HSSF Read Binary (.xls) Workbook

Package packagename;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.io.File;
import java.io.FileInputStream;
import java.util.concurrent.TimeUnit;

public class className {
	private static WebDriver driver;
	private static String baseUrl;

	@BeforeTest
	public void setUp() {
		driver = new ChromeDriver();
		baseUrl = "https://www.google.com";
		driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
	}

	@Test(dataProvider = "DP")
	public static int findcount(String keyword1, String keyword2)
	throws InterruptedException {
		int res = 0;

		driver.get(baseUrl + "/");
		driver.findElement(By.name("q")).sendKeys(keyword1);
		driver.findElement(By.name("q")).sendKeys(Keys.ENTER);
		Thread.sleep(2000);
		driver.findElement(By.name("q")).clear();
		driver.findElement(By.name("q")).sendKeys(keyword2);
		driver.findElement(By.name("q")).sendKeys(Keys.ENTER);
		Thread.sleep(2000);
		driver.findElement(By.name("q")).clear();

		return res;
	}

	@DataProvider(name = "DP")
	public static String[][] excelRead() throws Exception {
		File excel = new File("/Users/.../data.xls");
		FileInputStream fis = new FileInputStream(excel);

		HSSFWorkbook wb = new HSSFWorkbook(fis);
		HSSFSheet ws = wb.getSheet("Sheet1");

		int rowNum = ws.getLastRowNum() + 1;
		int colNum = ws.getRow(0).getLastCellNum();
		String[][] data = new String[(rowNum - 1)][colNum];

		int k = 0;
		for (int i = 1; i < rowNum; i++) {
			HSSFRow row = ws.getRow(i);
			for (int j = 0; j < colNum; j++) {
				HSSFCell cell = row.getCell(j);
				String value = cellToString(cell);
				data[k][j] = value;
				System.out.println("the value is: " + value);
			}
			k++;
		}

		return data;
	}

	@AfterTest
	public void tearDown() throws Exception {
		driver.quit();
	}

	public static void main(String[] args) throws Exception {
		String[][] data;
		data = excelRead();
		if (data != null) {
			int j = 0;
			String aValue = null;
			for (int i = 1; i < data.length; i++) {
int pageCount = findcount(data[i][1], data[i][2]); //vary depending upon the Excel columns
				if (pageCount > j) {
					j = pageCount;
					aValue = data[i][1];
				}
System.out.println("The count of the data[" + i + "][1] is: " + data[i][1] + " = " + pageCount);
			}
			System.out.println("Greater value: " + aValue + " = " + j);
		} else {
			System.out.println("No records...");
		}
	}

	public static String cellToString(HSSFCell cell) {

		Object result;
		switch (cell.getCellType()) {

			case Cell.CELL_TYPE_NUMERIC:
				result = cell.getNumericCellValue();
				break;

			case Cell.CELL_TYPE_STRING:
				result = cell.getStringCellValue();
				break;

			case Cell.CELL_TYPE_BOOLEAN:
				result = cell.getBooleanCellValue();
				break;

			case Cell.CELL_TYPE_FORMULA:
				result = cell.getCellFormula();
				break;

			default:
				throw new RuntimeException("Unknown Cell Type");
		}

		return result.toString();

	}

}

on 51 line I am getting error...