Map接口是否扩展或实现其他接口或类?

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英文:

Does Map interface extend or implement some other interface or class?

问题

Map接口不实现Collection接口。那么Map实现或扩展了什么?它是否直接扩展了Object类?

英文:

We know that Map interface does not implement Collection interface. Then what does Map implement or extend? Does it extend Object class directly?

答案1

得分: 1

Map 不扩展任何接口;它被定义为自己的接口。

在Java中,接口 不扩展 ,只扩展其他接口。从技术上讲,Java中的所有对象都扩展自 Object,因此实现接口的任何对象都是 Object

英文:

Related question:
https://stackoverflow.com/questions/2651819/why-doesnt-java-map-extend-collection

Map does not extend any interfaces; it is defined as its own interface.

In Java, interfaces don't extend classes, only other interfaces. Technically, all objects in Java extend Object, so any object implementing an interface is an Object.

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  • 本文由 发表于 2020年8月2日 10:10:18
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