Getting NullPointeException while running the Selenium test script - selenium-webdriver

Question

I am getting the NullPointerException after executing the below testng test script. After launching the URL when it comes inside the test script method then, it is throwing the exception. Can you please help me out in this.
(Object Repo) LakesAndMountainsHomePage.java :-
import org.openqa.selenium.WebElement;
import org.openqa.selenium.support.FindBy;
import org.openqa.selenium.support.PageFactory;
import com.actitime.genericlib.WebDriverCommonLib;
public class LakesAndMountainsHomePage extends WebDriverCommonLib{
WebDriver driver;
public LakesAndMountainsHomePage(WebDriver driver)
{
this.driver = driver;
PageFactory.initElements(driver, this);
}
#FindBy(xpath= "//*[#id='the-main-menu']//*[contains(text() , 'LAKES &
MOUNTAINS')]")
WebElement LandM;
public WebElement LandMHeader()
{
System.out.println("came inside the method");
//LandM.isDisplayed();
return LandM;
}
}
BaseTest.java:-
public abstract class BaseTest {
ExcelLib eLib;
WebDriverCommonLib wLib;
WebDriver driver;
HomePage homepage;
#BeforeClass
public void baseBeforeClass()
{
eLib = new ExcelLib();
wLib = new WebDriverCommonLib();
driver=Driver.getBrowser();
driver.manage().window().maximize();
System.out.println("Browser is launched");
}
#BeforeMethod
public void launchURL()
{
wLib.homePage();
//loginPage.loginToAPP();
System.out.println("Navigated to the URL");
}
}
Testscript:-
public class LakesAndMountainsHomePageTest extends BaseTest{
LakesAndMountainsHomePage lm = new LakesAndMountainsHomePage(this.driver);
//TC TC131409 [New Lakes & Mountains Tab] : Verify New Lakes & Mountains
Tab is displayed in header.
#Test(priority=0)
public void lakesAndMountainsHeader()
{
boolean a= lm.LandMHeader().isDisplayed(); //getting exception here
if(a==true)
{
System.out.println("Lakes And Mountains tab is present in the HomePage");
}
else
{
System.out.println("Lakes And Mountains tab is not present in the
HomePage");
}
lm.LandMHeader().click();
System.out.println("It has clicked the tab");
}
}
And below is the exception stack trace:-
below is the exception stacktrace:-
java.lang.NullPointerException
at org.openqa.selenium.support.pagefactory.DefaultElementLocator.findElement(DefaultElementLocator.java:69)
at org.openqa.selenium.support.pagefactory.internal.LocatingElementHandler.invoke(LocatingElementHandler.java:38)
at com.sun.proxy.$Proxy9.isDisplayed(Unknown Source)
at com.acttime.usertest.LakesAndMountainsHomePageTest.lakesAndMountainsHeader(LakesAndMountainsHomePageTest.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:669)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:877)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1201)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:776)
at org.testng.TestRunner.run(TestRunner.java:634)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:425)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:420)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:385)
at org.testng.SuiteRunner.run(SuiteRunner.java:334)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1318)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1243)
at org.testng.TestNG.runSuites(TestNG.java:1161)
at org.testng.TestNG.run(TestNG.java:1129)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
I am getting the NullPointerException after executing the below testng test script. After launching the URL when it comes inside the test script method then, it is throwing the exception. Can you please help me out in this.

Answer 1

This instantiation is illegal.
LakesAndMountainsHomePage lm = new LakesAndMountainsHomePage(this.driver);
It is the root cause of Null pointer exception.
Move this statement to BaseTest class, create a class field and instantiate inside #BeforeClass method . Also, remove this operator.

Answer 2

Well i'am unable to see the implementation of a driver class specifying the type of driver(firefox,chrome,IE) being initialized.