Class ActionMap

java.lang.Object
javax.swing.ActionMap
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
ActionMapUIResource
public class ActionMap extends Object implements Serializable
ActionMap provides mappings from Objects (called keys or Action names) to Actions. An ActionMap is usually used with an InputMap to locate a particular action when a key is pressed. As with InputMap, an ActionMap can have a parent that is searched for keys not defined in the ActionMap.

As with InputMap if you create a cycle, eg: 

  ActionMap am = new ActionMap();
  ActionMap bm = new ActionMap():
  am.setParent(bm);
  bm.setParent(am);
some of the methods will cause a StackOverflowError to be thrown.
Since:
1.3
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    ActionMap()
    Creates an ActionMap with no parent and no mappings.

  • Method Summary

    Modifier and Type
    Method
    Description
    Object[]
    allKeys()
    Returns an array of the keys defined in this ActionMap and its parent.
    void
    clear()
    Removes all the mappings from this ActionMap.
    Action
    get(Object key)
    Returns the binding for key, messaging the parent ActionMap if the binding is not locally defined.
    ActionMap
    getParent()
    Returns this ActionMap's parent.
    Object[]
    keys()
    Returns the Action names that are bound in this ActionMap.
    void
    put(Object key, Action action)
    Adds a binding for key to action.
    void
    remove(Object key)
    Removes the binding for key from this ActionMap.
    void
    setParent(ActionMap map)
    Sets this ActionMap's parent.
    int
    size()
    Returns the number of bindings in this ActionMap.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • ActionMap

      public ActionMap()
      Creates an ActionMap with no parent and no mappings.

  • Method Details

    • setParent

      public void setParent(ActionMap map)
      Sets this ActionMap's parent.
      Parameters:
      map - the ActionMap that is the parent of this one

    • getParent

      public ActionMap getParent()
      Returns this ActionMap's parent.
      Returns:
      the ActionMap that is the parent of this one, or null if this ActionMap has no parent

    • put

      public void put(Object key, Action action)
      Adds a binding for key to action. If action is null, this removes the current binding for key.

      In most instances, key will be action.getValue(NAME).

      Parameters:
      key - a key
      action - a binding for key

    • get

      public Action get(Object key)
      Returns the binding for key, messaging the parent ActionMap if the binding is not locally defined.
      Parameters:
      key - a key
      Returns:
      the binding for key

    • remove

      public void remove(Object key)
      Removes the binding for key from this ActionMap.
      Parameters:
      key - a key

    • clear

      public void clear()
      Removes all the mappings from this ActionMap.

    • keys

      public Object[] keys()
      Returns the Action names that are bound in this ActionMap.
      Returns:
      an array of the keys

    • size

      public int size()
      Returns the number of bindings in this ActionMap.
      Returns:
      the number of bindings in this ActionMap

    • allKeys

      public Object[] allKeys()
      Returns an array of the keys defined in this ActionMap and its parent. This method differs from keys() in that this method includes the keys defined in the parent.
      Returns:
      an array of the keys