javafx.event

Class EventType<T extends Event>

java.lang.Object

javafx.event.EventType<T>

Type Parameters:

T - the event class to which this type applies

All Implemented Interfaces:

public final class EventType<T extends Event>
extends Object
implements Serializable

This class represents a specific event type associated with an Event.

Event types form a hierarchy with the ROOT (equals to Event.ANY) as its root. This is useful in event filter / handler registration where a single event filter / handler can be registered to a super event type and will be receiving its sub type events as well. Note that you cannot construct two different EventType objects with the same name and parent.

Note about deserialization: All EventTypes that are going to be deserialized (e.g. as part of Event deserialization), need to exist at the time of deserialization. Deserialization of EventType will not create new EventType objects.

Since:

JavaFX 2.0

Fields
Modifier and Type	Field and Description
`static EventType<Event>`	`ROOT` The root event type.

Constructor Summary

Constructors
Constructor and Description
`EventType()` Deprecated. Do not use this constructor, as only one such EventType can exist
`EventType(EventType<? super T> superType)` Constructs a new `EventType` with the specified super type and the name set to `null`.
`EventType(EventType<? super T> superType, String name)` Constructs a new `EventType` with the specified super type and name.
`EventType(String name)` Constructs a new `EventType` with the specified name and the `EventType.ROOT` as its super type.

Method Summary

All MethodsInstance MethodsConcrete Methods
Modifier and Type	Method and Description
`String`	`getName()` Gets the name of this event type.
`EventType<? super T>`	`getSuperType()` Gets the super type of this event type.
`String`	`toString()` Returns a string representation of this `EventType` object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail
- ROOT
```
public static final EventType<Event> ROOT
```
  The root event type. All other event types are either direct or indirect sub types of it. It is also the only event type which has its super event type set to null.

Constructor Detail
- EventType
```
@Deprecated
public EventType()
```
  Deprecated. Do not use this constructor, as only one such EventType can exist
  
  Constructs a new EventType with the EventType.ROOT as its super type and the name set to null.
- EventType
```
public EventType(String name)
```
  Constructs a new EventType with the specified name and the EventType.ROOT as its super type.
  
  Parameters:
  
  name - the name
  
  Throws:
  
  IllegalArgumentException - if an EventType with the same name and ROOT/Event.ANY as parent
- EventType
```
public EventType(EventType<? super T> superType)
```
  Constructs a new EventType with the specified super type and the name set to null.
  
  Parameters:
  
  superType - the event super type
  
  Throws:
  
  IllegalArgumentException - if an EventType with "null" name and under this supertype exists
- EventType
```
public EventType(EventType<? super T> superType,
                 String name)
```
  Constructs a new EventType with the specified super type and name.
  
  Parameters:
  
  superType - the event super type
  
  Throws:
  
  IllegalArgumentException - if an EventType with the same name and superType exists

Method Detail
- getSuperType
```
public final EventType<? super T> getSuperType()
```
  Gets the super type of this event type. The returned value is null only for the EventType.ROOT.
  
  Returns:
  
  the super type
- getName
```
public final String getName()
```
  Gets the name of this event type.
  
  Returns:
  
  the name
- toString
```
public String toString()
```
  Returns a string representation of this EventType object.
  
  Overrides:
  
  toString in class Object
  
  Returns:
  
  a string representation of this EventType object.

© 2008, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from JavaFX API Documentation.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Java, JavaFX and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Class EventType<T extends Event>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ROOT

Constructor Detail

EventType

EventType

EventType

EventType

Method Detail

getSuperType

getName

toString