Java- give every instance of object an unique number

Question

I\'m having trobule writing a simple program in java.

I have a class called ticket, where I have:

public class Ticket {
public String movieTitle = null;
         


        

Answer 1

I think it is because you are using wrapper classes, i.e. Integer instead of int, which means that inside the class field you are only storing the reference. That means that in your constructor you are actually linking each class' currentMovieNumber to the static movieNumber so that when you increment the movieNumber, since all the instances' numbers point to it, every Ticket will have the same incremented number.

Using int instead of Integer should solve this.