public abstract class AbstractAction extends Object implements Action, Cloneable, Serializable
This class provides default implementations for the JFC Action interface. Standard behaviors like the get and set methods for Action object properties (icon, text, and enabled) are defined here. The developer need only subclass this abstract class and define the actionPerformed method.
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.
Actionprotected boolean enabled
Specifies whether action is enabled; the default is true.
protected SwingPropertyChangeSupport changeSupport
If any PropertyChangeListeners have been registered, the changeSupport field describes them.
public AbstractAction()
Creates an Action.
public AbstractAction(String name)
Creates an Action with the specified name.
name - the name (Action.NAME) for the action; a value of null is ignoredpublic AbstractAction(String name,
Icon icon) Creates an Action with the specified name and small icon.
name - the name (Action.NAME) for the action; a value of null is ignoredicon - the small icon (Action.SMALL_ICON) for the action; a value of null is ignoredpublic Object getValue(String key)
Gets the Object associated with the specified key.
getValue in interface Action
key - a string containing the specified key
Object stored with this key; if there are no keys, it will return null
Action.getValue(java.lang.String)public void putValue(String key,
Object newValue) Sets the Value associated with the specified key.
putValue in interface Action
key - the String that identifies the stored objectnewValue - the Object to store using this keyAction.putValue(java.lang.String, java.lang.Object)public boolean isEnabled()
Returns true if the action is enabled.
isEnabled in interface Action
Action.isEnabled()public void setEnabled(boolean newValue)
Sets whether the Action is enabled. The default is true.
setEnabled in interface Action
newValue - true to enable the action, false to disable itAction.setEnabled(boolean)public Object[] getKeys()
Returns an array of Objects which are keys for which values have been set for this AbstractAction, or null if no keys have values set.
null if no keys have values setprotected void firePropertyChange(String propertyName,
Object oldValue,
Object newValue) Supports reporting bound property changes. This method can be called when a bound property has changed and it will send the appropriate PropertyChangeEvent to any registered PropertyChangeListeners.
public void addPropertyChangeListener(PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list. The listener is registered for all properties.
A PropertyChangeEvent will get fired in response to setting a bound property, e.g. setFont, setBackground, or setForeground. Note that if the current component is inheriting its foreground, background, or font from its container, then no event will be fired in response to a change in the inherited property.
addPropertyChangeListener in interface Action
listener - The PropertyChangeListener to be addedAction.addPropertyChangeListener(java.beans.PropertyChangeListener)public void removePropertyChangeListener(PropertyChangeListener listener)
Removes a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.
removePropertyChangeListener in interface Action
listener - the PropertyChangeListener to be removedAction.removePropertyChangeListener(java.beans.PropertyChangeListener)public PropertyChangeListener[] getPropertyChangeListeners()
Returns an array of all the PropertyChangeListeners added to this AbstractAction with addPropertyChangeListener().
PropertyChangeListeners added or an empty array if no listeners have been addedprotected Object clone()
throws CloneNotSupportedException Clones the abstract action. This gives the clone its own copy of the key/value list, which is not handled for you by Object.clone().
clone in class Object
CloneNotSupportedException - if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.Cloneable
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