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Created attachment 276381 [details] project to reproduce the error I have small problem with compilation Netbeans 8.2 sources on Eclipse 4.9.0. For some generic class eclipse displayed compilation error, but this class compilation with javac 1.8_60 successfully. And jar compilled javac 1.8_60 executed successful. For me, this is a non-critical problem - I only develop in the eclipse, but the build with Ant scripts. I make small example project to reproduce the error. Eclipse 4.9.0 display 4 error for class SyncUpdateVisitor: 1)Description Resource Path Location Type The method update(SchemaComponent, SchemaComponent, ComponentUpdater.Operation) of type SyncUpdateVisitor<T> must override or implement a supertype method SyncUpdateVisitor.java /test_eclipse_jdt_error_need_implement_method/src/org/netbeans/modules/xml/schema/model/impl/xdm line 18 Java Problem 2)The method update(SchemaComponent, SchemaComponent, int, ComponentUpdater.Operation) of type SyncUpdateVisitor<T> must override or implement a supertype method SyncUpdateVisitor.java /test_eclipse_jdt_error_need_implement_method/src/org/netbeans/modules/xml/schema/model/impl/xdm line 24 Java Problem 3)The type SyncUpdateVisitor<T> must implement the inherited abstract method ComponentUpdater<T>.update(T, T, ComponentUpdater.Operation) SyncUpdateVisitor.java /test_eclipse_jdt_error_need_implement_method/src/org/netbeans/modules/xml/schema/model/impl/xdm line 10 Java Problem 4)The type SyncUpdateVisitor<T> must implement the inherited abstract method ComponentUpdater<T>.update(T, T, int, ComponentUpdater.Operation) SyncUpdateVisitor.java /test_eclipse_jdt_error_need_implement_method/src/org/netbeans/modules/xml/schema/model/impl/xdm line 10 Java Problem If select "Add unimplemented methods" throw modal dialog with message "can not implement the missing methods, either due to compile errors can not implement the missing methods, either due to compile errors or projects build path does not resolve all dependencies". However, this is a completely self-sufficient project without external dependencies. Possibly this is a duplicate https://bugs.eclipse.org/bugs/show_bug.cgi?id=470006
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie.