Years ago, someone reported the annoying confusing behavior in 7.5 when they tried to create a jvm 1.6-compliant Web Project to run under Java EE5.0. It's still a problem under 9.1.
We're using version 6 with EE 5. I don't even have a 1.5 jdk on my dev box. I just created a Web Project several times t0 verify MyEclipse behavior. I select File > New > Web Project. Then, I enter a name, note that the default Java EE 5.0 is still selected, and click Finish. It pops the Incompatible Java Compliance Level box:
Compiler compliance ... should be 5.0. Your ... default is 6.0. Do you want to use a custom setting for your project?
If I click No, the box goes away and my project is created. If I display its properties, the compliance level is set to 1.5, the Use default... box is checked, the shadowed values show 1.5, and there's an alert message about my lack of a 1.5 jdk.
If I click Yes, I get the same results.
There is also a link "Open workspace compiler settings". If I click the link, it shows my workspace settings including (gasp!) compiler compliance 1.6. When I click OK there, that window and the popup both disappear and my project is created. With a compliance level of 1.5. Of course.
The message in the box should be changed. It should be possible to create a Web Project (or other EE project) with the workspace default compliance level. Just in case a user wants a different compliance level for EE projects, there should be a workspace setting for the EE compliance level.
I looked at the Web Project tutorial just to see if this issue was mentioned there. (It isn't.) The tutorial should be updated to show more current pictures, etc.