My development environment is Mint Linux 18.3 Cinamon 64 bit. I am trying to install Red Hat Developer Studio. I got a jar from here. In the link, it says that:-

For Linux development hosts:

Navigate to the folder that contains the Developer Studio JAR file.

Execute the installer: $ java -jar devstudio-12.9.0.GA-installer-standalone.jar
When execute it I got error as:-

Error: Could not find or load main class jar

So how can I install it in Linux?