Unable to solve ContentFilterTest class compile time error in eclipse

Hi Friends,

         I have port  openfire source code in eclipse successfully. All the compile time error solved successfully except ContentFilterTest class related error.

       Statement : junit.textui.TestRunner.run(ContentFilterTest.class);

       Error: The method run(Class<? extends TestCase>) in the type TestRunner is not applicable for the arguments (Class<ContentFilterTest>)

       Statement :

                         filter.clearMask();

                         filter.clearPatterns();

       Error :The method clearMask() is undefined for the type ContentFilter

       Please help to solve error.

Thanks in advance.