| Attributes | Parameters | |
| Types | 1. Application/context 2. Request 3. Session |
1. Application/context init parameters 2. Request parameters 3. Servlet init parameters |
| Method to set | setAttribute(String name, Object value) | You CANNOT set Application and Servlet init parameters—they’re set in the DD, |
| Return type | Object | String |
| Method to get | getAttribute(String name) return type of the method is Object |
getInitParameter(String name) return type of the method is String |
source : Head First Servlets and JSP