通常使用Scala闭包实现Java Single-Abstract-Method接口？ [英] Generically implementing a Java Single-Abstract-Method interface with a Scala closure?

问题描述

据我了解，当它们最终出现时，我们将能够用Java闭包代替等效的单方法接口。是否有标准的Scala习惯用法做同样的事情 - 使用Scala闭包实现Java Single Abstract Method接口？

As I understand it, when they finally come along, we will be able to substitute a Java closure for the equivalent single-method interface. Is there a standard Scala idiom for doing the same - implementing a Java Single Abstract Method interface with a Scala closure?

理想情况下，我希望以下内容能够自动运行

Ideally I'd like the following to automagically work

test("Closure") {
  var event: PropertyChangeEvent = null
  var label = new JLabel()
  label.addPropertyChangeListener( {e: PropertyChangeEvent => event = e} )
  label.setText("fred")
  event.getNewValue should be ("fred")
}

推荐答案

1月份对此进行了长时间的讨论。

There was a lengthy discussion about this in January.

http：//www.scala- lang.org/node/8744

这个想法很受欢迎，甚至比这个提案更进一步。但是魔鬼在细节中，原型实施可能会在此提案中找到其他问题。

The idea was well received, and even taken a bit further than this proposal. But the devil is in the details, and a prototype implementation may yet find other problems with this proposal.

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