与 Java 相关的 jvm.cfg 文件的目的是什么? [英] What is the purpose of jvm.cfg file in relation to Java?

问题描述

它有一些奇怪的关键字.请说明文件的一般用途.

It has some strange keywords. Please explain the general purpose of the file.

推荐答案

简短版本:

控制在调用 java 或 javac 时可以使用启动标志选择的 JVM.

Short version:

Controls the JVMs which may be picked with startup flags when invoking java or javac.

让我们从评论开始

# List of JVMs that can be used as an option to java, javac, etc.
# Order is important -- first in this list is the default JVM.
# NOTE that this both this file and its format are UNSUPPORTED and
# WILL GO AWAY in a future release.

所以我们有一个JVM"列表要传递给 java/javac.我们需要在这个文件的上下文中阐明 JVM 是什么.

So we have a list of 'JVM's to pass to java/javac. We need to clarify what a JVM is in the context of this file.

让我们看一个简单的线条:

Let's take one simple line:

-green ERROR

和实验

java -green > /dev/null
Error: green VM not supported

因此 ERROR 标志似乎表示不支持的配置.

So it seems that the ERROR flag signals an unsupported configuration.

让我们继续

-classic WARN

并执行

java -classic > /dev/null
Warning: classic VM not supported; client VM will be used

似乎WARN"会将我们发送到默认的 JVM，这对我们来说似乎是客户端".

Seems that 'WARN' will send us to the default JVM which seems to be 'client' for us.

那我们可以看看第一行

-client IF_SERVER_CLASS -server

这似乎表明默认是服务器除非机器是服务器类.

which seems to signal that the default is server unless the machine is a server-class.

下一个是

-server KNOWN

这意味着服务器 JVM 是已知的.

which means that the server JVM is known.

最后

-hotspot ALIASED_TO -client

表示热点相当于客户端.

means that hotspot is equivalent to client.

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