Java Project migration from Eclipse (3.2+) to JDeveloper (11.x)

I want to import/modify an Eclipse's java project into JDeveloper and use it. I see that there are some fundamental differences between the Eclipse and JDeveloper projects. Some of the differences like plugin.xml vs extension.xml, non-existance of .classpath and etc... makes it little difficult to take a Eclipse's java project and import it in to the JDeveloper to make it work. I am hoping that there is a mapping between the Eclipse's plugin.xml, JDeveloper's extension.xml, so that project migration is easier among these.
Of course i have limited knowledge of JDeveloper, so would like to get some expert's opinion on this. Any automatic plugin or any sorts of tips or advise is appreciated.
Edited by: SureshKrishna on Jan 19, 2009 8:52 AM

When i import the source code and try to compile i get huge number of compilation errors as below. Below are only few examples. I have set the external libraries and jars for all the related projects. Any idea or pointers why the code with Generics has problem.
Thanks,
Krishna
Error(466,27): method load(com.xxx.base.api.datatypes.EntityId<?>) not found in class com.xxx.base.support.schema.MaintenanceObjectInfo
Error(234,50): method copyEntity(E, java.util.Map<java.lang.String,java.lang.Object>, com.xxx.base.api.datatypes.EntityId<E>, com.xxx.shared.environ.DataElementDefinition, java.lang.String) in class com.xxx.base.domain.common.metaDataUserInterfaceReference.MetaDataUserInterfaceReferenceMaintenance_Gen cannot override method copyEntity(E, java.util.Map<java.lang.String,java.lang.Object>, com.xxx.base.api.datatypes.EntityId<E>, com.xxx.shared.environ.DataElementDefinition, java.lang.String) in class com.xxx.base.support.pagemaintenance.AbstractPageMaintenance with different return type, was E
Error(58,38): incompatible types; found: class com.xxx.base.api.datatypes.StringId<com.xxx.base.domain.common.metaDataService.MetaDataService>, required: class com.xxx.base.domain.common.metaDataService.MetaDataService_Id
Error(229,49): method createDTO(java.lang.Class<T>) not found in interface com.xxx.base.support.context.Session
Error(54,49): type parameter E is out of bounds
Error(41,37): method getInfo(com.xxx.base.api.datatypes.EntityId<?>) not found in interface com.xxx.base.domain.common.foreignKeyReference.ForeignKeyReference

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