在运行时确定JVM可执行文件的位置 [英] Determining location of JVM executable during runtime

问题描述

如何在运行时获取当前运行的JVM的可执行文件的位置？我想使用ProcessBuilder类将另一个JVM实例化为子进程。

How does one obtain the location of the executable of the currently running JVM during runtime? I would like to instantiate another JVM as a subprocess using the ProcessBuilder class.

我知道有 java.home 系统属性，但这不指定JVM可执行文件的位置。我知道我可以做这样的事情来获得路径：

I am aware that there is the java.home System property, but this doesn't specify the location of the JVM executable. I understand I could do something like this to get the path:

System.getProperties（）。getProperty（java.home）+ File .pathSeparator +bin+ File.pathSeparator +java

此代码与平台无关，因为Windows可执行文件的名称是 java.exe ，而不是 java 。有没有办法获得将平台的特性考虑在内的JVM可执行文件的路径？

This code isn't platform independent, because the Windows executable's name is java.exe, not java. Is there a way to get the path of the JVM executable that takes the platform's idiosyncrasies into account?

推荐答案

你可以随时使用os.name来检查用户是否正在运行Windows。这适用于OS X，Linux和Windows

You could always just use os.name to check if the user is running Windows or not. That'll work on OS X, Linux and Windows at

String jvm_location;
if (System.getProperty("os.name").startsWith("Win")) {
    jvm_location = System.getProperties().getProperty("java.home") + File.separator + "bin" + File.separator + "java.exe";
} else {
    jvm_location = System.getProperties().getProperty("java.home") + File.separator + "bin" + File.separator + "java";
}

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