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Cannot instantiate class error message - in testNG

I used these two classes to execute my program. In one class i have kept all my variables, in another class i have kept the code to be executed. But I am unable to execute the code. I am getting error message stating that Cannot instantiate class
package BalajiSanthanamAcademy.MavenJava;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
public class CommonVariableTest {
public static WebDriver driver=null;
public String key="webdriver.chrome.driver";
public String path="C:\\Program Files\\Java\\chromedriver_win32\\chromedriver.exe";
public String baseUrl = "https://www.expedia.co.in/";
public String expUrl = "https://www.expedia.co.in/";
public String Yatra = "https://www.yatra.com/";
public String expYatra = "https://www.yatra.com/";
//yatra search
WebElement departFrom =driver.findElement(By.xpath("//input[#id='BE_flight_origin_city']"));
//Flying From class variables
public String Depature = "CJB";
public String goingTo = "MAA";
//Flying To class variables
//Declaring departure and return date
public String departureDate = "07/22/2020";
public String returnDate = "10/15/2020";
}
and below class is the one which i used to execute
package BalajiSanthanamAcademy.MavenJava;
import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.interactions.Actions;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import java.util.concurrent.TimeUnit;
import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
public class YatraLoginTest extends CommonVariableTest {
WebDriver driver;
#BeforeClass
public void setup()
{
System.setProperty(key,path);
driver = new ChromeDriver();
driver.manage().window().maximize();
driver.manage().deleteAllCookies();
driver.manage().timeouts().pageLoadTimeout(30, TimeUnit.SECONDS);
}
#Test (priority=1)
public void setBaseURL()
{
driver.get(Yatra);
System.out.println(driver.getCurrentUrl());
try{
Assert.assertEquals(expYatra, driver.getCurrentUrl());
System.out.println("Navigated to correct webpage");
}
catch(Throwable pageNavigationError)
{
System.out.println("Didn't navigate to correct webpage");
}
}
#Test (priority=2)
public void Login() throws InterruptedException
{
driver.findElement(By.cssSelector("body.wrapper-snipe.wrapper-toucan.tenantwrapper-dom.catwrapper-home:nth-child(2) div.theme-snipe:nth-child(2) div.yatra-header.headerGrp div.wrapper div.header-container.desktop-only div.header-right-menu.menu.ftL div.settings ul.justified-menu.desktop-navs.settings-content.responsivetabshow li.list-dropdown:nth-child(1) > a.dropdown-toggle")).click();
driver.findElement(By.cssSelector("#signInBtn")).click();
WebDriverWait w =new WebDriverWait(driver,10);
w.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//input[#id='login-input']")));
driver.findElement(By.xpath("//input[#id='login-input']")).click();
driver.findElement(By.xpath("//input[#id='login-input']")).sendKeys("balajimscit09#gmail.com");
Thread.sleep(2000L);
driver.findElement(By.cssSelector("#login-continue-btn")).click();
WebDriverWait x =new WebDriverWait(driver,10);
x.until(ExpectedConditions.visibilityOfElementLocated(By.cssSelector("#login-password")));
driver.findElement(By.cssSelector("#login-password")).click();
driver.findElement(By.cssSelector("#login-password")).sendKeys("Welcome-1");
driver.findElement(By.cssSelector("#login-submit-btn")).click();
}
#Test (priority=3)
public void HomepageValidation() throws InterruptedException
{
WebDriverWait Y =new WebDriverWait(driver,15);
Y.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//a[#class='dropdown-toggle loginUserName']")));
String Wel = driver.findElement(By.xpath("//a[#class='dropdown-toggle loginUserName']")).getText();
Assert.assertEquals(Wel,"Hi Balaji");
System.out.println(Wel+" = Login details Sucessfully validated");
}
#Test (priority=4)
public void yatraSearch() throws InterruptedException
{
//Round trip tab
driver.findElement(By.xpath("//a[#class='blur_class']")).click();
Thread.sleep(3000L);
//Depart from
departFrom.click();
Thread.sleep(3000L);
departFrom.sendKeys("CJB");
Thread.sleep(3000L);
departFrom.sendKeys(Keys.ENTER);
Thread.sleep(3000L);
departFrom.getAttribute("value");
//Going To
WebElement goinTo =driver.findElement(By.xpath("//input[#id='BE_flight_arrival_city']"));
Thread.sleep(3000L);
goinTo.sendKeys(goingTo);
Thread.sleep(3000L);
goinTo.sendKeys(Keys.ENTER);
driver.findElement(By.cssSelector("#BE_flight_origin_date")).click();
Thread.sleep(3000L);
WebElement element = driver.findElement(By.xpath("/html[1]/body[1]/div[2]/div[1]/section[1]/div[1]/div[1]/div[1]/section[1]/div[1]/div[1]/div[1]/div[1]/div[1]/div[2]/ul[1]/li[2]/ul[1]/li[1]/section[1]/div[1]/div[2]/div[2]/div[2]/div[1]/div[1]/div[1]/table[1]/tbody[1]/tr[2]/td[4]"));
Actions actions = new Actions(driver);
actions.moveToElement(element).click().build().perform();
Thread.sleep(3000L);
WebElement element1 = driver.findElement(By.xpath("//div[#class='month-box BE_flight_arrival_date']//div[1]//table[1]//tbody[1]//tr[2]//td[7]"));
Actions actions1 = new Actions(driver);
actions1.moveToElement(element1).click().build().perform();
driver.findElement(By.xpath("//span[#class='txt-ellipses flight_passengerBox travellerPaxBox']")).click();
for(int i=0;i<2;i++)
{
driver.findElement(By.xpath("//div[#class='iePasenger dflex']//div[1]//div[1]//div[1]//span[2]")).click();
driver.findElement(By.xpath("//div[#class='vertical_search_engine']//div[2]//div[1]//div[1]//span[2]")).click();
}
driver.findElement(By.cssSelector("#BE_flight_flsearch_btn")).click();
}
#Test (priority=5)
public void SearchValid() throws InterruptedException
{
System.out.println(driver.findElement(By.xpath("//input[#placeholder='Select Origin']")).getAttribute("value"));
System.out.println(driver.findElement(By.xpath("//input[#placeholder='Select Destination']")).getAttribute("value"));
System.out.println(driver.findElement(By.xpath("//input[#placeholder='Depart']")).getAttribute("value"));
System.out.println(driver.findElement(By.xpath("//input[#placeholder='Return']")).getAttribute("value"));
System.out.println(driver.findElement(By.xpath("//body/section[#id='flightSRP']/section/div/div/form[#id='modifySearch']/ul/li[5]/div[1]")).getAttribute("value"));
driver.findElement(By.xpath("//div[contains(#class,'result-set pr grid')]//div[2]//div[1]//div[1]//div[1]//div[4]//div[1]//div[1]//div[1]//label[1]//div[2]//i[1]")).getText();
driver.findElement(By.xpath("//section[#id='Flight-APP']//section//section//div//div//div//button")).click();
}
}
I am getting the below error message.
[RemoteTestNG] detected TestNG version 7.0.1
org.testng.TestNGException:
Cannot instantiate class BalajiSanthanamAcademy.MavenJava.YatraLoginTest
at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:30)
at org.testng.internal.InstanceCreator.instantiateUsingDefaultConstructor(InstanceCreator.java:193)
at org.testng.internal.InstanceCreator.createInstanceUsingObjectFactory(InstanceCreator.java:113)
at org.testng.internal.InstanceCreator.createInstance(InstanceCreator.java:79)
at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:109)
at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:167)
at org.testng.TestClass.getInstances(TestClass.java:102)
at org.testng.TestClass.initTestClassesAndInstances(TestClass.java:82)
at org.testng.TestClass.init(TestClass.java:74)
at org.testng.TestClass.<init>(TestClass.java:39)
at org.testng.TestRunner.initMethods(TestRunner.java:459)
at org.testng.TestRunner.init(TestRunner.java:338)
at org.testng.TestRunner.init(TestRunner.java:291)
at org.testng.TestRunner.<init>(TestRunner.java:222)
at org.testng.remote.support.RemoteTestNG6_12$1.newTestRunner(RemoteTestNG6_12.java:33)
at org.testng.remote.support.RemoteTestNG6_12$DelegatingTestRunnerFactory.newTestRunner(RemoteTestNG6_12.java:66)
at org.testng.ITestRunnerFactory.newTestRunner(ITestRunnerFactory.java:55)
at org.testng.SuiteRunner$ProxyTestRunnerFactory.newTestRunner(SuiteRunner.java:676)
at org.testng.SuiteRunner.init(SuiteRunner.java:178)
at org.testng.SuiteRunner.<init>(SuiteRunner.java:112)
at org.testng.TestNG.createSuiteRunner(TestNG.java:1275)
at org.testng.TestNG.createSuiteRunners(TestNG.java:1251)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1100)
at org.testng.TestNG.runSuites(TestNG.java:1039)
at org.testng.TestNG.run(TestNG.java:1007)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:23)
... 27 more
Caused by: java.lang.NullPointerException
at BalajiSanthanamAcademy.MavenJava.CommonVariableTest.<init>(CommonVariableTest.java:20)
at BalajiSanthanamAcademy.MavenJava.YatraLoginTest.<init>(YatraLoginTest.java:19)
... 33 more
Can you please help me how to resolve

The Root Cause is NullPointerException as shown in last few lines in your logs. The reason is this line -
public static WebDriver driver=null;
You need to create a new instance of WebDriver and assign it to the variable driver

Thank you for the co-ordination. I found the answer at last. The mistake is i have placed an web element in CommonVariableTest class, and tried to access the WebElement from YatraLoginTest class. Hence the error message wasthrown. when i removed the WebElement it is working fine.

Nullpointexception showing here that means url launched but driver instance not created to interact so to initially you have define driver driver as null

TestNG error null point exception error

Hi I am receiving following error can someone help me out with debugging below code,
package testngpackg;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
public class ARXNewTest {
ChromeDriver driver;
#BeforeMethod
public void set() {
//ProfilesIni profile = new ProfilesIni();
//FirefoxProfile testprofile = profile.getProfile("default");
// testprofile.setAcceptUntrustedCertificates(true);
//testprofile.setAssumeUntrustedCertificateIssuer(true);
System.setProperty("webdriver.chrome.driver", "C:\\Selenium Web Driver 3.0.1\\geckodriver-v0.12.0-win32\\geckodriver.exe");
WebDriver driver = new ChromeDriver();
String baseURL = "<URL>";
driver.get(baseURL);
driver.manage().timeouts().implicitlyWait(60,TimeUnit.SECONDS);
}
#Test
public void OpenBrowser() {
driver.findElement(By.linkText("Log In")).click();
driver.switchTo().frame(0);
driver.findElement(By.id("tx_username")).sendKeys("my email id");
}
}
Error
FAILED: OpenBrowser
java.lang.NullPointerException
at testngpackg.ARXNewTest.OpenBrowser(ARXNewTest.java:30)
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:100)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:646)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:811)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1129)
I am getting null point error while execution of above code

You find a NullPointerException cause driver is not getting initialized before that point. You tried to initialize a WebDriver instance inside beforeMethod() method, but it was local.
Use following code :
driver = new ChromeDriver();
Instead
WebDriver driver = new ChromeDriver();
Hope it will help you.

Here is the solution to your Question-
A few words about the Solution:
Avoid creating unnecessary instances. You have ChromeDriver driver; but not used it anywhere.
Keep your methods & code-blocks separated so that you can identify them properly.
Remove the unwanted code when you are asking for help //ProfilesIni profile = new ProfilesIni();
In System.setProperty you have mentioned the Key as webdriver.chrome.driver but you have provided the value as C:\\Selenium Web Driver 3.0.1\\geckodriver-v0.12.0-win32\\geckodriver.exe
Keep you code properly formatted so that it is easier to understand code-blocks.
Manage the opening & closing of { & } so you don't run into unexpected results.
Provide names to the methods as per the functiosn achieved through the code within. Your OpenBrowser() method have nothing to do with Browser opening.
Here is the working set of your own code with some minimal tweaks:
public class Q43910679_null_pointer
{
#BeforeMethod
public void set()
{
System.setProperty("webdriver.chrome.driver", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
String baseURL = "https://gmail.com";
driver.get(baseURL);
driver.manage().timeouts().implicitlyWait(60,TimeUnit.SECONDS);
}
#Test
public void OpenBrowser()
{
System.out.println("Open Browser Method");
}
}
Let me know if this Answers your Question.

What is this Error: at com.google.common.base.Preconditions.checkNotNull

I am a new automation tester, Working on sample test scripts, Need some help from you guys, I have tried to use POM and basic TestNG.
I have created 2 packages - pages and testcases.
I am getting some error when I am trying to access the "ClickJoin, Enterusername" methods from my pages packages. I had tried figuring out the issue, but was unable to get to why this error is occurring.
Below is the Error:
java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull
My Code from the "pages" package:
package com.gptoday.pages;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
public class Login {
public WebDriver driver;
public WebDriverWait wait;
By join = By.xpath("//*[#id='members']/a[1]");
By username = By.id("username");
By password = By.id("password");
By loginButton = By.xpath("//*[#id='normallogin']/div[4]/p/input[2]");
public Login (WebDriver driver){
this.driver=driver;
}
public void ClickJoin(){
wait = new WebDriverWait(driver,10);
//driver.findElement(join).click();
wait.until(ExpectedConditions.visibilityOfElementLocated(join)).click();
}
public void EnterUsername(){
wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.visibilityOfElementLocated(username)).click();
wait.until(ExpectedConditions.visibilityOfElementLocated(username)).sendKeys("Test username");
System.out.println("Username Entered");
}
public void EnterPassword(){
driver.findElement(password).clear();
driver.findElement(password).click();
System.out.println("Password Entered");
}
public void ClickButton(){
wait = new WebDriverWait(driver, 10);
//driver.findElement(loginButton).click();
wait.until(ExpectedConditions.visibilityOfElementLocated(loginButton)).click();
System.out.println("Login Button Clicked");
}
}
My Code from the "TestCases" package:
This code is of my base class.
package com.gptoday.com.gptoday.testcases;
import org.testng.annotations.Test;
import org.testng.annotations.BeforeMethod;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxProfile;
import org.openqa.selenium.firefox.internal.ProfilesIni;
import org.testng.annotations.AfterMethod;
import org.openqa.selenium.firefox.internal.ProfilesIni;
public class Base {
public WebDriver driver;
#BeforeMethod
public void BaseSetup(){
ProfilesIni prof = new ProfilesIni();
FirefoxProfile ffProfile= prof.getProfile ("vishvesh");
ffProfile.setAcceptUntrustedCertificates(true);
ffProfile.setAssumeUntrustedCertificateIssuer(false);
String BaseUrl = "https://www.gptoday.com";
System.setProperty("webdriver.gecko.driver", "G:/Workplace/AutomationSetupFiles/Geckdriver/geckodriver.exe");
driver = new FirefoxDriver (ffProfile);
driver.get(BaseUrl);
driver.manage().window().maximize();
}
#AfterMethod
public void afterTest() {
System.out.println("Success");
}
}
**Below the the code for the test case.**
package com.gptoday.com.gptoday.testcases;
import org.testng.annotations.Test;
import com.gptoday.pages.Login;
import org.openqa.selenium.WebDriver;
public class LoginVerification extends Base {
public WebDriver driver;
public Login obj = new Login(driver);
#Test
public void Verify()
{
obj.ClickJoin();
obj.EnterUsername();
}
}
**Error:**
Success
FAILED: Verify
java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:770)
at org.openqa.selenium.support.ui.FluentWait.<init>(FluentWait.java:96)
at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:71)
at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:45)
at com.gptoday.pages.Login.ClickJoin(Login.java:22)
at com.gptoday.com.gptoday.testcases.LoginVerification.Verify(LoginVerification.java:16)
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:661)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:744)
at org.testng.TestRunner.run(TestRunner.java:602)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
at org.testng.SuiteRunner.run(SuiteRunner.java:289)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
at org.testng.TestNG.runSuites(TestNG.java:1144)
at org.testng.TestNG.run(TestNG.java:1115)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

Here's the reason behind the error you are getting:
In both Login & EnterUsername methods while you defined the wait you have passed the instance of Webdriver & interval. Now whenever Selenium detects this particular type of argument Selenium treats this as FluentWait. Now when you actually implement a FluentWait you have to import those two libraries "com.google.common.base.Function" which will address the error you are facing. Of course you have to import "FluentWait" as well.
Let me know if this helps you.

By modifying the code in the "Login.Java" class.. The issue was related to driver being null as I did not extend "Base" in the "Login" class.

Getting java.lang.NullPointerException for selenium webdriver class

I am quite new to Selenium WebDriver. A java.lang.NullPointerException has been troubling me for sometime now, and I cannot understand why. Following are my classes which are quite simple actually:
suiteBase.java
package utilities.suiteBase;
import org.openqa.selenium.WebDriver;
import actions.testPage1.testPage1Actions;
import ui_map.testPage1.TestPage1UI;
public class suiteBase {
public WebDriver driver;
protected static TestPage1UI tpui = new TestPage1UI();
protected static testPage1Actions tpa = new testPage1Actions();
}
testPage1Actions.java
package actions.testPage1;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriver.Timeouts;
import org.openqa.selenium.WebElement;
import utilities.suiteBase.suiteBase;
public class testPage1Actions extends suiteBase {
public WebDriver driver;
public void test(WebDriver driver){
WebElement loc1 = driver.findElement(By.xpath("id('email')"));
loc1.sendKeys("testing");
System.out.println("done...");
}
}
TestPage1.java
package testPage1;
import org.openqa.selenium.WebDriver;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
import utilities.suiteBase.BrowserOpen;
import utilities.suiteBase.suiteBase;
public class TestPage1 extends suiteBase{
public WebDriver driver;
BrowserOpen browse = new BrowserOpen();
#Parameters({ "browserType", "appURL" })
#Test(priority = 1)
public void openBrowser(String browserType, String appURL){
browse.setUp(browserType, appURL);
System.out.println("Done....");
}
#Test(priority = 2)
public void testCase1() throws InterruptedException{
driver.wait(1000);
tpa.test(driver);
}
}
I run the TestPage1.java file using XML, where I encounter following error:
java.lang.NullPointerException at
testPage1.TestPage1.testCase1(TestPage1.java:28) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497) at
org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714) at
org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901) at
org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231) at
org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at
org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767) at
org.testng.TestRunner.run(TestRunner.java:617) at
org.testng.SuiteRunner.runTest(SuiteRunner.java:334) at
org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329) at
org.testng.SuiteRunner.privateRun(SuiteRunner.java:291) at
org.testng.SuiteRunner.run(SuiteRunner.java:240) at
org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) at
org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) at
org.testng.TestNG.runSuitesSequentially(TestNG.java:1198) at
org.testng.TestNG.runSuitesLocally(TestNG.java:1123) at
org.testng.TestNG.run(TestNG.java:1031) at
org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:137)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:58)
Also I have browserOpen class which I run before TestPage1, in which I declare the WebDriver
package utilities.suiteBase;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
import utilities.suiteBase.BrowserOpen;
public class BrowserOpen {
public WebDriver driver;
static String driverPath = "E:\\Selenium\\";
public void setUp(String browserType, String appURL) {
try {
setDriver(browserType, appURL);
} catch (Exception e) {
System.out.println("Error....." + e.getStackTrace());
}
}
#AfterClass
public void tearDown() {
driver.quit();
}
private void setDriver(String browserType, String appURL) {
switch (browserType) {
case "chrome":
driver = initChromeDriver(appURL);
break;
case "firefox":
driver = initFirefoxDriver(appURL);
break;
default:
System.out.println("browser : " + browserType
+ " is invalid, Launching Firefox as browser of choice..");
driver = initFirefoxDriver(appURL);
}
}
private static WebDriver initChromeDriver(String appURL) {
System.out.println("Launching google chrome with new profile..");
System.setProperty("webdriver.chrome.driver", driverPath + "chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.manage().window().maximize();
driver.navigate().to(appURL);
System.out.println("URL inserted");
// driver.get(appURL);
return driver;
}
private static WebDriver initFirefoxDriver(String appURL) {
System.out.println("Launching Firefox browser..");
WebDriver driver = new FirefoxDriver();
driver.manage().window().maximize();
driver.navigate().to(appURL);
return driver;
}
}

I never used this technology before, but I see not inited elements.
public WebDriver driver;
WebDriver was not initialized.
You need to initialize them before using.
Like:
WebDriver driver = new FirefoxDriver();
Or something else. Check this out: http://www.seleniumhq.org/docs/03_webdriver.jsp
-- UPD: Exception is probably throwing at testCase1() tpa.test(WebDriver). tpa is probably null.

you are using #Parameters({ "browserType", "appURL" }) in your TestPage1 class that will come from testng.xml file . Hope your using this xml file to run your test.

When I declared - public static WebDriver driver; before #BeforeSuite
and then inside the method if we again declared as
WebDriver driver = new FirefoxDriver();
and run the script then it shows me java.lang.NullPointerException error.
Please try below code to resolve :-
driver = new Firefoxdriver();
Example -
public class LearnCheckBox {
public static WebDriver driver;
#BeforeSuite
public static void verify_SetupBrowser() throws InterruptedException
{
driver = new FirefoxDriver(); //
driver.get("https://learn.letskodeit.com/p/practice");
driver.manage().window().maximize();
Thread.sleep(2000);
}
Ashish Bind

Getting error while calling static WebDriver method to invoke browser using TestNG [duplicate]

This question already has answers here:
How to troubleshoot NullPointerException?
(3 answers)
Closed 6 years ago.
Here is the ERROR MSG :
[TestNG] Running:
C:\Users\AppData\Local\Temp\testng-eclipse-281860475\testng-customsuite.xml
FAILED: LoginTest
java.lang.NullPointerException
at Pro1.Driver.callBrowser(Driver.java:18)
at OR.Login.LoginTest(Login.java:21)
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:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:816)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1124)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:774)
at org.testng.TestRunner.run(TestRunner.java:624)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)
at org.testng.SuiteRunner.run(SuiteRunner.java:261)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1215)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.run(TestNG.java:1048)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:137)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:58)
Here is WebDriver Method :
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.testng.annotations.Test;
public class Driver {
static WebDriver driver;
#Test
public static WebDriver callBrowser() throws Exception{
String browserName = XMLData.getXMLtagValue("Browser");
switch (browserName){
case "Chrome" :
System.setProperty("webdriver.chrome.driver", "C:\\MYFW\\chromedriver.exe");
driver = new ChromeDriver();
break;
case "IE" :
System.setProperty("webdriver.ie.driver", "C:\\MYFW\\IEDriverServer.exe");
driver = new InternetExplorerDriver();
break;
case "Mozilla":
driver = new FirefoxDriver();
break;
default :
System.out.println("As code for given browser is not defined, hence, using Mozilla as default option");
driver = new FirefoxDriver();
}
return driver;
}
}
Here is Calling Program :
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.support.PageFactory;
import org.testng.annotations.Test;
import PageFactory.*;
public class Login {
#Test
public void LoginTest() throws Exception{
String url = XMLData.getXMLtagValue("URL");
String uid = XMLData.getXMLtagValue("Uid");
String pwd = XMLData.getXMLtagValue("Pwd");
WebDriver driver = Driver.callBrowser();
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
driver.get(url);
LoginPage loginPage = PageFactory.initElements(driver, LoginPage.class);
loginPage.username.sendKeys(uid);
loginPage.pwd.sendKeys(pwd);
loginPage.lbtn.click();
}
}
Any ideas why is it throwing this error/NPE ?
It should have called that Driver class without any issue.

Use a correct switch case with either byte, char or int datatype.
Character browserName = <get a character from your input xml>
switch (browserName){
case 'C' :
System.setProperty("webdriver.chrome.driver", "C:\\MYFW\\chromedriver.exe");
driver = new ChromeDriver();
break;
case 'I' :
System.setProperty("webdriver.ie.driver", "C:\\MYFW\\IEDriverServer.exe");
driver = new InternetExplorerDriver();
break;
default :
System.out.println("As code for given browser is not defined, hence, using Mozilla as default option");
driver = new FirefoxDriver();
}
return driver;
While trying to make a call to the method use create an object prior as -
WebDriver driver = new Driver().callBrowser();