Unable to read from Process.StandardOutput-Collection of common programming errors

12 years ago
admin
1 minute

You can read the currently installed Java version from the registry as well. The following file includes the method TryGetJavaHome, which supports 32- and 64-bit virtual machines for specific vendor/installation combinations.

bool TryGetJavaHome(
    RegistryView registryView,
    string vendor,
    string installation,
    out string javaHome)

Vendors:

  • “JavaSoft” (HotSpot)
  • “JRockit”

Installations:

  • “Java Runtime Environment”
  • “Java Development Kit”

If you look at the code for the method, you’ll find the following line which obtains the current version.

object currentVersion = javaKey.GetValue("CurrentVersion");

This will return a value like “1.7” or “1.6”. If want a more complete version number, some installations provide the following.

object familyVersion6 = javaKey.GetValue("Java6FamilyVersion");
object familyVersion7 = javaKey.GetValue("Java7FamilyVersion");

For some installations, the family version is not present, but for the standard runtime installation I see the values “1.6.0_38” and “1.7.0_13”.

Reference: Antlr4ClassGenerationTaskInternal.cs