Test code for the issue exposed in: (Not able to view ComboBox in Excel using JXL API)[http://stackoverflow.com/questions/18780151/not-able-to-view-combobox-in-excel-using-jxl-api]

gistfile1.java

/*
 * Test code for the issue exposed in:
 * http://stackoverflow.com/questions/18780151/not-able-to-view-combobox-in-excel-using-jxl-api
 * -jar jxl.jar 
 * [jxl 2.6.12 2009-10-26](http://jexcelapi.sourceforge.net/)
 * javac 1.7.0_25 
 */
package org.rondakit.jxl.tester;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import jxl.*;
import jxl.read.biff.BiffException;
import jxl.write.*;
import jxl.write.biff.RowsExceededException;

/**
 * @author Franco 
 */
public class JXLTester {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        List<String> xlData = Arrays.asList("rocks", "my", "world");
        List<String> xlHeader = Arrays.asList("Head1", "Head2");
        try {
            WritableWorkbook workbook = Workbook.createWorkbook(new File("c:\\temp\\output.xls")); // this line allocate a file of 0 byte: 
            WritableSheet writableSheet = workbook.createSheet("First Sheet", 0);

            // ArrayList<String> arrList = new ArrayList<String>();
            ArrayList arrList = new ArrayList();
            arrList.add("DropDown1");
            arrList.add("DropDown2");
            arrList.add("DropDown3");         
            WritableCellFeatures cellFeatures =  null;
            Label checkLabel = null;
            for (int x = 0; x < xlData.size(); x++) {
                for (int i = 0; i <= 14; i++) {
                    System.out.println("X:" + x + "I:" + i);
                    if (i > 9) {
                       checkLabel = new Label(i, x + xlHeader.size(), (String) arrList.get(0));
                       cellFeatures = new WritableCellFeatures();
                       cellFeatures.setDataValidationList(arrList);
                       checkLabel.setCellFeatures(cellFeatures);
                       writableSheet.addCell(checkLabel);                           
                    }
                }
            }

            workbook.write();
            workbook.close();

        } catch (IOException ex) {
            Logger.getLogger(JavaApplication4.class.getName()).log(Level.SEVERE, null, ex);
        // } catch (BiffException ex) {
        //    Logger.getLogger(JavaApplication4.class.getName()).log(Level.SEVERE, null, ex);
        } catch (WriteException ex) {
            Logger.getLogger(JavaApplication4.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}