How to fix java.lang.indexoutofboundsexception : invalid array range: 1 to 1

<pre>package Testcases;

import Base.Page;
import Listeners.ExtentReport;
import Pages.Actions.BursaryRegister;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.io.IOException;

public class BursaryTest {

    ExtentReport extentReport = new ExtentReport();

    @DataProvider(name = "ReadData")
    public Object[][] ReadData() throws IOException {
        Utilities.DataProvider.ReadData();
        return Utilities.DataProvider.ReadData();
    }

    @Test(dataProvider = "ReadData")
    public void bursaryTest (String Name, String Surname, String Email, String ID, String CellNumber, String Test_Case_Description, String Expected_Results) {

        /*Defining Test Case Scenario*/
        extentReport.start(Test_Case_Description);

        Page.initConfiguration();

        /*Calling the object to access everything*/

        try {
            BursaryRegister bursaryLogin = new BursaryRegister();
            bursaryLogin.login(Name, Surname,Email,ID,CellNumber);
        } catch (Exception e) {
            extentReport.failure("Failed To Login");
            throw new AssertionError("Failed To Login");
        }

        extentReport.success("Logged in successfully ");
        Page.quitBrowser();
    }
}

package Utilities;

import Base.Constants;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileInputStream;
import java.io.IOException;

public class DataProvider {

    public static XSSFWorkbook workbook;
    public static XSSFSheet worksheet;
    public static DataFormatter formatter = new DataFormatter();
    public String Res;
    WriteExcelData.Write obj1 = new WriteExcelData.Write();
    public int DataSet = -1;
    String ColName = "Pass/Fail";
    int col_num;


    @org.testng.annotations.DataProvider
    public static Object[][] ReadData() throws IOException {
        FileInputStream fileInputStream = new FileInputStream(Constants.excelPath); //Excel sheet file location get mentioned here
        workbook = new XSSFWorkbook(fileInputStream); //get my workbook
        worksheet = workbook.getSheet(Constants.DATA_SHEET);// get my sheet from workbook
        XSSFRow Row = worksheet.getRow(0);     //get my Row which start fro
        // m 0

        int RowNum = worksheet.getPhysicalNumberOfRows();// count my number of Rows
        int ColNum = Row.getLastCellNum(); // get last ColNum

        Object Data[][] = new Object[RowNum-1][ColNum]; // pass my  count data in array,
        System.out.println("Number of rows" +RowNum);
        for (int i = Constants.start; i <=Constants.end; i++) //Loop work for Rows,


            try {

                {
                    XSSFRow row = worksheet.getRow(i+1);//remember to change this back to 1

                    for (int j = 0; j < ColNum-1; j++) //Loop work for colNum
                    {
                        if (row == null)
                            Data[i][j] = "";
                        else {
                            XSSFCell cell = row.getCell(j);
                            if (cell == null)
                                Data[i][j] = ""; //if it get Null value it pass no data
                            else {
                                String value = formatter.formatCellValue(cell);
                                Data[i][j] = value; //This formatter get my all values as string i.e integer, float all type data value
                            }

                        }
                    }
                }


            } catch (Exception e) {
                e.printStackTrace();
            }
        return Data;
    }
}