匿名内课 [英] Anonymous Inner class

问题描述

class One {
Two two() {
    return new Two() {
        Two(){}
        Two(String s) {
            System.out.println("s= "+s);
        }
    };
    }
}

class Ajay {
    public static void main(String ...strings ){
        One one=new One();
        System.out.println(one.two());
    }
}

上面的示例代码无法编译。它说两个无法解决。
这段代码有什么问题??

The above sample code cannot be compiled.It says "Two cannot be resolved". What is the problem in this code??

推荐答案

new Two() {
    Two(){}
    Two(String s) {
        System.out.println("s= "+s);
    }
};

匿名内部类称为匿名，因为它没有自己的名称，必须引用通过它扩展/实现的基类或接口的名称。

An anonymous inner class is called anonymous because it doesn't have its own name and has to be referred to by the name of the base-class or interface it extends/implements.

在你的例子中，你创建一个的匿名子类所以两个必须在某个地方声明为类或接口。如果已经声明了第二类，则要么在类路径中没有它，要么忘记导入它。

In your example you create an anonymous subclass of Two so Two has to be declared somewhere either as a class or interface. If the class Two is already declared you either don't have it on your classpath or forgot to import it.

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