CODEWITHSUNDEEP
javajspjavabeans
Colin Douglas
Colin Douglas

Reputation: 583

doPost and getParameter()

First timer here on StackOverflow. I have a question concerning req.getParamter. I have a class Alumni(). Within this Alumni class I have a PersonalAddress class that is used to store things like the city, state, street, etc. As im pulling data out of my JSP page I'm running into an error when I try to pull data into the structs. An example may explain better.

public Alumni() {
  String name;
  int age;
  PersonalAddress personaladdress;

  public Alumni(){}
  ... (constuctors,getters and setters within each class, yadda yadda)
}

In my doPost, variables like name are being pulled fine from the html page. Example: 

Alumni a = new Alumni();

 a.setName(req.getParameter("name"));

 But once I get to the "structs" it will not let me do so. Example

 a.personaladdress.setStreet(req.getParameter("street"));

Any ideas why I'm not allowed to use getParameter("street") in my personaladdress struct?

Upvotes: 1

Views: 159

Answers (1)

earcam
earcam

Reputation: 6682

I'll try and answer with some questions =)

  • What is the exact error message you get?
  • Do you have a getter for PersonalAddress of the for getPersonaladdress() in the Alumni class? Is the case exactly correct - uppercase 'A' in getPersonalAddress() not getPersonaladdress()?

If it's neither of the above and you're seeing a NullPointerException then it's probably because you've not created the PersonalAddress in the new Alumni before trying to set the street (which you can do without the getter syntax).

Alumni a = new Alumni();
a.setPersonalAddress(new PersonalAddress();
a.personalAddress.street(req.getParameter("street"));

Upvotes: 1

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