error IndexOutOfBoundsException dans ma jsp

Bonjour à tous,

j'ai un soucis. j'ai une erreur java.lang.IndexOutOfBoundsException mais je ne vois pas où est mon erreur.
Dans ma console je n'obtiens que les 4 premiers sur les 13 resultats.

pouvez-vous m'aider?
merci d'avance.

voici mon code:

Code:

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List<String> listanswer = (List<String>) request.getAttribute("listanswer");
List<Integer> listquestionanswerId = (List<Integer>) request.getAttribute("listquestionanswerId");
List<Integer> listquestionId = (List<Integer>) request.getAttribute("listquestionId");
 
for(Integer questId : listquestionId){
	for(Integer respId : listquestionanswerId){
		if(questId == respId ){
			System.out.println("result: "+questId +"=="+ respId);
			if(listanswer.contains("JA") ){
				i++;
			}
			if (listanswer.contains("NEE") ){
				j++;
			}
		}
	}
}

et voici le message d'erreur:

Code:

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31-janv.-2013 14:09:31 org.apache.catalina.core.ApplicationDispatcher invoke
GRAVE: "Servlet.service()" pour la servlet jsp a lancé une exception
java.lang.IndexOutOfBoundsException: Index: 13, Size: 13
	at java.util.ArrayList.RangeCheck(ArrayList.java:547)
	at java.util.ArrayList.get(ArrayList.java:322)
	at org.apache.jsp.jsp.capitest_jsp._jspService(capitest_jsp.java:422)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
	at student.Capi.doGet(Capi.java:130)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:404)
	at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:136)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:619)