• Open a file browser
  • Navigate to the Java installation directory
  • It will be something like "C:\Program Files\Java\" as shown.
C:\
  \---Program Files
      \---Java
  • Navigate to the "Java" installation directory per the previous section
  • You should see one or more "jdk" sub-directories

Note that if there is more than one "jdk" subdir, then generally you would want to use the latest version (higher number)

So your full path will be something like this:
C:\Program Files\Java\jdk-11.0.2


Note that your actual jdk subdirectory name may be different.
C:\
  \---Program Files
      \---
1
Java \---
2
jdk-11.0.2