Does JavaWebServer2.0 support all java2.0 features??

[Rajesh Kumar Singh]

Dear friends ...I'm using JavaWebServer2.0 (downloaded )...in my Servlet programme    when i used HashSet it didn't give any problem while compiling(obviously    as i'm using jdk1.2 ) but it gave  runtime error with the message::      ""reported this exception: java/util/HashSet. Please report this to the administrator of the web server. java.lang.NoClassDefFoundError: java/util/HashSet at PTRProblemEntryScreen.doGet(Compiled Code)..... ""   ...PTRProblemEntryScreen.java is my programme name..... ...does JWS2.0 support this OR can anyone there please suggest what to do..i mean , can i change some options of JWS2.0 to correct it???? PLEASE GET BACK SOON IF U HAVE SOME SUGGESTIONS ......   thanx Rajesh ([EMAIL PROTECTED])