javamail can't read sum mail

javamail can't read sum mail

I have a class with here i read my email (gmail) code of my class
Properties props = System.getProperties();
Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore("imaps");
store.connect("imap.gmail.com", "mail@gmail.com", "pass");
Folder inbox = store.getFolder("Inbox");
inbox.open(Folder.READ_WRITE);
FlagTerm ft = new FlagTerm(new Flags(Flags.Flag.SEEN), false);
Message messages[] = inbox.search(ft);
for(Message message:messages)
{
Multipart parts = (Multipart)message.getContent();//line 26
Object p = parts.getBodyPart(0).getContent();
String q = p.toString();//object has the body content
//code
}
but i have this problem
SEVERE: "Servlet.service()" pour la servlet Login a généré une exception
java.lang.ClassCastException: java.lang.String cannot be cast to
javax.mail.Multipart
at pack.Testmail.<init>(Testmail.java:26)
at pack.Login.doGet(Login.java:39)
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:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
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:849)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Unknown Source)