为什么将接口声明为抽象接口? [英] Why declare an interface as abstract?

问题描述

将接口声明为抽象有什么意义?接口方法也是如此.有道理吗?

例如

公共抽象接口Presenter {public abstract void go(最终的HasWidgets容器)；}

解决方案

您是从哪里看到您发布的大量代码的，任何旧的 Java 代码库?
这就是 JLS 必须说的:>

9.1.1.1 抽象接口:
每个接口都是隐式抽象的.此修饰符已过时，不应用于新程序.

9.4 抽象方法声明:
为了与旧版本的 Java 平台兼容，允许但不鼓励，作为一种风格，多余地指定抽象修饰符用于在接口中声明的方法.

What's point of declaring an interface as abstract? Same thing for an interface method. Is there a point to it?

eg.

public abstract interface Presenter {
 public abstract void go(final HasWidgets container);
}

解决方案

Where did you come across the chunk of code you have posted, any old java code base ?
This is what the JLS has to say :

9.1.1.1 abstract Interfaces:
Every interface is implicitly abstract. This modifier is obsolete and should not be used in new programs.

9.4 Abstract Method Declarations:
For compatibility with older versions of the Java platform, it is permitted but discouraged, as a matter of style, to redundantly specify the abstract modifier for methods declared in interfaces.

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