Module java.desktop
Package javax.swing

Class ActionMap

  • All Implemented Interfaces:
    Direct Known Subclasses:

    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():
    some of the methods will cause a StackOverflowError to be thrown.

    See Also:
    InputMap, Serialized Form
    • Constructor Detail

      • ActionMap

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

      • setParent

        public void setParent​(ActionMap map)
        Sets this ActionMap's parent.
        map - the ActionMap that is the parent of this one
      • getParent

        public ActionMap getParent()
        Returns this ActionMap's parent.
        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).

        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.
        key - a key
        the binding for key
      • remove

        public void remove​(Object key)
        Removes the binding for key from this ActionMap.
        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.
        an array of the keys
      • size

        public int size()
        Returns the number of bindings in this ActionMap.
        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.
        an array of the keys