In the javadoc it says that EventListener is
在javadoc中它表示EventListener是
"A tagging interface that all event listener interfaces must extend."
“所有事件监听器接口必须扩展的标记接口。”
Why is that? What's the significance of making a custom listener implement EventListner? Is there any special handling for EventListner somewhere?
这是为什么?使自定义侦听器实现EventListner的重要性是什么? EventListner在某处有什么特殊处理吗?
2 个解决方案
#1
5
It’s only important if you want to use an EventListenerList or an EventListenerProxy. I like to use it on my own event listener interfaces as well, though. It makes the purpose of the interface much clearer.
如果要使用EventListenerList或EventListenerProxy,这一点非常重要。我喜欢在我自己的事件监听器接口上使用它。它使界面的目的更加清晰。
#2
7
Probably used by javabeans introspection.
可能由javabeans内省使用。
For instance Netbeans beaninfo editor does not recognise the event if extends EventListener is missing from the Listener.
例如,如果监听器中缺少扩展的EventListener,则Netbeans beaninfo编辑器无法识别该事件。
#1
5
It’s only important if you want to use an EventListenerList or an EventListenerProxy. I like to use it on my own event listener interfaces as well, though. It makes the purpose of the interface much clearer.
如果要使用EventListenerList或EventListenerProxy,这一点非常重要。我喜欢在我自己的事件监听器接口上使用它。它使界面的目的更加清晰。
#2
7
Probably used by javabeans introspection.
可能由javabeans内省使用。
For instance Netbeans beaninfo editor does not recognise the event if extends EventListener is missing from the Listener.
例如,如果监听器中缺少扩展的EventListener,则Netbeans beaninfo编辑器无法识别该事件。