Properties prop=new Properties();        
        try {
            FileInputStream fs=new FileInputStream("config.properties");
            prop.load(fs);
            System.out.println(prop.getProperty("cls1"));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }