Hi android expert, Could someone tell me how to fix the following error? Thanks

target Java:xxxxxx (out/target/common/obj/APPS/xxxx_intermediates/ classes) Note: Some input files use or override a deprecated API. Note: Recompile with -Xlint:deprecation for details. Note: Some input files use unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. target Dex: i-jetty

trouble processing "javax/servlet/SingleThreadModel.class":

Attempt to include a core VM class in something other than a core library. It is likely that you have attempted to include the core library from a desktop virtual machine into an application, which will most assuredly not work. If you really intend to build a core library -- which is only appropriate as part of creating a full virtual machine binary, as opposed to compiling an application -- then use the "--core-library" option to suppress this error message. If you go ahead and use "--core-library" but are in fact building an application, then please be aware that your build will still fail at some point; you will simply be denied the pleasure of reading this helpful error message. 1 error; aborting make: *** [out/target/common/obj/APPS/xxxxx_intermediates/classes.dex] Error 1