module 17 exc5 bigbasket

hello sir ... in this exc. im getting different number product list and add button and so its not clicking on add button... plz help me

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Hashtable;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.Assert;

public class BigBasket_Exc5{
static List<String> name2;
static List<String> name3=new ArrayList<String>();;

public static void main(String[] args) throws InterruptedException {


Xls_Reader datatable=new Xls_Reader("C:\\sunita_java\\Bigbasket.xlsx");
int r=datatable.getRowCount("Sheet1");
System.out.println("Total rows :"+r);


System.setProperty("webdriver.chrome.driver","C:\\sunita_java\\driverExe\\chromedriver.exe");
WebDriver driver=new ChromeDriver();
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS);


List<String> productToBeAdded=new ArrayList<String>();
Hashtable<String,String> QuantityToBeAdded=new Hashtable<String ,String>();
name2=new ArrayList<String>();

productToBeAdded=new ArrayList<String>();

for(int i=2;i<=r;i++){
String productName= datatable.getCellData("Sheet1", "ProductName", i);
String quantity= datatable.getCellData("Sheet1", "Quantity", i);
System.out.println(" product :"+productName +" Quantity: "+quantity);
productToBeAdded.add(productName);
QuantityToBeAdded.put(productName,quantity );
}
driver.get("http://www.bigbasket.com/cl/fruits-vegetables/?nc=nb");
driver.findElement(By.xpath("//*[@id='skip_explore']")).click();



List<WebElement> productlist = driver.findElements(By.xpath("//div[@class='uiv2-list-box-img-title']/span/a"));
System.out.println("product list:"+productlist.size());
List<WebElement> button = driver.findElements(By.xpath("//div[@class='uiv2-list-box-drop-rate-block']/div[2]/div/a"));
System.out.println("Add list:"+button.size());

int productcount=0;
for(int i =0;i<productlist.size();i++)
{
//prints name of all products on first page
// System.out.println(driver.findElements(By.xpath("//div[@class='uiv2-list-box-img-title']/span/a")).get(i).getText());
name2.add(driver.findElements(By.xpath("//div[@class='uiv2-list-box-img-title']/span/a")).get(i).getText());

if( productToBeAdded.contains(productlist.get(i).getText()))
{
System.out.println(" found product: "+ productlist.get(i).getText());

button.get(i).click();

// validate basket count
String count=driver.findElement(By.xpath("//span[@class='uiv2-num-basket-items']")).getText();
System.out.println("product count :"+ count);
Assert.assertEquals(count,String.valueOf(productcount+1));
productlist=driver.findElements(By.xpath("//div[@class='uiv2-list-box-img-title']/span/a")) ;

button =driver.findElements(By.xpath("//div[@class='uiv2-list-box-drop-rate-block']/div[2]/div/a")) ;
productcount++;


}

}

/* name2.removeAll(Arrays.asList("", null));
System.out.println(name2);

for(int j=0;j<name2.size();j++){
//System.out.println("****"+name2.get(j));
name3.add(name2.get(j).split("\n")[1]);
}
System.out.println("***"+name3);*/


}
}

l