You can change the version of a facet
in a Java EE project by editing the facets for the project.
the Java™ compiler
version of a Java EE project involves changing the version of the Java facet.
For more information, see
Changing the Java compiler version for a Java EE project.
change the version of a facet in your project, complete the following steps:
In the Project Explorer view of the Java EE perspective, right-click the project
and then select Properties.
Select the Project Facets page in the in
the Properties window. This page lists the facets in the project
and their versions.
Click Modify Project and click the facet
you want to change.
Select the version of the facet from the drop-down box next to
the facet's name.
Click Finish to close the Modify Faceted
Project window and then click OK.