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super.init(config) when overrding the servlet init() method

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ashoush Posts: 25	Posted 23:16 Oct 10, 2009 \| Hi, When I override the init() method of a servlet, I need to put super.init(config) ; inside the method, otherwise it throws an NPE exception when I use the getServletContext() method. However in the class video I see that this is not happening. Anybody knows what might be different on my server that make this happen? Thanks.
cysun Posts: 2935	Posted 12:34 Oct 11, 2009 \| Eclipse's servlet wizard auto-generates the skeleton for "public void init(ServletConfig config) throws ServletException", which is wrong. You should override "public void init() throws ServletException" instead (i.e. simply remove the argument of the init method generated by Eclipse). See http://java.sun.com/products/servlet/2.5/docs/servlet-2_5-mr2/javax/servlet/GenericServlet.html for the difference between init() and init(config).

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ashoush

Posts: 25

Posted 23:16 Oct 10, 2009 |

Hi,

When I override the init() method of a servlet, I need to put

super.init(config) ;

inside the method, otherwise it throws an NPE exception when I use the getServletContext() method. However in the class video I see that this is not happening. Anybody knows what might be different on my server that make this happen?

Thanks.

cysun

Posts: 2935

Posted 12:34 Oct 11, 2009 |

Eclipse's servlet wizard auto-generates the skeleton for "public void init(ServletConfig config) throws ServletException", which is wrong. You should override "public void init() throws ServletException" instead (i.e. simply remove the argument of the init method generated by Eclipse).

See http://java.sun.com/products/servlet/2.5/docs/servlet-2_5-mr2/javax/servlet/GenericServlet.html for the difference between init() and init(config).