如何从嵌套类Java调用方法? [英] How to call a method from a nested class, Java?

问题描述

如何调用methodTwo();来自methodOne(); ?

How to call methodTwo(); from methodOne(); ?

class Name {
    void methodOne() {
        class InnerClass {
           void methodTwo() {
           }
         }
     }
 }

谢谢！

推荐答案

您需要创建InnerClass的实例，就像其他任何实例方法都需要在其上调用它的实例一样:

You need to create an instance of the InnerClass, in the same way as any other instance method needs an instance on which to call it:

class Name {
   void methodOne() {
     class InnerClass {
       void methodTwo() {
       }
     }

     InnerClass x = new InnerClass();
     x.methodTwo();
   }
}

在执行此操作之前，请务必小心-我想我从未见过 在与之相关联的生产代码中的方法中声明了一个命名类.正常情况下，我会使用匿名内部类来处理真正简短的内容，或者使用私有静态命名类来处理较长的内容，以免使方法过长.

It's worth being careful before doing this - I don't think I've ever seen a named class declared within a method in the production code I've been associated with. Normally I'd either use an anonymous inner class for something really short, or a private static named class for anything longer, to avoid making the method too long.

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