Cannot invoke "org.openqa.selenium.WebDriver.findElement(org.openqa.selenium.By)" because "this.driver" is null

when I try to run below code in testNg null pointer exception shown in Eclipse

public class ImgDDChkbxRadio  {
    WebDriver driver;
    
    @BeforeTest
    public void LaunchBrowser()
    {
        System.setProperty("webdriver.chrome.driver","F:\\chromedriver_win32\\chromedriver.exe");
        WebDriver driver=new ChromeDriver();
        driver.manage().window().maximize();
        driver.get("http://www.leafground.com/");
    }   
    @Test
    public void Img()
    {   
        driver.findElement(By.xpath("//img[@src='images/image.png']")).click();
        driver.findElement(By.xpath("//*[@src=\"../images/home.png\"]")).click();
        driver.navigate().back();
        driver.findElement(By.xpath("//*[@src=\"../images/abcd.jpg\"]")).click();
        
    }
}

It could be the the site is not being loaded - are you able to launch the site manually?

If yes try this:

• Make WebDriver object static (write static before the variable name)
• Try to add Thread.Sleep(5000) to LaunchBrowser method, after you open the site using the browser

Just remove the WebDriver from LaunchBrowser() and I hope this will work for you ;)

    public class ImgDDChkbxRadio  {
    WebDriver driver;
    
    @BeforeTest
    public void LaunchBrowser()
    {
        
    System.setProperty("webdriver.chrome.driver","/Users/chrome/chromedriver");
        driver=new ChromeDriver();
        driver.manage().window().maximize();
        driver.get("http://www.leafground.com/");
    }   
    @Test
    public void Img()
    {   
        driver.findElement(By.xpath("//img[@src='images/image.png']")).click();
        driver.findElement(By.xpath("//*[@src=\"../images/home.png\"]")).click();
        driver.navigate().back();
        driver.findElement(By.xpath("//*[@src=\"../images/abcd.jpg\"]")).click();
        
    }
}