SEVERE: java.lang.NullPointerException

When i try to run my index.jsp page which calls WebClient.jsp page, where i define my InitialContext() method, a开发者_如何转开发nd implement my Bean in class AccountBean.java shows ..

SEVERE: java.lang.NullPointerException........

I use Glassfish v3, jdk1.6, eclipse Helios.

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I can't give too specific an answer, but my recommendation for this issue is to make sure that every object you are trying to use is guaranteed to be pointing to an instance of the object.