以编程方式确定我的盒子上安装了哪些JDK/JRE [英] Programmatically determine what JDK/JRE's are installed on my box

问题描述

是否有标准方法可以做到这一点?我意识到这可能与平台有关.目前我们的产品仅在Windows上受支持-所以我想这就是我现在感兴趣的产品.我唯一能想到的就是扫描注册表或对文件系统进行爬网.扫描文件系统似乎可能需要很长时间-并且注册表可能不可靠.我应该两个都做吗?还有其他建议吗?我试图寻找一种可以做到这一点的API.

Is there a standard way to do this? I realize this can be somewhat platform dependent. Our product right now is only supported on Windows - so I suppose that's what I'm interested in right now. The only things I can think of are to either scan the registry or crawl the file system. Scanning the file system seems like it can take a really long time - and the registry can be unreliable. Should I do both? Any other suggestions? I tried to look for an API to do this with no luck.

推荐答案

首先，我将寻找JAVA_HOME环境变量(可能还有JDK_HOME，尽管那并不常见)，然后确定是哪个版本以及它是否为JDK.或JRE.

I would firstly start by looking for the JAVA_HOME environment variable (and possibly JDK_HOME although thats far less common) and then determining what version that is and whether it's a JDK or JRE.

之后，请检查常见的位置.找出系统的程序文件目录(即使是99.5％的时间，也不要仅假设它是C:\ Program Files)，然后在该目录下查找常见的安装位置(例如Java).

After that check for common instead locations. Find out the system's program files directory (don't just assume it's C:\Program Files even though it is 99.5% of the time) and look for common install locations under that (eg Java).

我不会进行详尽的搜索.

I wouldn't do an exhaustive search.

值得一问:您真的需要这种方式找到JDK吗?您能不能仅问用户他或她想使用什么JDK，并可能建议您已经找到了任何简单的JDK?

It's worth asking: do you really need to find JDKs this way? Can't you just ask the user what JDK he or she wishes to use, possibly suggesting any easy ones you've found already?

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