backBean add to list Problem

[Zaeed McColin]

hi guys, I'm new in JSF
I developed a manage bean, (4 JSP use this bean)
It's should like work such as shopping cart

but it's can not work, and return error when I want add a new item to list

and the code

package JSFbeans;

import java.util.Date;
import java.util.List;
import javax.faces.application.Application;
import javax.faces.component.html.HtmlOutputText;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

public class cart {
    private String text;
    private List listCart;
        public cart(){}
        public void setText(String text){this.text=text;}
        public String getText(){return this.text;}
        public List getListCart(){return this.listCart;}
        public void setListCart(List listCart){this.listCart=listCart;}
        public Date getToday(){return new Date();}
        public void addtoList(ActionEvent eve){
                String fd=eve.getComponent().getId();
                this.text=fd;
                Application app=FacesContext.getCurrentInstance().getApplication();
                HtmlOutputText outt=(HtmlOutputText) app.createComponent(HtmlOutputText.COMPONENT_TYPE);
                outt.setValue(fd);
                listCart.add(outt);  //return Error from Glassfish

            }
        }

[Zaeed McColin]

funny bug
I'm really sorry for self :thumbdown:

I have to declare my listCart

...
private List listCart=new ArrayList();
...

[Bauke Scholtz]

Glad you fixed it yourself, but in the future you should not ignore any exceptions you got, but invesitgate them and in case you stucks, share them with us. Post them with the complete stacktrace. Exceptions tell something about the cause of the problem and thus, when you understand them, a solution should be obvious enough. You as developer should really know that better.