Factory design pattern

 public class CSVFactory {

    public static void main(String arg[]) {
        //  GenerateCSVFile filetype= CSVFactoryClass
        CSVFactoryClass factorydata = new CSVFactoryClass();
        factorydata.callCSVfactory("detail").generateCSVFile();
        CompanyWideReportCSV abc=   new CompanyWideReportCSV();
        abc= (CompanyWideReportCSV) factorydata.callCSVfactory("company");
        abc.generateCSVFile();
    }
}
    interface  GenerateCSVFile {
        public String generateCSVFile();
    }

    class DetailReportCSV implements  GenerateCSVFile{
        public String generateCSVFile(){
            System.out.println("pawan kumar------");
            return "pawan";
        }

        public String generateCSVFilea(){
            System.out.println("pawan kumar1111111111----------");
            return "pawan";
        }

    }

    class CompanyWideReportCSV implements  GenerateCSVFile{
        public String generateCSVFile(){
            System.out.println("----------kumar----------");
            return "kumar";
        }
    }

    class CSVFactoryClass {
        public  GenerateCSVFile callCSVfactory(String csvType) {
            if(csvType.equalsIgnoreCase("detail")){
                return new DetailReportCSV();
            }else if(csvType.equalsIgnoreCase("company")){
                return new CompanyWideReportCSV();
            } else {
                return new DetailReportCSV();
            }
        }
    }