
Frame
to usepublic void setUI |
(OptionPaneUI ui) |
OptionPaneUI
L&F objectpublic OptionPaneUI getUI |
() |
OptionPaneUI
objectpublic void updateUI |
() |
UIManager
that the L&F has changed.
Replaces the current UI object with the latest version from the
UIManager
.
public String getUIClassID |
() |
public void setMessage |
(Object newMessage) |
Object
to displaypublic Object getMessage |
() |
Object
that is displayedpublic void setIcon |
(Icon newIcon) |
null
, the look and feel
does not provide an icon.
Icon
to displaypublic Icon getIcon |
() |
public void setValue |
(Object newValue) |
public Object getValue |
() |
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.
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 choicepublic void setOptions |
(Object[] newOptions) |
newOptions
is a Component
it is added directly to the pane,
otherwise a button is created for the element.
Objects
that create the
buttons the user can click on, or arbitrary
Components
to add to the panepublic Object[] getOptions |
() |
Objects
that give the user's choicespublic void setInitialValue |
(Object newInitialValue) |
Component
that has the focus when the pane is initially displayed.
Object
that gets the initial
keyboard focuspublic Object getInitialValue |
() |
Object
that gets the initial keyboard focuspublic void setMessageType |
(int newType) |
parentComponent
.
ERROR_MESSAGE
, INFORMATION_MESSAGE
,
WARNING_MESSAGE
,
QUESTION_MESSAGE
, or PLAIN_MESSAGE
newType
is not one of the
legal values listed abovepublic int getMessageType |
() |
public void setOptionType |
(int newType) |
DEFAULT_OPTION
,
YES_NO_OPTION
,
YES_NO_CANCEL_OPTION
,
or OK_CANCEL_OPTION
newType
is not one of
the legal values listed abovepublic int getOptionType |
() |
public void setSelectionValues |
(Object[] newValues) |
null
value
implies the user can input whatever they wish, usually by means
of a JTextField
.
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.
Objects
the user to be
displayed
(usually in a list or combo-box) from which
the user can make a selectionpublic Object[] getSelectionValues |
() |
Objects
the user can selectpublic void setInitialSelectionValue |
(Object newValue) |
wantsInput
is true.
public Object getInitialSelectionValue |
() |
public void setInputValue |
(Object newValue) |
wantsInput
is true. Note that this method
is invoked internally by the option pane (in response to user action)
and should generally not be called by client programs. To set the
input value initially displayed as selected to the user, use
setInitialSelectionValue
.
Object
used to set the
value that the user specified (usually in a text field)public Object getInputValue |
() |
wantsInput
is true.
Object
the user specified,
if it was one of the objects, or a
String
if it was a value typed into a
fieldpublic int getMaxCharactersPerLineCount |
() |
Integer.MAX_VALUE
.
The value can be
changed by overriding this method in a subclass.
public void setWantsInput |
(boolean newValue) |
wantsInput
property.
If newValue
is true, an input component
(such as a text field or combo box) whose parent is
parentComponent
is provided to
allow the user to input a value. If getSelectionValues
returns a non-null
array, 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.
public boolean getWantsInput |
() |
wantsInput
property.
public void selectInitialValue |
() |
protected String paramString |
() |
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
.
JOptionPane
public AccessibleContext getAccessibleContext |
() |
AccessibleContext
associated with this JOptionPane.
For option panes, the AccessibleContext
takes the form of an
AccessibleJOptionPane
.
A new AccessibleJOptionPane
instance is created if necessary.
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