Instance initializers allow you to execute construction code for an anonymous inner class.

实例初始化器允许您为一个匿名内部类执行构造代码。

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Here, the ActionListener implementation is defined in place, as an anonymous inner class, and directly attached to the button.

这里，ActionListener实现是适时定义的，它定义为一个匿名内部类，并直接附加到按钮上。

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This restriction is lifted in Groovy; you can change the values of variables in a containing scope from within an anonymous inner class.

Groovy则消除了这种限制，在Groovy中，匿名内部类可以修改外部的变量值。

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