Need help with converting a String Property to Integer while Sending a soap request

Here's the Groovy code:

import java.io.*
import jxl.*

def f=new File("C:\\Users\\Ahaan\\Desktop\\SOAPXLS\\Calculator.xls")
def wb=Workbook.getWorkbook(f)
def ws=wb.getSheet("DataSheet")
def rowcount=ws.getRows() 
log.info rowcount
for(def count=1;count<rowcount;count++)
{
Cell execute=ws.getCell(2,count)
if(execute.getContents().equalsIgnoreCase("Y"))
{
Cell data1=ws.getCell(3,count)
testRunner.testCase.testSuite.setPropertyValue("testData1",data1.getContents())
Cell data2=ws.getCell(4,count)
testRunner.testCase.testSuite.setPropertyValue("testData2",data2.getContents())
Cell TestStep=ws.getCell(1,count)
testRunner.runTestStepByName(TestStep.getContents())

}

}

 Thanks.