boolean function ( ) { return host != null && username != null && password != null ; }
checks if our host , user name and password are set concode_field_sep String password concode_elem_sep String host concode_elem_sep String username concode_field_sep void setHost concode_elem_sep void setPassword concode_elem_sep String getPassword concode_elem_sep void setUsername concode_elem_sep String getHost concode_elem_sep String getUsername