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4hv.org :: Forums :: Computer Science
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java problem

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scrooch
Tue May 20 2008, 11:33AM Print
scrooch Registered Member #908 Joined: Wed Jul 18 2007, 05:53AM
Location:
Posts: 49
i have thefollowing class



public class person

{
public String name;
public String phone;
public String address;
public String email;


public person(String pname,String paddress,String pemail,String pphone) //constructor for the person class
{
name=pname;
phone=pphone;
address=paddress;
email=pemail;
}

}




and the following program



public class AddressBook
{
public static void main(String[] args)
{
ArrayList<person> people = new ArrayList<person>();
people.add(new person(tname,taddress,temail,tphone));

}

public static void addperson(String data)
{
people.add(new person(name,address,email,finalphone));
}

}





when i try to compile this is gives the following error in the line people.add(new person(name,address,email,finalphone)); in the addperson method

Error: cannot find symbol
symbol : variable people
location: class AddressBook


hod do i fix this?
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Dago
Tue May 20 2008, 12:09PM
Dago Registered Member #538 Joined: Sun Feb 18 2007, 08:33PM
Location: Finland
Posts: 181
I think theres something wrong with your variable "people" declaration.

Shouldnt it be more like: people = ArrayList(person);? But I still think you cant give a class named "person" as a collection for the ArrayList function which requires a collection but I'm not sure about this since theres alot of time since I used java.
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Steve Conner
Tue May 20 2008, 12:26PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I think this is a scoping issue. You declared the "people" array in main. It probably isn't visible from within your addperson method.

I think the declaration of the people array is fine as far as its syntax. I guess <person> is a template that specifies that you want your ArrayList to contain "person" objects.
Link2

If I were writing this program, I'd give addperson() an extra argument, that specified the array that you want the person added to. YMMV though: I'm a C++ guy and have never used Java. It's like Sun made a new language out of all the worst parts from C++ and all the worst parts of Visual Basic ill
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