SumRemote sr;
        try {
            InitialContext ctx = new InitialContext();
            sr = (SumRemote) ctx.lookup("sumation");
            System.out.println(sr.sum(5, 10));
            System.out.println(sr.sum(20, 5));
            sr = (SumRemote) ctx.lookup("sumation");
            System.out.println(sr.sum(5, 10));
            System.out.println(sr.sum(5, 10));
//            calculatorBean = (CalculatorBeanRemote) ctx.lookup("calculator");
//            System.out.println("Result " + calculatorBean.multiply(6, 4));
        } catch (NamingException ex) {
            ex.printStackTrace();
        }