新手询问一个tomcat运行错误的问题

tomcat 的错误报告
Error: 500
Location: /myapp/test2.jsp
Internal Servlet Error:org.apache.jasper.JasperException: Unable to compile class for JSP???sun.tools.javac.Main ????
work\localhost_8080%2Fmyapp\_0002ftest_00032_0002ejsptest2_jsp_0.java:65: ????????
                 out.println("(+n+")+ft);
                                    ^
work\localhost_8080%2Fmyapp\_0002ftest_00032_0002ejsptest2_jsp_0.java:65: ?? ";"?
                 out.println("(+n+")+ft);
                                       ^
2 ???, 1 ??? at org.apache.jasper.compiler.Compiler.compile(Compiler.java:240)
at org.apache.jasper.runtime.JspServlet.loadJSP(JspServlet.java:412)
at org.apache.jasper.runtime.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:147)
at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:159)
at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:259)
at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:367)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:390)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:523)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:146)
at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:334)
at java.lang.Thread.run(Thread.java:595)