How to get the current Java version available?

Question

How do i get the current Java version available using c#?

I have been able to find a way to get the java version on my PC using C# but I need to be able to compare the installed version with the most current version available. At the moment I am unable to find an API or web service to get this information.

Hopefully someone here knows the answer to this.

Answer 1

Latest version available

You can pull the current version available for download from this page:

http://java.com/en/download/index.jsp

using this selector

.jvc0w2 > strong:nth-child(3)

A library like HTML Agility Pack for C# makes this straightforward.

Version currently installed

RegistryKey rk = Registry.LocalMachine;
RegistryKey subKey = rk.OpenSubKey("SOFTWARE\\JavaSoft\\Java Runtime Environment");

string currentVerion = subKey.GetValue("CurrentVersion").ToString();

Caveats

You will need to reconcile the formats of these two strings for comparison.

If the website I referenced to check the current version changes, you will may need to update your selector.