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org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 14 in the jsp file: /login.jsp
MatchMaking cannot be resolved
11:     </head>
12:     <body>
13:         <%
14:        Connection con = MatchMaking.connect();
15:        String name = request.getParameter("vorname");
16:        String pass = request.getParameter("passwort");
17:


An error occurred at line: 18 in the jsp file: /login.jsp
XYZ cannot be resolved to a type
15:        String name = request.getParameter("vorname");
16:        String pass = request.getParameter("passwort");
17:
18:        XYZ user = MatchMaking.login(con, name, pass);
19:         %>
20:
21:         <%


An error occurred at line: 18 in the jsp file: /login.jsp
MatchMaking cannot be resolved
15:        String name = request.getParameter("vorname");
16:        String pass = request.getParameter("passwort");
17:
18:        XYZ user = MatchMaking.login(con, name, pass);
19:         %>
20:
21:         <%