Null pointer exception in Java while calling the library - selenium

Question

Now i modified the code but still i am getting Null Pointer Exception
Below is my modified code
enter code here
package lib;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.BeforeMethod;
//#SuppressWarnings("unused")
public class Login {
WebDriver driver;
#BeforeMethod
void Initalisation()
{
System.setProperty("webdriver.ie.driver", "C:\\Eclipse\\IEDriverServer.exe");
DesiredCapabilities capability=new DesiredCapabilities();
capability.setCapability(InternetExplorerDriver.INTRODUCE_FLAKINESS_BY_IGNORING_SECURITY_DOMAINS, true);
InternetExplorerDriver driver=new InternetExplorerDriver(capability);
driver.get("http://segotn11540.rds.volvo.com/vss_connect_testr1/Login/Login.aspx");
}
public Login(String UserName,String BrandName)
{
driver.findElement(By.xpath("//input[#name='UserNameInputText']")).sendKeys(UserName);
driver.findElement(By.xpath("//input[#name='Brand']")).sendKeys(BrandName);
driver.findElement(By.xpath("//input[#name='CmdLogin']")).click();
String Title=driver.getTitle();
if(!Title.contains("VSS 4.0"))
{
System.out.println(UserName+""+"does not exists");
driver.quit();
}
CheckForCancel();
}
private void CheckForCancel() {
if(!driver.findElements(By.id("Cancel")).isEmpty())
{
driver.findElement(By.id("Cancel")).click();
}
}
}
Now I will create the main Java file
Blockquote
This will initalise the login with the parameters supplied
Import Login library
public class MessageBoard {
public static void main(String[] args)
{
Login login=new Login("TYP40FI","Volvo");
}
}
What is wrong in above code

Answer 1

Try to initialize the driver variable as
WebDriver driver = new WebDriver();

Answer 2

public Login(String UserName,String BrandName)
{
//Add this line in your code as you are trying in IE
driver = new InternetExplorerDriver();
driver.findElement(By.xpath("//input[#name='UserNameInputText']")).sendKeys(UserName);
driver.findElement(By.xpath("//input[#name='Brand']")).sendKeys(BrandName);
driver.findElement(By.xpath("//input[#name='CmdLogin']")).click();
String Title=driver.getTitle();
if(!Title.contains("VSS 4.0"))
{
System.out.println(UserName+""+"does not exists");
driver.quit();
}
CheckForCancel();
}

Answer 3

Debug and check: Is Initalisation() being called in the beginning?
Usually #BeforeMethod is called before test starts, so where is your #Test function. (syntax could be wrong)
If you don't really care about #Test property, that means your Main function needs to call Initalisation() before calling Login(...), otherwise the driver is not set yet (aka Null)