Eclipse如何找到JRE或JDK位置？ [英] How Does Eclipse find the JRE or JDK locaton?

问题描述

根据Eclipse FAQ。我读到

Eclipse不要查阅JAVA_HOME环境变量。

我的疑问是eclipse如何初始化虚拟机。它不知道 Java 的位置。我的 eclipse.ini 文件没有 -vm 配置。仍然能够运行eclipse。

来源

更新

根据Eclipse 安装指南。 Eclipse不会将条目写入Windows注册表。

解决方案

据我所知，为了调用JVM，Eclipse执行 java 命令，如果是在系统执行路径下，Eclipse将不需要找到安装目录。

要检查，可以启动一个OS shell并执行下一个命令从任何位置）：

 > java -version 
  

编辑：我（部分）错了。从常见问题解答（ http://wiki.eclipse.org/FAQ_How_do_I_run_Eclipse%3F#Find_the_JVM ）

如果在eclipse / jre目录中安装了JVM，Eclipse将使用
它;否则启动器将参考eclipse.ini文件和
系统路径变量

所以，Eclipse首先看看它的日食/ jre dir for installed VMs，如果为空，请查阅eclipse.ini文件，最后查看系统路径。

According to the Eclipse FAQ. I read that

Eclipse DOES NOT consult the JAVA_HOME environment variable.

My doubt is how does eclipse initializes the Virtual Machine. It does not know the location of Java. My eclipse.ini file does not have -vm configuration. Still I am able to run eclipse.

The Source

UPDATE

According to Eclipse Installation Guide. Eclipse does not write entries to the Windows registry.

解决方案

As far as I know, to invoke the JVM, Eclipse executes the java command, so, if it's at your system execution path, Eclipse won't need to find the instalation directory.

To check, you can start a OS shell and execute the next command (from any location):

> java -version

EDIT: I was (partially) wrong. From the FAQ (http://wiki.eclipse.org/FAQ_How_do_I_run_Eclipse%3F#Find_the_JVM)

If a JVM is installed in the eclipse/jre directory, Eclipse will use it; otherwise the launcher will consult the eclipse.ini file and the system path variable

So, Eclipse first looks inside its eclipse/jre dir for installed VMs, if empty, consults the eclipse.ini file, and at last, looks at the system path.

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