org.testng.TestNGException: Cannot instantiate class issue

[sreedeviv...@gmail.com]

my program contains 4 class :

import is added but not included below

class1 

package testngsa;

public class NewTest { 

                              String UserName;

public String getUserName(){

return UserName;

}

public void  setUserName( String UserName){

this.UserName=UserName;

}

}

class2:

public class NewTest1 {

public NewTest1() throws Exception {

super();

}

int rows_total;

NewTest dataSheet =null;

List<NewTest> dataSheetList=  new ArrayList<NewTest>();

Row row = null;

XSSFCell cell = null;

public List<NewTest> readDataFromExcel(String filePath, String sheetName)throws Exception{

FileInputStream inputStream= new FileInputStream(filePath);

XSSFWorkbook workbook = new XSSFWorkbook(inputStream); 

XSSFSheet sheet = workbook.getSheet(sheetName);

rows_total= sheet.getLastRowNum();

for(int i=1;i<3;i++){

row = sheet.getRow(i);

dataSheet= new NewTest();

cell=(XSSFCell) row.getCell(1);

dataSheet.setUserName(cell.getStringCellValue());

//cell=(XSSFCell) row.getCell(1);

//dataSheet.setPassword(cell.getStringCellValue());

dataSheetList.add(dataSheet);

}

return dataSheetList;

}

}

class3:

public class NewTest2   extends NewTest1 {

WebDriver driver;

//Actions action = new Actions(driver);

public String baseUrl = " ";

public NewTest2 ()  throws Exception {

super();

}

protected List<NewTest> dataSheetList = readDataFromExcel("C:/Users/name/Desktop/data2.xlsx","data");//name gave my own name

@BeforeTest

//@Test

//@Before

// @BeforeMethod

public void launchbr() {

System.setProperty("webdriver.chrome.driver", "D:\\chrome/chromedriver.exe");

ChromeOptions options = new ChromeOptions();

options.addArguments("--disable-extensions");

       WebDriver driver = new ChromeDriver(options);

        driver.get(baseUrl);

   driver.manage().timeouts().implicitlyWait(300, TimeUnit.SECONDS);

 }

}

class4:

public class NewTest3   extends NewTest2 {

protected String GeUserName;

protected String GetPassword;

public NewTest3 () throws Exception{

super();

}

@Test

public void login() throws InterruptedException{

if (dataSheetList.size()==0){

System.out.println(" no data found");

}else{

for(NewTest gData: dataSheetList){

GeUserName = gData.getUserName();

//GetPassword = gData.getPassword();

driver.findElement(By.xpath(" ")).click();

driver.findElement(By.xpath("  ")).sendKeys(GeUserName);

driver.findElement(By.xpath(" ")).click();

driver.quit();

}

}

}

}

tried with driver.quit and driver.close ,@before ,@beforetest,@beforemethod,@test

to verify  testng installed correctly, checked for sample testng code and that was passed successfully.

and my error is :

org.testng.TestNGException: 

Cannot instantiate class testngsa.NewTest3

at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:31)

at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:410)

at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:323)

at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:126)

at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:191)

at org.testng.TestClass.getInstances(TestClass.java:99)

at org.testng.TestClass.initTestClassesAndInstances(TestClass.java:85)

at org.testng.TestClass.init(TestClass.java:77)

at org.testng.TestClass.<init>(TestClass.java:42)

at org.testng.TestRunner.initMethods(TestRunner.java:423)

at org.testng.TestRunner.init(TestRunner.java:250)

at org.testng.TestRunner.init(TestRunner.java:220)

at org.testng.TestRunner.<init>(TestRunner.java:169)

at org.testng.remote.support.RemoteTestNG6_10$1.newTestRunner(RemoteTestNG6_10.java:28)

at org.testng.remote.support.RemoteTestNG6_10$DelegatingTestRunnerFactory.newTestRunner(RemoteTestNG6_10.java:61)

at org.testng.SuiteRunner$ProxyTestRunnerFactory.newTestRunner(SuiteRunner.java:616)

at org.testng.SuiteRunner.init(SuiteRunner.java:185)

at org.testng.SuiteRunner.<init>(SuiteRunner.java:131)

at org.testng.TestNG.createSuiteRunner(TestNG.java:1383)

at org.testng.TestNG.createSuiteRunners(TestNG.java:1363)

at org.testng.TestNG.runSuitesLocally(TestNG.java:1217)

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)

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:23)

... 25 more

Caused by: java.lang.NullPointerException

at testngsa.NewTest1.readDataFromExcel(NewTest1.java:50)

at testngsa.NewTest2.<init>(NewTest2.java:46)

at testngsa.NewTest3.<init>(NewTest3.java:35)

... 30 more

Please help

  

 

[⇜Krishnan Mahadevan⇝]

Looking at the stack trace, I would suggest that you setup a break point in NewTest1.java at line 50 and see what is causing the NullPointerException. Once you fix that you should be good.

Caused by: java.lang.NullPointerException at testngsa.NewTest1.readDataFromExcel(NewTest1.java:50)
at testngsa.NewTest2.<init>(NewTest2.java:46)
at testngsa.NewTest3.<init>(NewTest3.java:35)

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Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribbings @ http://rationaleemotions.wordpress.com/

[Vimal Raj]

Hi,

I see you are getting a NullPointerException which could cause the problem. Refer the following stacktrace (trimmed version of your entire stacktrace)

Caused by: java.lang.NullPointerException

at testngsa.NewTest1.readDataFromExcel(NewTest1.java:50)

at testngsa.NewTest2.<init>(NewTest2.java:46)

at testngsa.NewTest3.<init>(NewTest3.java:35)

... 30 more

I would recommend you to put a break point and debug. Also, it is recommended to initialize the objects in your @Before hooks.

Thanks

Vimalraj

http://vimalselvam.com

https://www.gitshowcase.com/email2vimalraj

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