从 java 中查找 java.exe 位置

Find the java.exe location from java

提问by Konstantin Tarashchanskiy

I am wondering if there is a way, from java, to find the location of the java.exe running the program?

我想知道是否有办法从 java 中找到运行程序的 java.exe 的位置？

My use case is that I am trying to have Java execute a batch script that needs JAVA_HOME to be set in the local environment. The environment that I am executing this on may not have JAVA_HOME set or even the java executable on the path, but I would assume that the JVM knows where its executable is located.

我的用例是我试图让 Java 执行一个需要在本地环境中设置 JAVA_HOME 的批处理脚本。我在其上执行此操作的环境可能没有设置 JAVA_HOME 甚至路径上的 java 可执行文件，但我假设 JVM 知道其可执行文件所在的位置。

采纳答案by Sage

 System.getProperty("java.home");

is one option. Which shows the following directory in my machine:

是一种选择。其中显示了我机器中的以下目录：

C:\Program Files\Java\jdk1.7.0_02\jre

C:\Program Files\Java\jdk1.7.0_02\jre

Most important system properties are listed here.

此处列出了最重要的系统属性。

回答by hexacyanide

The java.homeproperty will supply the path to the currently running JRE, regardless of what is installed, or what JAVA_HOMEis. See the Oracle documentation here.

该java.home属性将提供当前正在运行的 JRE 的路径，而不管安装了什么或安装了什么JAVA_HOME。请参阅此处的 Oracle 文档。

System.getProperty("java.home");