I have applications that require the JDK-12 of Java. I used to run my applications in the OpenJDK Java 8 Runtime (those were SWIFT applications, so all I had to do, was double click on them). But now, I have to install the new JDK in order to run this application. But, they automatically open with Archive Manager.
I'm pretty sure that I installed JDK 12 and later tried out JAVA alone. I tried using the old OpenJDK 8 but of course it cannot open my applications for Java 12.
How can I run my applications in the new Ubuntu 18 with JDK-12?