I have Java version 8 Update 261 on a 64 bit Windows 10 system.
What I did:
- downloaded and executed a
jnlpfile - the application was installed in the Java cache and a desktop icon was created
- the application was starting
So far, so good.
Now, after closing the app and double clicking that desktop icon - nothing happens.
However, in the Task-Manager I see that the Java Web Launcher is running. And every further double click starts another instance of it, but on the screen I see nothing.
To get the application running properly again, I can either
clear the Java cache with hook at "installed applications and applets" set:
The desktop icon is removed, the above procedure can then be repeated and works like a charm.or show the Java console

In this case double clicking the desktop icon works! The Java console opens and after some seconds the application is starting.
There's no need to clear the cache anymore.
I understand that clearing the cache can solve manifold issues, but what effect has the simple "show console" here?