query: java.lang.NullPointerException while Login with Servlet&JSP
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 66284
negative_passages.text: NullPointerException when Creating an Array of objects
negative_passages.docid: 72332
negative_passages.text: How to Properly Handle Exceptions in a JSP/Servlet App?
negative_passages.docid: 1807
negative_passages.text: How to transfer data from JSP to servlet when submitting HTML form
negative_passages.docid: 18116
negative_passages.text: java.lang.IllegalArgumentException: The servlets named [X] and [Y] are both mapped to the url-pattern [/url] which is not permitted
negative_passages.docid: 110817
negative_passages.text: javax.servlet.ServletException: bean [name] not found within scope
negative_passages.docid: 124496
negative_passages.text: Database.SaveResult.getId() returns null
negative_passages.docid: 1961
negative_passages.text: Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
negative_passages.docid: 2679
negative_passages.text: How to retrieve and display images from a database in a JSP page?
negative_passages.docid: 64200
negative_passages.text: Can Java's NullPointerException be changed to report on which variable was null?
negative_passages.docid: 64351
negative_passages.text: Unit testing a Java Servlet
negative_passages.docid: 31422
negative_passages.text: javax.servlet.ServletException: javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in
negative_passages.docid: 81703
negative_passages.text: The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory
negative_passages.docid: 289
negative_passages.text: What is a NullReferenceException, and how do I fix it?
negative_passages.docid: 96453
negative_passages.text: Caught Throwable or Exception is null
negative_passages.docid: 12759
negative_passages.text: Unable to aquire valid session id using an apex class
negative_passages.docid: 43446
negative_passages.text: JSONException: Value of type java.lang.String cannot be converted to JSONObject