I have developed "Employee Management System" java project .For improving the ui appearance i have integrated "web look and feel" into my application.Theme is applied correctly.

But here the problem arises:

At first i have runned the java application without connecting to oracle data base,application have runned and worked perfectly.

But when i connected the application to oracle database and runned again the application is taking more time to open and getting strucked.

Code:

For applying theme

 try {

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

Code for Connecting DataBase:

             if (con == null) {
            File sd = new File("");

            File in = new File(sd.getAbsolutePath() + File.separator + "conf.properties");
            File dir = new File(sd.getAbsolutePath() + File.separator + "conf.properties");
            if (!dir.exists()) {
              // dir.mkdir();
                dir.createNewFile();
                Properties pro = new Properties();
            pro.load(new FileInputStream(in));
            pro.setProperty("driverclass", "oracle.jdbc.driver.OracleDriver");
            pro.setProperty("url", "jdbc:oracle:thin:@192.168.1.1:1521:main");
            pro.setProperty("username", "gb16");
            pro.setProperty("passwd", "gb16");                


            try
            {
            FileOutputStream out = new FileOutputStream(in);
            pro.store(out, "Human Management System initialization properties");
            out.flush();
            out.close();}
            catch(Exception e)
            {
                e.printStackTrace();               
            }                                       
            }
            else 
            {
               // System.out.println("Already exists  ");
            }
            Properties pro = new Properties();
            pro.load(new FileInputStream(in));

            Class.forName(pro.getProperty("driverclass"));
            con = DriverManager.getConnection(pro.getProperty("url"), pro.getProperty("username"), pro.getProperty("passwd"));
            st = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
            st = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);


        } else {
            return con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
        }

without the theme the application with connected to database working correctly.

Please help me in solving this issue.

Thanks in advance..