Selenium java.lang.NullPointerException with PageFactory -

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i'm trying hang of pagefactory pom, not working , can not understand wrong.

this first pom class home page:

package pagefactory;  import org.openqa.selenium.webdriver; import org.openqa.selenium.webelement; import org.openqa.selenium.support.findby; import org.openqa.selenium.support.pagefactory;  public class home_page_pof {  public webdriver driver;  @findby(css = "div#header-profile a#header-profile-toggle") public webelement profiletogglebutton;  @findby(css = "form#loginuserdataform div.footer div.add-footer a.btn.btn-link.linkicon") public webelement newregistrationbutton;  public home_page_pof(webdriver driver) { this.driver = driver;  pagefactory.initelements(driver, this); }  }

this second pom class reg. page

package pagefactory;  import org.openqa.selenium.webdriver; import org.openqa.selenium.webelement; import org.openqa.selenium.support.findby; import org.openqa.selenium.support.pagefactory; import org.openqa.selenium.support.ui.select;   public class registration_page_pof {  public webdriver driver;  //personal details webelements @findby(css = "form#personaldetailsform div.profile.pe div.profile-block.simple.first fieldset#pefield-title select#pesalutation") public webelement titledropdown; public select titleselect = new select(titledropdown);  public registration_page_pof(webdriver driver) { this.driver = driver;  pagefactory.initelements(driver, this); }  }

and test case:

package tests;  import pagefactory.home_page_pof; import pagefactory.registration_page_pof; import org.openqa.selenium.webdriver; import org.openqa.selenium.chrome.chromedriver; import org.openqa.selenium.io.temporaryfilesystem; import org.openqa.selenium.support.ui.select; import org.testng.annotations.afterclass; import org.testng.annotations.beforeclass; import org.testng.annotations.test; import java.util.concurrent.timeunit;  public class test_pof {  public webdriver driver;  home_page_pof objhomepage; registration_page_pof objregpage;  @beforeclass public void browsersetup() {     system.setproperty("webdriver.chrome.driver", "d:/install/selenium-2.53.0/drivers/chromedriver.exe");     driver = new chromedriver();      driver.manage().window().maximize();     driver.manage().timeouts().implicitlywait(5, timeunit.seconds);      driver.navigate().to("http://www.lufthansa.com/");         }  @afterclass public void brosercleanup() {     if (driver != null) {         temporaryfilesystem.getdefaulttmpfs().deletetemporaryfiles();         driver.close();         driver.quit();     } }  @test public void test0001() {      objhomepage = new home_page_pof(driver);      objhomepage.profiletogglebutton.click();      objhomepage.newregistrationbutton.click();      objregpage = new registration_page_pof(driver);      select titleselect = new select(objregpage.titledropdown);      titleselect.selectbyvisibletext("mr.");  } }

so homepage objects working fine, click on 2 buttons , proceed registration page. after want select value dropdown, gives me nullpointerexception:

java.lang.nullpointerexception @ org.openqa.selenium.support.ui.select.<init>(select.java:44) @ pagefactory.registration_page_pof.<init>(registration_page_pof.java:17) @ tests.test_pof.test0001(test_pof.java:56) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:498) @ org.testng.internal.methodinvocationhelper.invokemethod(methodinvocationhelper.java:85) @ org.testng.internal.invoker.invokemethod(invoker.java:639) @ org.testng.internal.invoker.invoketestmethod(invoker.java:816) @ org.testng.internal.invoker.invoketestmethods(invoker.java:1124) @ org.testng.internal.testmethodworker.invoketestmethods(testmethodworker.java:125) @ org.testng.internal.testmethodworker.run(testmethodworker.java:108) @ org.testng.testrunner.privaterun(testrunner.java:774) @ org.testng.testrunner.run(testrunner.java:624) @ org.testng.suiterunner.runtest(suiterunner.java:359) @ org.testng.suiterunner.runsequentially(suiterunner.java:354) @ org.testng.suiterunner.privaterun(suiterunner.java:312) @ org.testng.suiterunner.run(suiterunner.java:261) @ org.testng.suiterunnerworker.runsuite(suiterunnerworker.java:52) @ org.testng.suiterunnerworker.run(suiterunnerworker.java:86) @ org.testng.testng.runsuitessequentially(testng.java:1215) @ org.testng.testng.runsuiteslocally(testng.java:1140) @ org.testng.testng.run(testng.java:1048) @ org.testng.idearemotetestng.run(idearemotetestng.java:74) @ org.testng.remotetestngstarter.main(remotetestngstarter.java:121) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:498) @ com.intellij.rt.execution.application.appmain.main(appmain.java:144)

the problem initializing varaible titleselect in class itself. initialize inside constructor or after finding element;

public class registration_page_pof {  public webdriver driver;  //personal details webelements @findby(css = "form#personaldetailsform div.profile.pe div.profile-block.simple.first fieldset#pefield-title select#pesalutation") public webelement titledropdown; public select titleselect; //dont initialize here  public registration_page_pof(webdriver driver) { this.driver = driver;  pagefactory.initelements(driver, this); titleselect = new select(titledropdown);//initialize here }  }

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