Array List

[turtlish]

Hello!Sorry to bother you again! I'm trying to make an Array list and I want the user to have the ability to modify the elements.When I'm compiling this programm,the compiler can't identify the "box" ( 7 line source code).What I'm doing wrong? Thanks very much!


Here is the source code:
import java.util.*;
public class TicketPool
{ public static void TicketPool(){
ArrayList box;
box=new ArrayList();}

public static void AddTickets() {

box.add(new Ticket()); //cannot find symbol

}

public static void DisplayElements(){
ArrayList box;
box=new ArrayList();
box.add(new Ticket());
for(int i=0; i<box.size(); i++)
System.out.println(box.get(i));
}
}

[KevinWorkman]

Where do you declare box? If it's inside a method, that's the only place it will be available. If you declare two different variables both named box in two different methods, those are two completely different values.

[turtlish]

Can I declare a box outside a method so it can be the same for the class? I'm really sorry maybe all these questions sounds to stupid, but I'm really new and confused to Java

[KevinWorkman]

Can I declare a box outside a method so it can be the same for the class? I'm really sorry maybe all these questions sounds to stupid, but I'm really new and confused to Java

What happened when you tried?

[turtlish]

It says identifier expected (box=new ArrayList(); )

[KevinWorkman]

It says identifier expected (box=new ArrayList(); )

I don't see a declaration there, only an attempted instantiation.

[turtlish]

This is how I did it.I wrote only the parenthesis because that was the line that the error comes up

import java.util.*;
public class TicketPool{
ArrayList box;
box=new ArrayList();


public static void AddTickets() {

box.add(new Ticket());

}
}

[JosAH]

Please show us the complete (relevant) code because what you've shown us in reply #7 doesn't match with what you showed us in your original post.

kind regards,

Jos

[turtlish]

Hello! This is code (while I'm trying to make the array list outside a method)
import java.util.*;
public class TicketPool{
ArrayList box;
box=new ArrayList();


public static void AddTickets() {

box.add(new Ticket());

}

public static void DisplayElements(){

for(int i=0; i<box.size(); i++)
System.out.println(box.get(i));
}
}

[JosAH]

You can't have ordinary statements (or expressions) outside of a method body; change the first two lines in your class to one single line to make it an initializer declaration:

ArrayList box= new ArrayList();

kind regards,

Jos

[turtlish]

Thank you very much! :)