How to determine from within Java which .NET framework is installed
.net-3.5, java
Solution
From what I understand, the actual file structure in c:\windows\Microsoft.Net\Framework has folders with versions of .Net installed. On my computer, I have folders up to v3.5, or c:\windows\Microsoft.Net\Framework\v3.5.
There are lots of issues with this, including security issues though.
The second, and probably better answer would be to check the windows registry.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP
The Version key will have the value you are looking for.
Edit: stackoverflow question regarding reading the registry with java. read/write to Windows Registry using Java
This library http://www.trustice.com/java/jnireg/ will allow you to read the registry.
Problem
From within my Java program I want to determine which .NET Framework is installed on the system. What is the best (and easiest) way to do this? Answer Thanks scubabbl! It worked to check the directory `System.getenv( "WINDIR" ) + "\\Microsoft.NET\\Framework"` for its directories starting with the letter "v".