Getting Null Pointer Exception with Extent Reports - selenium

Question

I m trying to run a small test program with Extent Reports but getting Null Pointer Exception. If i am running this code, without using Extent Report functionality it's working fine. Kindly help.
Below is my code-
package selenium.ExtentReports;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import com.aventstack.extentreports.ExtentReports;
import com.aventstack.extentreports.reporter.ExtentSparkReporter;
import io.github.bonigarcia.wdm.WebDriverManager;
public class ExtentReportDemo {
ExtentReports extent;
WebDriver driver;
#BeforeTest
public void config() {
WebDriverManager.chromedriver().setup();
driver = new ChromeDriver();
String path = System.getProperty("user.dir") + "//Reports//index.html";
ExtentSparkReporter reporter = new ExtentSparkReporter(path);
reporter.config().setReportName("Web Automation Results");
reporter.config().setDocumentTitle("Test Results");
ExtentReports extent = new ExtentReports();
extent.attachReporter(reporter);
extent.setSystemInfo("Tester", "Gaurav Singh");
}
#Test
public void initialDemo() {
extent.createTest("Initial Demo");
driver.get("https://rahulshettyacademy.com");
System.out.println(driver.getTitle());
extent.flush();
}
}
Error which i am getting
FAILED: initialDemo
java.lang.NullPointerException
at selenium.ExtentReports.ExtentReportDemo.initialDemo(ExtentReportDemo.java:38)

Answer 1

I have just instantiate the extent variable outside the clas. And it's working for me now.
ExtentReports extent = new ExtentReports();

Answer 2

ExtentReports extent = new ExtentReports();
Don't initialize in #BeforeTest methods once you declared it Publicly. Instead Use :
extent = new ExtentReports();