Java.lang.NumberFormatException when sending mails

Question

Gurus,
I am using java mail 1.4 to send mails from my application and the code to do so is
    public void postMail(String recipient, String message) {
        logger.fine("in postMail method..");
        boolean debug = true;
        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.host", ConfigProperty.getProperty("mail.smtp.host"));
        props.put("mail.smtp.auth","true");
        props.put("mail.smtp.port", ConfigProperty.getProperty("mail.smtp.port"));
        props.put("mail.smtp.from", ConfigProperty.getProperty("mail.from"));
        Session session = Session.getDefaultInstance(props, null);
        session.setDebug(debug);
        Message msg = new MimeMessage(session);
        try {
            String from = ConfigProperty.getProperty("mail.from").trim();
            InternetAddress addressFrom = new InternetAddress(from);
            msg.setFrom(addressFrom);
            InternetAddress addressTo = new InternetAddress(recipient);
            msg.addRecipient(Message.RecipientType.TO, addressTo);
            msg.setSubject(ConfigProperty.getProperty("mail.subject"));
            msg.setContent(message, "text/plain");
            logger.info("Sending mail now...............................");
            Transport trans = session.getTransport("smtp");
            trans.connect("casarray.arg.ae",username,password);
            trans.send(msg);
        } catch (Exception e) {
            e.printStackTrace();
    }However i am getting the strange error when sending mails. My email is is very simple [email protected]
Please help me understand the issue here
java.lang.NumberFormatException: For input string: ""
     at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
     at java.lang.Integer.parseInt(Integer.java:470)
     at java.lang.Integer.parseInt(Integer.java:499)
     at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:398)
     at javax.mail.Service.connect(Service.java:288)
     at javax.mail.Service.connect(Service.java:169)
     at com.roadMiles.view.util.EmailNotification.postMail(EmailNotification.java:54)
     at com.roadMiles.view.unsecure.page.bean.LoginPageBean.forgotPassword(LoginPageBean.java:180)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at com.sun.el.parser.AstValue.invoke(Unknown Source)
     at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)
     at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:46)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
     at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190)
     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)
     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)
     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)
     at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:102)
     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)
     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)
     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)
     at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:96)
     at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475)
     at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._invokeApplication(LifecycleImpl.java:788)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:306)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:186)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:106)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
     at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177)
     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:175)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)
     at java.security.AccessController.doPrivileged(Native Method)
     at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
     at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)
     at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)
     at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)
     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)

Answer 1

The error message is telling you exactly what's wrong:
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:470)
at java.lang.Integer.parseInt(Integer.java:499)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:398)
at javax.mail.Service.connect(Service.java:288)
at javax.mail.Service.connect(Service.java:169)
at com.roadMiles.view.util.EmailNotification.postMail(EmailNotification.java:54)At line 54 of EmailNotification.java (which I assume is your class), you're calling connect(), but that fails, because, deeper down, it's trying to parse the empty String ("") as a number. So don't pass the empty String to connect(); pass a valid number instead.