javax.swing
Class UIDefaults

java.lang.Object
  java.util.Dictionary
      java.util.Hashtable
          javax.swing.UIDefaults

All Implemented Interfaces:

Cloneable, Map, Serializable

Direct Known Subclasses:

MultiUIDefaults, MultiUIDefaults

public class UIDefaults

extends Hashtable

A table of defaults for Swing components. Applications can set/get default values via the UIManager.

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.

Author:

Hans Muller

See Also:

UIManager, Serialized Form

Nested Class Summary

static interface	UIDefaults.ActiveValue This class enables one to store an entry in the defaults table that's constructed each time it's looked up with one of the getXXX(key) methods.
static class	UIDefaults.LazyInputMap LazyInputMap will create a InputMap in its createValue method.
static interface	UIDefaults.LazyValue This class enables one to store an entry in the defaults table that isn't constructed until the first time it's looked up with one of the getXXX(key) methods.
static class	UIDefaults.ProxyLazyValue This class provides an implementation of LazyValue which can be used to delay loading of the Class for the instance to be created.

Nested classes inherited from class java.util.Hashtable

Field Summary

private SwingPropertyChangeSupport	changeSupport
private Locale	defaultLocale
private static Object	PENDING
private Vector	resourceBundles
private Map	resourceCache Maps from a Locale to a cached Map of the ResourceBundle.

Fields inherited from class java.util.Hashtable

Constructor Summary

UIDefaults()
Create an empty defaults table.

UIDefaults(Object[] keyValueList)
Create a defaults table initialized with the specified key/value pairs.

Method Summary

void	addPropertyChangeListener(java.beans.PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list.
void	addResourceBundle(String bundleName) Adds a resource bundle to the list of resource bundles that are searched for localized values.
protected void	firePropertyChange(String propertyName, Object oldValue, Object newValue) Support for reporting bound property changes.
Object	get(Object key) Returns the value for key.
Object	get(Object key, Locale l) Returns the value for key associated with the given locale.
boolean	getBoolean(Object key) If the value of key is boolean, return the boolean value, otherwise return false.
boolean	getBoolean(Object key, Locale l) If the value of key for the given Locale is boolean, return the boolean value, otherwise return false.
Border	getBorder(Object key) If the value of key is a Border return it, otherwise return null.
Border	getBorder(Object key, Locale l) If the value of key for the given Locale is a Border return it, otherwise return null.
Color	getColor(Object key) If the value of key is a Color return it, otherwise return null.
Color	getColor(Object key, Locale l) If the value of key for the given Locale is a Color return it, otherwise return null.
Locale	getDefaultLocale() Returns the default locale.
Dimension	getDimension(Object key) If the value of key is a Dimension return it, otherwise return null.
Dimension	getDimension(Object key, Locale l) If the value of key for the given Locale is a Dimension return it, otherwise return null.
Font	getFont(Object key) If the value of key is a Font return it, otherwise return null.
Font	getFont(Object key, Locale l) If the value of key for the given Locale is a Font return it, otherwise return null.
private Object	getFromHashtable(Object key) Looks up up the given key in our Hashtable and resolves LazyValues or ActiveValues.
private Object	getFromResourceBundle(Object key, Locale l) Looks up given key in our resource bundles.
Icon	getIcon(Object key) If the value of key is an Icon return it, otherwise return null.
Icon	getIcon(Object key, Locale l) If the value of key for the given Locale is an Icon return it, otherwise return null.
Insets	getInsets(Object key) If the value of key is an Insets return it, otherwise return null.
Insets	getInsets(Object key, Locale l) If the value of key for the given Locale is an Insets return it, otherwise return null.
int	getInt(Object key) If the value of key is an Integer return its integer value, otherwise return 0.
int	getInt(Object key, Locale l) If the value of key for the given Locale is an Integer return its integer value, otherwise return 0.
java.beans.PropertyChangeListener[]	getPropertyChangeListeners() Returns an array of all the PropertyChangeListeners added to this UIDefaults with addPropertyChangeListener().
private Map	getResourceCache(Locale l) Returns a Map of the known resources for the given locale.
String	getString(Object key) If the value of key is a String return it, otherwise return null.
String	getString(Object key, Locale l) If the value of key for the given Locale is a String return it, otherwise return null.
ComponentUI	getUI(JComponent target) Creates an ComponentUI implementation for the specified component.
Class	getUIClass(String uiClassID) Returns the L&F class that renders this component.
Class	getUIClass(String uiClassID, ClassLoader uiClassLoader) The value of get(uidClassID) must be the String name of a class that implements the corresponding ComponentUI class.
protected void	getUIError(String msg) If getUI() fails for any reason, it calls this method before returning null.
Object	put(Object key, Object value) Sets the value of key to value for all locales.
void	putDefaults(Object[] keyValueList) Puts all of the key/value pairs in the database and unconditionally generates one PropertyChangeEvent.
void	removePropertyChangeListener(java.beans.PropertyChangeListener listener) Removes a PropertyChangeListener from the listener list.
void	removeResourceBundle(String bundleName) Removes a resource bundle from the list of resource bundles that are searched for localized defaults.
void	setDefaultLocale(Locale l) Sets the default locale.

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, hashCode, isEmpty, keys, keySet, putAll, rehash, remove, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

PENDING

private static final Object PENDING

changeSupport

private SwingPropertyChangeSupport changeSupport

resourceBundles

private Vector resourceBundles

defaultLocale

private Locale defaultLocale

resourceCache

private Map resourceCache

Maps from a Locale to a cached Map of the ResourceBundle. This is done so as to avoid an exception being thrown when a value is asked for. Access to this should be done while holding a lock on the UIDefaults, eg synchronized(this).

Constructor Detail

UIDefaults

public UIDefaults()

Create an empty defaults table.

UIDefaults

public UIDefaults(Object[] keyValueList)

Create a defaults table initialized with the specified key/value pairs. For example:

        Object[] uiDefaults = {
             "Font", new Font("Dialog", Font.BOLD, 12),
            "Color", Color.red,
             "five", new Integer(5)
        }
        UIDefaults myDefaults = new UIDefaults(uiDefaults);
 

Parameters:

keyValueList - an array of objects containing the key/value pairs

Method Detail

get

public Object get(Object key)

Returns the value for key. If the value is a UIDefaults.LazyValue then the real value is computed with LazyValue.createValue(), the table entry is replaced, and the real value is returned. If the value is an UIDefaults.ActiveValue the table entry is not replaced - the value is computed with ActiveValue.createValue() for each get() call. If the key is not found in the table then it is searched for in the list of resource bundles maintained by this object. The resource bundles are searched most recently added first using the locale returned by getDefaultLocale. LazyValues and ActiveValues are not supported in the resource bundles.

Specified by:

get in interface Map

Overrides:

get in class Hashtable

Parameters:

key - the desired key

Returns:

the value for key

Since:

1.4

See Also:

UIDefaults.LazyValue, UIDefaults.ActiveValue, Hashtable.get(java.lang.Object), getDefaultLocale(), addResourceBundle(java.lang.String)

getFromHashtable

private Object getFromHashtable(Object key)

Looks up up the given key in our Hashtable and resolves LazyValues or ActiveValues.

get

public Object get(Object key,
                  Locale l)

Returns the value for key associated with the given locale. If the value is a UIDefaults.LazyValue then the real value is computed with LazyValue.createValue(), the table entry is replaced, and the real value is returned. If the value is an UIDefaults.ActiveValue the table entry is not replaced - the value is computed with ActiveValue.createValue() for each get() call. If the key is not found in the table then it is searched for in the list of resource bundles maintained by this object. The resource bundles are searched most recently added first using the given locale. LazyValues and ActiveValues are not supported in the resource bundles.

Parameters:

key - the desired key

l - the desired locale

Returns:

the value for key

Since:

1.4

See Also:

UIDefaults.LazyValue, UIDefaults.ActiveValue, Hashtable.get(java.lang.Object), addResourceBundle(java.lang.String)

getFromResourceBundle

private Object getFromResourceBundle(Object key,
                                     Locale l)

Looks up given key in our resource bundles.

getResourceCache

private Map getResourceCache(Locale l)

Returns a Map of the known resources for the given locale.

put

public Object put(Object key,
                  Object value)

Sets the value of key to value for all locales. If key is a string and the new value isn't equal to the old one, fire a PropertyChangeEvent. If value is null, the key is removed from the table.

Specified by:

put in interface Map

Overrides:

put in class Hashtable

Parameters:

key - the unique Object who's value will be used to retrieve the data value associated with it

value - the new Object to store as data under that key

Returns:

the previous Object value, or null

See Also:

putDefaults(java.lang.Object[]), Hashtable.put(java.lang.Object, java.lang.Object)

putDefaults

public void putDefaults(Object[] keyValueList)

Puts all of the key/value pairs in the database and unconditionally generates one PropertyChangeEvent. The events oldValue and newValue will be null and its propertyName will be "UIDefaults". The key/value pairs are added for all locales.

Parameters:

keyValueList - an array of key/value pairs

See Also:

put(java.lang.Object, java.lang.Object), Hashtable.put(java.lang.Object, java.lang.Object)

getFont

public Font getFont(Object key)

If the value of key is a Font return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is a Font, return the Font object; otherwise return null

getFont

public Font getFont(Object key,
                    Locale l)

If the value of key for the given Locale is a Font return it, otherwise return null.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is a Font, return the Font object; otherwise return null

Since:

1.4

getColor

public Color getColor(Object key)

If the value of key is a Color return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is a Color, return the Color object; otherwise return null

getColor

public Color getColor(Object key,
                      Locale l)

If the value of key for the given Locale is a Color return it, otherwise return null.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is a Color, return the Color object; otherwise return null

Since:

1.4

getIcon

public Icon getIcon(Object key)

If the value of key is an Icon return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is an Icon, return the Icon object; otherwise return null

getIcon

public Icon getIcon(Object key,
                    Locale l)

If the value of key for the given Locale is an Icon return it, otherwise return null.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is an Icon, return the Icon object; otherwise return null

Since:

1.4

getBorder

public Border getBorder(Object key)

If the value of key is a Border return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is a Border, return the Border object; otherwise return null

getBorder

public Border getBorder(Object key,
                        Locale l)

If the value of key for the given Locale is a Border return it, otherwise return null.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is a Border, return the Border object; otherwise return null

Since:

1.4

getString

public String getString(Object key)

If the value of key is a String return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is a String, return the String object; otherwise return null

getString

public String getString(Object key,
                        Locale l)

If the value of key for the given Locale is a String return it, otherwise return null.

Parameters:

key - the desired key

l - the desired Locale

Returns:

if the value for key for the given Locale is a String, return the String object; otherwise return null

Since:

1.4

getInt

public int getInt(Object key)

If the value of key is an Integer return its integer value, otherwise return 0.

Parameters:

key - the desired key

Returns:

if the value for key is an Integer, return its value, otherwise return 0

getInt

public int getInt(Object key,
                  Locale l)

If the value of key for the given Locale is an Integer return its integer value, otherwise return 0.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is an Integer, return its value, otherwise return 0

Since:

1.4

getBoolean

public boolean getBoolean(Object key)

If the value of key is boolean, return the boolean value, otherwise return false.

Parameters:

key - an Object specifying the key for the desired boolean value

Returns:

if the value of key is boolean, return the boolean value, otherwise return false.

Since:

1.4

getBoolean

public boolean getBoolean(Object key,
                          Locale l)

If the value of key for the given Locale is boolean, return the boolean value, otherwise return false.

Parameters:

key - an Object specifying the key for the desired boolean value

l - the desired locale

Returns:

if the value for key and Locale is boolean, return the boolean value, otherwise return false.

Since:

1.4

getInsets

public Insets getInsets(Object key)

If the value of key is an Insets return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is an Insets, return the Insets object; otherwise return null

getInsets

public Insets getInsets(Object key,
                        Locale l)

If the value of key for the given Locale is an Insets return it, otherwise return null.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is an Insets, return the Insets object; otherwise return null

Since:

1.4

getDimension

public Dimension getDimension(Object key)

If the value of key is a Dimension return it, otherwise return null.

Parameters:

key - the desired key

Returns:

if the value for key is a Dimension, return the Dimension object; otherwise return null

getDimension

public Dimension getDimension(Object key,
                              Locale l)

If the value of key for the given Locale is a Dimension return it, otherwise return null.

Parameters:

key - the desired key

l - the desired locale

Returns:

if the value for key and Locale is a Dimension, return the Dimension object; otherwise return null

Since:

1.4

getUIClass

public Class getUIClass(String uiClassID,
                        ClassLoader uiClassLoader)

The value of get(uidClassID) must be the String name of a class that implements the corresponding ComponentUI class. If the class hasn't been loaded before, this method looks up the class with uiClassLoader.loadClass() if a non null class loader is provided, classForName() otherwise.

If a mapping for uiClassID exists or if the specified class can't be found, return null.

This method is used by getUI, it's usually not necessary to call it directly.

Parameters:

uiClassID - a string containing the class ID

uiClassLoader - the object which will load the class

Returns:

the value of Class.forName(get(uidClassID))

See Also:

getUI(javax.swing.JComponent)

getUIClass

public Class getUIClass(String uiClassID)

Returns the L&F class that renders this component.

Parameters:

uiClassID - a string containing the class ID

Returns:

the Class object returned by getUIClass(uiClassID, null)

getUIError

protected void getUIError(String msg)

If getUI() fails for any reason, it calls this method before returning null. Subclasses may choose to do more or less here.

Parameters:

msg - message string to print

See Also:

getUI(javax.swing.JComponent)

getUI

public ComponentUI getUI(JComponent target)

Creates an ComponentUI implementation for the specified component. In other words create the look and feel specific delegate object for target. This is done in two steps:

• Look up the name of the ComponentUI implementation class under the value returned by target.getUIClassID().
• Use the implementation classes static createUI() method to construct a look and feel delegate.

Parameters:

target - the JComponent which needs a UI

Returns:

the ComponentUI object

addPropertyChangeListener

public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

Adds a PropertyChangeListener to the listener list. The listener is registered for all properties.

A PropertyChangeEvent will get fired whenever a default is changed.

Parameters:

listener - the PropertyChangeListener to be added

See Also:

PropertyChangeSupport

removePropertyChangeListener

public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

Removes a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.

Parameters:

listener - the PropertyChangeListener to be removed

See Also:

PropertyChangeSupport

getPropertyChangeListeners

public java.beans.PropertyChangeListener[] getPropertyChangeListeners()

Returns an array of all the PropertyChangeListeners added to this UIDefaults with addPropertyChangeListener().

Returns:

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

Since:

1.4

firePropertyChange

protected void firePropertyChange(String propertyName,
                                  Object oldValue,
                                  Object newValue)

Support for reporting bound property changes. If oldValue and newValue are not equal and the PropertyChangeEventx listener list isn't empty, then fire a PropertyChange event to each listener.

Parameters:

propertyName - the programmatic name of the property that was changed

oldValue - the old value of the property

newValue - the new value of the property

See Also:

PropertyChangeSupport

addResourceBundle

public void addResourceBundle(String bundleName)

Adds a resource bundle to the list of resource bundles that are searched for localized values. Resource bundles are searched in the reverse order they were added. In other words, the most recently added bundle is searched first.

Parameters:

bundleName - the base name of the resource bundle to be added

Since:

1.4

See Also:

ResourceBundle, removeResourceBundle(java.lang.String)

removeResourceBundle

public void removeResourceBundle(String bundleName)

Removes a resource bundle from the list of resource bundles that are searched for localized defaults.

Parameters:

bundleName - the base name of the resource bundle to be removed

Since:

1.4

See Also:

ResourceBundle, addResourceBundle(java.lang.String)

setDefaultLocale

public void setDefaultLocale(Locale l)

Sets the default locale. The default locale is used in retrieving localized values via get methods that do not take a locale argument. As of release 1.4, Swing UI objects should retrieve localized values using the locale of their component rather than the default locale. The default locale exists to provide compatibility with pre 1.4 behaviour.

Parameters:

l - the new default locale

Since:

1.4

See Also:

getDefaultLocale(), get(Object), get(Object,Locale)

getDefaultLocale

public Locale getDefaultLocale()

Returns the default locale. The default locale is used in retrieving localized values via get methods that do not take a locale argument. As of release 1.4, Swing UI objects should retrieve localized values using the locale of their component rather than the default locale. The default locale exists to provide compatibility with pre 1.4 behaviour.

Returns:

the default locale

Since:

1.4

See Also:

setDefaultLocale(java.util.Locale), get(Object), get(Object,Locale)