Java中的对象与引用 [英] Object vs Reference in Java

问题描述

在Java中，如果我声明，

In Java, if I declare,

MyClass obj;

obj被称为引用"还是对象".我不在这里实例化课程.

Is obj called a "reference" or an "object". I am not instantiating class here.

推荐答案

obj是对MyClass实例的引用.

obj is a Reference to an instance of MyClass.

当前，该Reference为NULL，因为您尚未将其分配为引用任何实例.

Currently, that Reference is NULL because you haven't assigned it to refer to any instance.

从技术上讲，MyClass必须是Object的子类，因此可以说obj也是对Object实例的引用.

Technically MyClass must be a subclass of Object, so it is possible to say that obj is a Reference to an instance of Object as well.

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