[ERROR] Errors in 'file:/D:/Projects/Workspace/PC%20Maintenance/PCMaintenanceLog/src/com/gwtproject/pcmaintenancelog/client/PCMaintenanceLog.java'
        [ERROR] com.gwtproject.pcmaintenancelog.client.gui.HomePage cannot be resolved to a type
     [ERROR] Errors in 'file:/D:/Projects/Workspace/PC%20Maintenance/PCMaintenanceLog/src/com/gwtproject/pcmaintenancelog/client/gui/HomePage.java'
        [ERROR] com.gwtproject.pcmaintenancelog.client.service.CustomServiceCientImplementation cannot be resolved to a type
     [ERROR] Errors in 'file:/D:/Projects/Workspace/PC%20Maintenance/PCMaintenanceLog/src/com/gwtproject/pcmaintenancelog/client/service/CustomServiceCientImplementation.java'
        [ERROR] com.gwtproject.pcmaintenancelog.client.gui.MaintenanceLogUI cannot be resolved to a type
     [ERROR] Errors in 'file:/D:/Projects/Workspace/PC%20Maintenance/PCMaintenanceLog/src/com/gwtproject/pcmaintenancelog/client/gui/MaintenanceLogUI.java'
        [ERROR] Line 76: Cannot refer to the non-final local variable serviceImp defined in an enclosing scope
     [ERROR] Errors in 'file:/D:/Projects/Workspace/PC%20Maintenance/PCMaintenanceLog/src/com/gwtproject/pcmaintenancelog/client/gui/GreetingPageUI.java'
        [ERROR] com.gwtproject.pcmaintenancelog.client.service.CustomServiceCientImplementation cannot be resolved to a type

public class ExportMaintenanceLogReport {
ExportMaintenanceLogReport(){

    final DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH.mm.ss");
    Date date = new Date();
    ResultSet rs=null;
    try {
        Class.forName("oracle.jdbc.driver.OracleDriver");
        Connection con=DriverManager.getConnection(
                "jdbc:oracle:thin:@localhost:1521:xe","system","root");
        Statement stmt=con.createStatement();
         rs=stmt.executeQuery(" Select * from PC_MAINTENANCE_LOG ");
    } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    XSSFWorkbook workbook = new XSSFWorkbook();
         XSSFSheet sheet = workbook.createSheet("Log Data");
         Map<String, Object[]> data = new TreeMap<String, Object[]>();
          data.put("1", new Object[] {"S.No.","ASSIGNED_TO", "LOGID", "DEPARTMENT_NAME","PHONE","ITEM","PROBLEM"
                    ,"ACTION","RECEIVED_DATE","DISPATCHED_DATE"});
            try {
                int i=2,j=1;
                while(rs.next()){
                    String key= Integer.toString(i++);
                data.put(key,new Object[] {j++,rs.getString("ASSIGNED_TO")
                            , rs.getString("LOGID"), rs.getString("DEPARTMENT_NAME"),rs.getString("PHONE")
                            ,rs.getString("ITEM"),rs.getString("PROBLEM"),rs.getString("ACTION"),
                            rs.getString("RECEIVED_DATE"),rs.getString("DISPATCHED_DATE")});
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            Set<String> keyset = data.keySet();
            int rownum = 0;
            for (String key : keyset)
            {
                Row row = sheet.createRow(rownum++);
                Object [] objArr = data.get(key);
                int cellnum = 0;
                for (Object obj : objArr)
                {
                   Cell cell = row.createCell(cellnum++);
                   if(obj instanceof String)
                        cell.setCellValue((String)obj);
                    else if(obj instanceof Integer)
                        cell.setCellValue((Integer)obj);
                }
            }
            try
            {
                String filename= "LogData_"+sdf.format(date)+".xlsx";
                //Write the workbook in file system
                FileOutputStream out = new FileOutputStream(new File(filename));
                workbook.write(out);
                out.close();

    }catch (Exception ex) {
        ex.printStackTrace();

    }

}
}