java - How to get data fron beanclass in springMVC? -

how data beanclass in springmvc? trying got error.

in spring mvc didnt data bean class

this bean class

    public class emailbean     {         private long id;         private string from;         private string to;         private string subject;         private string content;         private string status;          //getter , setter     } 

this email sender

    public class emailsender extends thread     {         private emailbean eb;          public emailbean geteb()         {             return eb;         }          public void seteb(emailbean eb)         {             this.eb = eb;         }          public void run()         {             sendsingleemail(eb);         }          public static void sendsingleemail(emailbean eb)         {              system.out.println(eb.getto());             system.out.println(eb.getsubject());             system.out.println(eb.getcontent());          }     } 

this main class

    public class testmail {          public static void main(string[] args)         {              try             {                 emailbean eb=new emailbean();                 eb.setfrom("xxx@gmail.com");                 eb.setto("yyyyy@gmail.com");                 eb.setsubject("testing email subject");                 eb.setcontent("testing email content");                 eb.setid(1l);                 eb.setstatus("100");                  emailsender es=new emailsender();                  es.start();             }             catch (exception e)             {                 e.printstacktrace();             }         }        } 

when run testmail wont work why? git error

    exception in thread "thread-0" java.lang.nullpointerexception         @ com.candidjava.springmvc.service.emailsender.sendsingleemail(emailsender.java:36)         @ com.candidjava.springmvc.service.emailsender.run(emailsender.java:30) 

just simple mistake made in main method, before starting thread call setter method set emailbean information, find below correct code

 public class testmail {      public static void main(string[] args)     {          try         {             emailbean eb=new emailbean();             eb.setfrom("xxx@gmail.com");             eb.setto("yyyyy@gmail.com");             eb.setsubject("testing email subject");             eb.setcontent("testing email content");             **eb.setid(1l);**             eb.setstatus("100");              emailsender es=new emailsender();             es.seteb(eb);             es.start();         }         catch (exception e)         {             e.printstacktrace();         }     }    } 

if new spring mvc try simple spring hello world example understand basic