Is there any way to avoid stop/start of tomcat when a java file is modified

Hi all,
we are developing a tool where we use java files for mediation layer and jsp files for presentation layer. so whenever i do a change in any of my java source i need to stop/start the tomcat in order to get the latest change.
is there any way to avoid this kind of stop/start.... i want the changes to get reflected immediately after i compile the file.

hai ,
i wrote a sample test.jsp and TestJava.java file and i tried callin api getValue() in TestJava.java from test.jsp.then i did some modifications to this api i.e., i changed the return type from String to int . then compiled n also touched the file but the changes didn't get reflected instead i got the followin error.
Location: /support/jsp/test.jsp
Internal Servlet Error:
javax.servlet.ServletException: com.adventnet.itm.common.TestJava: method getValue()I not found
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:508)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
     at org.apache.tomcat.core.Handler.service(Handler.java:287)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
     at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
     at java.lang.Thread.run(Thread.java:475)
Root cause:
java.lang.NoSuchMethodError: com.adventnet.itm.common.TestJava: method getValue()I not found
     at jsp._0002fjsp_0002ftest_0002ejsptest_jsp_3._jspService(_0002fjsp_0002ftest_0002ejsptest_jsp_3.java:63)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
     at org.apache.tomcat.core.Handler.service(Handler.java:287)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
     at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
     at java.lang.Thread.run(Thread.java:475)
kindly help me ASAP.......
Tanxxx in advance,
Ani

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