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class User{scanner Scanner = new Scanner (system.in);p ublic Abstract void introduction ();}Superuser.javapackagecom;importjava.sql.resultset;importjava.sql.sqlexception;classsuperuser Extendsuser{publicvoidintroduction () {System.out.println ("you ' Retheadministrator ofthissystem. "); System.out.println ("Yourrightsareasfollow:"); System.out.println ("A-addanuser."); System.out.println ("D-deleteanuser"); System.out.println ("E-editanuserinfomation"); System.out.println ("S-searchusers"); Sys