java application error: java.lang.NullPointerException

[chokcheese]

I'm having trouble with a java application. When I try and run the program it shows a java.lang.NullP ointerException in the "tic.getClient( ).getClientTick etList().add(ti c);" line (it's in bold). I know it has something to do with an object being null, but I just can't figure out which... Can anyone help? Any suggestions are greatly appreciated :) (By the way, I translated the code to english but I might have forgotten to translate a word, so if there's something that doesn't make sense please tell me so I can fix it. Oh and I didn't include the Ticket class code because it's a lot, but if it's necessary I'll post it)

rentACar Class(only the method that's not working)

public void makeTicket(){
       String clientNum=JOptionPane.showInputDialog("Client's number");
       if (foundClient(clientNum)){
           findState();
           if (availableCars.size()!=0){
               Transportation vehic=(Transportation)JOptionPane.showInputDialog(null,"Choose vehicle","Vehicles",JOptionPane.PLAIN_MESSAGE,null,availableCars.toArray(), 0);
               int days=0;
               do{
                   try {
                       days=Integer.parseInt(JOptionPane.showInputDialog("Number of days"));
                       if (days<1){
                           JOptionPane.showMessageDialog(null,"ERROR");
                       }
                   }
                   catch(NumberFormatException nFE){
                       JOptionPane.showMessageDialog(null,"ERROR");
                   }
               }
               while (days<1);
               Ticket tic=new Ticket();
               tic.setDays(days);
               tic.setDateTaken(Calendar.getInstance());
               tic.getFinalDate().add(Calendar.DATE, days);
               tic.setState("Not Cancelled");
               tic.setVehicle(vehic);
               tic.setNum(ticketList.size()-1);
               
               if (vehic instanceof notBike){
                   if (((notBike)tic.getVehicle()).getType().equals("Car")){
                       tic.setAmount(days*125);
                   }else{
                       if (((notBike)tic.getVehicle()).getType().equals("Bus")){
                           tic.setAmount(days*200);
                       }else{
                           if (((notBike)tic.getVehicle()).getType().equals("Motorcycle")){
                               tic.setAmount(days*80);
                           }else{
                               tic.setAmount(days*60);
                           }
                       
                       }
           
                   }
           
               }else{
                   tic.setAmount(days*30);
               }
                   
               for (int i=0; i<clientList.size();i++){
                   if (((Client)clientList.get(i)).getClientNum().equalsIgnoreCase(clientNum)){
                       tic.setClient((Client)clientList.get(i));

                      [B] tic.getClient().getClientTicketList().add(tic);[/B]

                       ticketList.add(tic);
                       i=clientList.size();
                   }
               }
               
           }else{
               JOptionPane.showMessageDialog(null,"There are no vehicles available");
           }
       }else{
           JOptionPane.showMessageDialog(null,"The client does not exist");
       }
       
   }

Client Class

package project;

import java.util.ArrayList;

public abstract class Client {
    protected String clientNum;
    protected String name;
    protected String tel;
    protected String address;
    protected ArrayList clientTicketList=new ArrayList();

    public Client() {
    }

    public Client(String clientNum, String name, String tel, String address, ArrayList clientTicketList) {
        this.clientNum = clientNum;
        this.name = name;
        this.tel = tel;
        this.address = address;
        this.clientTicketList = clientTicketList;
    }

    public String getClientNum() {
        return clientNum;
    }

    public void setClientNum(String clientNum) {
        this.clientNum = clientNum;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTel() {
        return tel;
    }

    public void setTel(String tel) {
        this.tel = tel;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
    
    public ArrayList getClientTicketList() {
        return clientTicketList;
    }

    public void setClientTicketList(ArrayList clientTicketList) {
        this.clientTicketList = clientTicketList;
    }
    
    public String displayInfo(){
        return "Name: "+name+"\nClient Number: "+clientNum+"\nPhone Number: "+tel;
    }
    
    public String toString(){
        return Name: "+name+"\nClient Number: "+clientNum+"\nPhone Number: "+tel+"\nAddress: "+address;
    }
}

[sukatoa]

Can you post the Ticket class?

Maybe you are adding a null value.

Update us...
sukatoa

[chokcheese]

Nevermind I found the problem! thanks! :)