ComponentDataListener

All Known Implementing Classes:

ComponentDataListener.Adapter, ComponentDataListener.Listeners
```
public interface ComponentDataListener
```
Component data listener interface.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static class`	`ComponentDataListener.Adapter`	Deprecated. Since 2.1 and Java 8 the interface itself has default implementations.
`static class`	`ComponentDataListener.Listeners`	Component data listeners.

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`valueAdded(Component component, java.lang.String key)`	Called when a value has been added to a component's user data dictionary.
`default void`	`valueRemoved(Component component, java.lang.String key, java.lang.Object value)`	Called when a value has been removed from a component's user data dictionary.
`default void`	`valueUpdated(Component component, java.lang.String key, java.lang.Object previousValue)`	Called when a value has been updated in a component's user data dictionary.

- Method Detail
  - valueAdded
```
default void valueAdded(Component component,
                        java.lang.String key)
```
    Called when a value has been added to a component's user data dictionary.
    
    Parameters:
    
    component - The component that has changed.
    
    key - The key for the key/value pair that was added to this component's data dictionary.
  - valueUpdated
```
default void valueUpdated(Component component,
                          java.lang.String key,
                          java.lang.Object previousValue)
```
    Called when a value has been updated in a component's user data dictionary.
    
    Parameters:
    
    component - The component that has changed.
    
    key - The key for the value that has been updated.
    
    previousValue - The previous value for this key.
  - valueRemoved
```
default void valueRemoved(Component component,
                          java.lang.String key,
                          java.lang.Object value)
```
    Called when a value has been removed from a component's user data dictionary.
    
    Parameters:
    
    component - The component that has changed.
    
    key - The key for the key/value pair that has been removed.
    
    value - The corresponding value that was removed.