Serializable
ActionMapUIResource
public class ActionMap extends Object implements Serializable
ActionMap
provides mappings from Object
s (called keys or Action
names) to Action
s. 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.
Constructor | Description |
---|---|
ActionMap() |
Creates an ActionMap with no parent and no mappings. |
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 |
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 |
Adds a binding for key to action . |
void |
remove |
Removes the binding for key from this ActionMap . |
void |
setParent |
Sets this ActionMap 's parent. |
int |
size() |
Returns the number of bindings in this ActionMap . |
public ActionMap()
ActionMap
with no parent and no mappings.public void setParent(ActionMap map)
ActionMap
's parent.map
- the ActionMap
that is the parent of this onepublic ActionMap getParent()
ActionMap
's parent.ActionMap
that is the parent of this one, or null if this ActionMap
has no parentpublic void put(Object key, Action action)
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 keyaction
- a binding for key
public Action get(Object key)
key
, messaging the parent ActionMap
if the binding is not locally defined.key
- a keykey
public void remove(Object key)
key
from this ActionMap
.key
- a keypublic void clear()
ActionMap
.public Object[] keys()
Action
names that are bound in this ActionMap
.public int size()
ActionMap
.ActionMap
public Object[] allKeys()
ActionMap
and its parent. This method differs from keys()
in that this method includes the keys defined in the parent.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/ActionMap.html