java - Getting Null Pointer Exception when trying to get the value from global variable -

this class stores global variables

public class globalvariables extends application { private string usertoken; private string userid; private string username;  public string getusername() {     return username; }  public string getuserid() {     return userid; }  public string getusertoken() {     return usertoken; }  public void setusername(string username) {     this.username = username; }  public void setuserid(string userid) {     this.userid = userid; }  public void setusertoken(string usertoken) {     this.usertoken = usertoken; }  } 

now setting values in login class

                globalvariables newobj = new globalvariables();                  newobj.setuserid(user_values.getstring("id"));                  newobj.setusername(user_values.getstring("name"));                  system.out.println(newobj.getuserid()); 

i getting value in systemout ,,, when try fetch value class getting null pointer exception

protected void oncreate(bundle savedinstancestate) {         // todo auto-generated method stub         super.oncreate(savedinstancestate);         setcontentview(r.layout.timetable);         textview test = (textview) findviewbyid(r.id.testing);         globalvariables newobj = new globalvariables();         system.out.println( newobj.getuserid());       } 

instead of using

`globalvariables newobj = new globalvariables();     system.out.println( newobj.getuserid());` 

use

system.out.println((globalvariables) getapplication()).getuserid());