例如，在匿名内联类的主体中，只能调用外部类中的 final 对象引用。

For example, only final object references from the outer class are invokable within the body of the anonymous inner class.

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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。

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

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