TestNG - Passing Multiple parameters in DataProviders

I am learning TestNG. This blogpost is for passing multiple parameters for Test method using data providers. To get started with TestNG please refer link.

Below is code snippet I tried. This is working code.

Dataproviders in TestNG test

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import org.testng.Assert;
import org.testng.annotations.*;
import static org.testng.Assert.*;
import java.util.*;
public class test {
@DataProvider(name = "Pass Single Parameter")
public Object[][] createData() {

    Object[][] retkeyword={{"One"},
                        {"Two"},
                        {"Three"}};
    return(retkeyword);
}

@DataProvider(name = "Passing Two parameters")
public Object[][] createDataforTest2() {
 List<String> ls=new ArrayList<String>();
 ls.add("one expected");
    ls.add("Three expected");
    ls.add("two expected");
    ls.add("four expected");
    Object[][] retkeyword={{"One", ls},
                        {"Two", ls},
                        {"Three", ls}};
    return(retkeyword);
}

@DataProvider(name = "Passing Three parameters")
public Object[][] createDataforTest3() {
    HashMap hm = new HashMap();
    hm.put("One", "One Test");
    hm.put("Two", "Two Test");
    hm.put("Three", "Three Test");

 List<String> ls=new ArrayList<String>();
 ls.add("one expected");
    ls.add("Three expected");
    ls.add("two expected");
    ls.add("four expected");
    Object[][] retkeyword={{"One", ls, hm},
                        {"Two", ls, hm},
                        {"Three", ls, hm}};
    return(retkeyword);
}

@Test(dataProvider = "Passing Three parameters")
public void verifyData3(String keyword, ArrayList<String> ls, HashMap hm)
{
   System.out.println("Passing 3 parameters to Test");
   System.out.println("Start Test");
   System.out.println("Value :"+keyword);
      Iterator it=ls.iterator();
      while(it.hasNext())
      {
        String value=(String)it.next();
        System.out.println("Value :"+value +" Hash Map is "+ hm.get(keyword));
      }
      System.out.println("End Test");
}

@Test(dataProvider = "Pass Single Parameter")
public void verifyData1(String keyword)
{
   System.out.println("Passing Single parameter to Test");
   System.out.println("Start Test");
      System.out.println("Value :"+keyword);
      System.out.println("End Test");
}

@Test(dataProvider = "Passing Two parameters")
public void verifyData2(String keyword, ArrayList<String> ls )
{
   System.out.println("Passing Two parameter to Test");
   System.out.println("Start Test");
      System.out.println("Value :"+keyword);
      Iterator it=ls.iterator();
      while(it.hasNext())
      {
        String value=(String)it.next();
        System.out.println("Value :"+value);
      }
      System.out.println("End Test");
}
}

Hope it helps!!