If you have existing EJB projects developed in JDeveloper 3.2.3, they can be easily migrated to more recent versions of JDeveloper.
To open an EJB project created in JDeveloper 3.2.3:
The .jpr file is opened in the System Navigator. The .ejx file is interpreted as an EJB module, but the name remains the same (.ejx) in the System Navigator. Any operations you would perform on an EJB module can be performed on the .ejx file.
Developing Enterprise JavaBeans
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