JAVA中类的引用大小 [英] Size of reference of an class in JAVA

问题描述

Java中类的引用大小是多少?对于特定的JVM和OS，它是否不变，而与引用所针对的类无关.

What is the size of reference of a class in Java? Is it constant for a particular JVM and OS irrespective of the class for which the reference is made.

Class A
Class B
Class C

---

A a;
B b;
C c;

a ， b 和 c 的大小是否相同，而与 A ， B 和 C 类?

Are the size of a, b and c the same irrespective of the size of A, B and C classes?

推荐答案

是的，所有引用都是对象的指针"或对象的间接指针".它们的实际内存大小是JVM的实现细节，但是您可以确保它们在不同类中的大小相等.

Yes, all references are "pointers" to Objects or indirect "pointers to pointers" to Objects. Their actual in memory size is an implementation detail of the JVM but you can be sure that they are equal in size for different classes.

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