javax.swing
Class JSpinner

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.JSpinner

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable

public class JSpinner

extends JComponent

A single line input field that lets the user select a number or an object value from an ordered sequence. Spinners typically provide a pair of tiny arrow buttons for stepping through the elements of the sequence. The keyboard up/down arrow keys also cycle through the elements. The user may also be allowed to type a (legal) value directly into the spinner. Although combo boxes provide similar functionality, spinners are sometimes preferred because they don't require a drop down list that can obscure important data.

A JSpinner's sequence value is defined by its SpinnerModel. The model can be specified as a constructor argument and changed with the model property. SpinnerModel classes for some common types are provided: SpinnerListModel, SpinnerNumberModel, and SpinnerDateModel.

A JSpinner has a single child component that's responsible for displaying and potentially changing the current element or value of the model, which is called the editor. The editor is created by the JSpinner's constructor and can be changed with the editor property. The JSpinner's editor stays in sync with the model by listening for ChangeEvents.

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^TM has been added to the java.beans package. Please see XMLEncoder.

Since:

1.4

Author:

Hans Muller

See Also:

SpinnerModel, AbstractSpinnerModel, SpinnerListModel, SpinnerNumberModel, SpinnerDateModel, JFormattedTextField, Serialized Form

Nested Class Summary

static class	JSpinner.DateEditor An editor for a JSpinner whose model is a SpinnerDateModel.
private static class	JSpinner.DateEditorFormatter This subclass of javax.swing.DateFormatter maps the minimum/maximum properties to te start/end properties of a SpinnerDateModel.
static class	JSpinner.DefaultEditor A simple base class for more specialized editors that displays a read-only view of the model's current value with a JFormattedTextField.
private static class	JSpinner.DisabledAction An Action implementation that is always disabled.
static class	JSpinner.ListEditor An editor for a JSpinner whose model is a SpinnerListModel.
private class	JSpinner.ModelListener We pass Change events along to the listeners with the the slider (instead of the model itself) as the event source.
static class	JSpinner.NumberEditor An editor for a JSpinner whose model is a SpinnerNumberModel.
private static class	JSpinner.NumberEditorFormatter This subclass of javax.swing.NumberFormatter maps the minimum/maximum properties to a SpinnerNumberModel and initializes the valueClass of the NumberFormatter to match the type of the initial models value.

Nested classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent, JComponent.ActionStandin, JComponent.IntVector, JComponent.KeyboardState

Nested classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

private ChangeEvent	changeEvent
private static Action	DISABLED_ACTION
private JComponent	editor
private boolean	editorExplicitlySet
private SpinnerModel	model
private ChangeListener	modelListener
private static String	uiClassID

Fields inherited from class javax.swing.JComponent

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

Fields inherited from class java.awt.Container

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

JSpinner()
Constructs a spinner with an Integer SpinnerNumberModel with initial value 0 and no minimum or maximum limits.

JSpinner(SpinnerModel model)
Constructs a complete spinner with pair of next/previous buttons and an editor for the SpinnerModel.

Method Summary

void	addChangeListener(ChangeListener listener) Adds a listener to the list that is notified each time a change to the model occurs.
void	commitEdit() Commits the currently edited value to the SpinnerModel.
protected JComponent	createEditor(SpinnerModel model) This method is called by the constructors to create the JComponent that displays the current value of the sequence.
protected void	fireStateChanged() Sends a ChangeEvent, whose source is this JSpinner, to each ChangeListener.
ChangeListener[]	getChangeListeners() Returns an array of all the ChangeListeners added to this JSpinner with addChangeListener().
JComponent	getEditor() Returns the component that displays and potentially changes the model's value.
SpinnerModel	getModel() Returns the SpinnerModel that defines this spinners sequence of values.
Object	getNextValue() Returns the object in the sequence that comes after the object returned by getValue().
Object	getPreviousValue() Returns the object in the sequence that comes before the object returned by getValue().
SpinnerUI	getUI() Returns the look and feel (L&F) object that renders this component.
String	getUIClassID() Returns the suffix used to construct the name of the look and feel (L&F) class used to render this component.
Object	getValue() Returns the current value of the model, typically this value is displayed by the editor.
private void	readObject(ObjectInputStream s) We use the ObjectInputStream "registerValidation" callback to update the UI for the entire tree of components after they've all been read in.
void	removeChangeListener(ChangeListener listener) Removes a ChangeListener from this spinner.
void	setEditor(JComponent editor) Changes the JComponent that displays the current value of the SpinnerModel.
void	setModel(SpinnerModel model) Changes the model that represents the value of this spinner.
void	setUI(SpinnerUI ui) Sets the look and feel (L&F) object that renders this component.
void	setValue(Object value) Changes current value of the model, typically this value is displayed by the editor.
void	updateUI() Resets the UI property with the value from the current look and feel.
private void	writeObject(ObjectOutputStream s) Before writing a JComponent to an ObjectOutputStream we temporarily uninstall its UI.

Methods inherited from class javax.swing.JComponent

_paintImmediately, addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, alwaysOnTop, checkIfChildObscuredBySibling, componentInputMapChanged, computeVisibleRect, computeVisibleRect, compWriteObjectNotify, contains, createToolTip, disable, enable, enableSerialization, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getAccessibleContext, getActionForKeyStroke, getActionMap, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getCreatedDoubleBuffer, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getManagingFocusBackwardTraversalKeys, getManagingFocusForwardTraversalKeys, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getWriteObjCounter, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingOrigin, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, paramString, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyBindings, processKeyBindingsForAllComponents, processKeyEvent, processMouseMotionEvent, putClientProperty, rectangleIsObscured, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setCreatedDoubleBuffer, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPaintingChild, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, setWriteObjCounter, shouldDebugGraphics, superProcessMouseMotionEvent, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

uiClassID

private static final String uiClassID

See Also:

getUIClassID(), readObject(java.io.ObjectInputStream), Constant Field Values

DISABLED_ACTION

private static final Action DISABLED_ACTION

model

private transient SpinnerModel model

editor

private JComponent editor

modelListener

private ChangeListener modelListener

changeEvent

private transient ChangeEvent changeEvent

editorExplicitlySet

private boolean editorExplicitlySet

Constructor Detail

JSpinner

public JSpinner(SpinnerModel model)

Constructs a complete spinner with pair of next/previous buttons and an editor for the SpinnerModel.

JSpinner

public JSpinner()

Constructs a spinner with an Integer SpinnerNumberModel with initial value 0 and no minimum or maximum limits.

Method Detail

getUI

public SpinnerUI getUI()

Returns the look and feel (L&F) object that renders this component.

Returns:

the SpinnerUI object that renders this component

setUI

public void setUI(SpinnerUI ui)

Sets the look and feel (L&F) object that renders this component.

Parameters:

ui - the SpinnerUI L&F object

See Also:

UIDefaults.getUI(javax.swing.JComponent)

getUIClassID

public String getUIClassID()

Returns the suffix used to construct the name of the look and feel (L&F) class used to render this component.

Overrides:

getUIClassID in class JComponent

Returns:

the string "SpinnerUI"

See Also:

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

updateUI

public void updateUI()

Resets the UI property with the value from the current look and feel.

Overrides:

updateUI in class JComponent

See Also:

UIManager.getUI(javax.swing.JComponent)

createEditor

protected JComponent createEditor(SpinnerModel model)

This method is called by the constructors to create the JComponent that displays the current value of the sequence. The editor may also allow the user to enter an element of the sequence directly. An editor must listen for ChangeEvents on the model and keep the value it displays in sync with the value of the model.

Subclasses may override this method to add support for new SpinnerModel classes. Alternatively one can just replace the editor created here with the setEditor method. The default mapping from model type to editor is:

• SpinnerNumberModel => JSpinner.NumberEditor
• SpinnerDateModel => JSpinner.DateEditor
• SpinnerListModel => JSpinner.ListEditor
• all others => JSpinner.DefaultEditor

Parameters:

model - the value of getModel

Returns:

a component that displays the current value of the sequence

See Also:

getModel(), setEditor(javax.swing.JComponent)

setModel

public void setModel(SpinnerModel model)

Changes the model that represents the value of this spinner. If the editor property has not been explicitly set, the editor property is (implicitly) set after the "model" PropertyChangeEvent has been fired. The editor property is set to the value returned by createEditor, as in:

 setEditor(createEditor(model));
 

Parameters:

model - the new SpinnerModel

Throws:

IllegalArgumentException - if model is null

See Also:

getModel(), getEditor(), setEditor(javax.swing.JComponent)

getModel

public SpinnerModel getModel()

Returns the SpinnerModel that defines this spinners sequence of values.

Returns:

the value of the model property

See Also:

setModel(javax.swing.SpinnerModel)

getValue

public Object getValue()

Returns the current value of the model, typically this value is displayed by the editor.

This method simply delegates to the model. It is equivalent to:

 getModel().getValue()
 

See Also:

setValue(java.lang.Object), SpinnerModel.getValue()

setValue

public void setValue(Object value)

Changes current value of the model, typically this value is displayed by the editor. If the SpinnerModel implementation doesn't support the specified value then an IllegalArgumentException is thrown.

This method simply delegates to the model. It is equivalent to:

 getModel().setValue(value)
 

Throws:

IllegalArgumentException - if value isn't allowed

See Also:

getValue(), SpinnerModel.setValue(java.lang.Object)

getNextValue

public Object getNextValue()

Returns the object in the sequence that comes after the object returned by getValue(). If the end of the sequence has been reached then return null. Calling this method does not effect value.

This method simply delegates to the model. It is equivalent to:

 getModel().getNextValue()
 

Returns:

the next legal value or null if one doesn't exist

See Also:

getValue(), getPreviousValue(), SpinnerModel.getNextValue()

addChangeListener

public void addChangeListener(ChangeListener listener)

Adds a listener to the list that is notified each time a change to the model occurs. The source of ChangeEvents delivered to ChangeListeners will be this JSpinner. Note also that replacing the model will not affect listeners added directly to JSpinner. Applications can add listeners to the model directly. In that case is that the source of the event would be the SpinnerModel.

Parameters:

listener - the ChangeListener to add

See Also:

removeChangeListener(javax.swing.event.ChangeListener), getModel()

removeChangeListener

public void removeChangeListener(ChangeListener listener)

Removes a ChangeListener from this spinner.

Parameters:

listener - the ChangeListener to remove

See Also:

fireStateChanged(), addChangeListener(javax.swing.event.ChangeListener)

getChangeListeners

public ChangeListener[] getChangeListeners()

Returns an array of all the ChangeListeners added to this JSpinner with addChangeListener().

Returns:

all of the ChangeListeners added or an empty array if no listeners have been added

Since:

1.4

fireStateChanged

protected void fireStateChanged()

Sends a ChangeEvent, whose source is this JSpinner, to each ChangeListener. When a ChangeListener has been added to the spinner, this method method is called each time a ChangeEvent is received from the model.

See Also:

addChangeListener(javax.swing.event.ChangeListener), removeChangeListener(javax.swing.event.ChangeListener), EventListenerList

getPreviousValue

public Object getPreviousValue()

Returns the object in the sequence that comes before the object returned by getValue(). If the end of the sequence has been reached then return null. Calling this method does not effect value.

This method simply delegates to the model. It is equivalent to:

 getModel().getPreviousValue()
 

Returns:

the previous legal value or null if one doesn't exist

See Also:

getValue(), getNextValue(), SpinnerModel.getPreviousValue()

setEditor

public void setEditor(JComponent editor)

Changes the JComponent that displays the current value of the SpinnerModel. It is the responsibility of this method to disconnect the old editor from the model and to connect the new editor. This may mean removing the old editors ChangeListener from the model or the spinner itself and adding one for the new editor.

Parameters:

editor - the new editor

Throws:

IllegalArgumentException - if editor is null

See Also:

getEditor(), createEditor(javax.swing.SpinnerModel), getModel()

getEditor

public JComponent getEditor()

Returns the component that displays and potentially changes the model's value.

Returns:

the component that displays and potentially changes the model's value

See Also:

setEditor(javax.swing.JComponent), createEditor(javax.swing.SpinnerModel)

commitEdit

public void commitEdit()
                throws ParseException

Commits the currently edited value to the SpinnerModel.

If the editor is an instance of DefaultEditor, the call if forwarded to the editor, otherwise this does nothing.

Throws:

ParseException - if the currently edited value couldn't be commited.

writeObject

private void writeObject(ObjectOutputStream s)
                  throws IOException

Description copied from class: JComponent

Before writing a JComponent to an ObjectOutputStream we temporarily uninstall its UI. This is tricky to do because we want to uninstall the UI before any of the JComponent's children (or its LayoutManager etc.) are written, and we don't want to restore the UI until the most derived JComponent subclass has been been stored.

Throws:

IOException

readObject

private void readObject(ObjectInputStream s)
                 throws IOException,
                        ClassNotFoundException

Description copied from class: JComponent

We use the ObjectInputStream "registerValidation" callback to update the UI for the entire tree of components after they've all been read in.

Throws:

IOException

ClassNotFoundException