Improve failed JDK detection diagnostic

[yossefEl]

Thank you in advance 😄 😃

I set up VScode as described on Extension instruction(JAVA_HOME, JDK version ..) but i still getting this error.

Environment

• Operating System: Windows 10
• JDK version: jdk1.8.0_171
• Visual Studio Code version: 1.32.1
• Java extension version: 0.40.0

Error

the VSCode settings

JDK envirenment varibale

[Eskibear]

Dude, remove the "bin" part please. Your java home should be "C:\Program Files\Java\jdk1.8.0_171" .

[muha365]

You can open command line elevated as administrator and execute the next line
SET JAVA_HOME="C:\Program Files\Java\jdk1.8.0_171"

[fbricon]

This mistake is now better captured and surfaced to the user:

The "Open Settings" action will be available only if the java.home is already being set.