Java：引用意味着多少内存？ [英] Java: How much memory a reference implies?

问题描述

正如问题所说，在Java编程语言中对一个对象的引用使用了多少内存？

As the question says, how much memory is used for a reference to an Object in the Java Programming Language?

如果你有一个可靠的来源，请更好。

Please, if you have a trusted source is better.

非常感谢！

推荐答案

它没有指定语言或JVM规范。但是，通常认为任何理智的实现在32位计算机上都是4个字节，在64位计算机上是4到8个字节（取决于压缩指针设置等）。

It's not specified by the language or JVM spec. However, it's generally accepted that any sane implementation will be 4 bytes on a 32-bit machines and between 4 and 8 bytes (depending on compressed pointer settings, etc.) on a 64-bit machine.

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