oracle connectivity

con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","hr","hr");

i have error on above line when i tried following code



Connection con;
        Statement stmt;
        try
        {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            System.out.println("Connection established");
            con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","hr","hr");
            stmt=con.createStatement();
            ResultSet rst=stmt.executeQuery("select * from emptable");
            rst.next();
            String st=rst.getString(1);
            System.out.println(st);
            stmt.close();
            con.close();
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }