Lottery program is stuck in an infinite loop

Question

I'm creating a lottery program, and I used a set class I created instead of the java set.

Heres's my Set class; it does the basic functions of a Java set

import java.util.*;

public class mySet<T>
{
    private Set<T> yourSet=new HashSet<T>();
    T number;
    mySet()
    {
    }

    private mySet(Set<T> yourSet)
    {
        this.yourSet=yourSet;
    }

    public void print()
    {
        if(isEmpty())
            System.out.println("Your set is empty");
        else
            System.out.println(yourSet);
    }
    //public
    public void addToSet(T number)
    {
        this.number=number;
        yourSet.add(number);
    }
    public boolean isEmpty()
    {
        return (yourSet==null);

    }

    public int getCardinality()
    {
        int size=0;
        size=yourSet.size();
        return(size);
    }

    public void clear()
    {
        yourSet.clear();
    }

    public boolean isInSet(int value)
    {
        if(isEmpty())
        {
            System.out.println("The set is empty");
        }
        else
        {
            yourSet.contains(value);
            return true;
        }
        return false;

    }

    public mySet <T>intersection(mySet<T> setb)
    {
        Set<T> newSet=new HashSet<>(yourSet);
        newSet.retainAll(setb.yourSet);
        return new mySet<>(newSet);
    }
}

Here's the program that gets and validates the user's input

public mySet userLottery(mySet userStore){
    
    for (int x=0;x<6;x++)
    {
        int user=getUser("Please enter your lottery number : ");

        if(userStore.isInSet(user) )// checks if the number entered by the user have been entered before
        {
            x--;
            System.out.println("No duplicates are allowed");
            continue;
        }
        else if (user>=LOTTERY_MAX )// checks if the user entered a number that is higher than the Lottery max
        {
            x--;
            System.out.println("The value you entered must be lower than the limit "+"("+LOTTERY_MAX+")");
            continue;
        }
        else if (user<1 )//prevents the user from entering a number less than 1
        {
            x--;
            System.out.println("The value you entered must be greater than 0");
            continue;
        }

        else
        {
            userStore.addToSet(user);// adds the users input to the Set if it meets all conditions

        }
    }

    System.out.println("this is the users input : "+userStore);//prints out the users input
    return userStore;
}

LOTTERY_MAX is the maximum range of the lottery number, and the user selects the range.

When I run the program and input numbers, it prints out no duplicates allowed, and it's stuck in an infinite loop somehow. I tried clearing the set from the start, but the same issue continues. When I removed the if statements, the program runs as expected, but then there is nothing to validate the user's input. The program is meant to take user input put it in a set, cross-check it against a set of computer-generated numbers.

Answer 1

public boolean isEmpty()
{
    return (yourSet==null);

}

this is not how you would check if your set is empty or not. This is how you'd like to do it:

public boolean isEmpty()
{
    return (yourSet==null || yourSet.isEmpty());

}

EDIT: I don't understand why you are wrapping HashSet instead using it directly. You would have avoided so many problems if you did that. Those classes exist for a reason. Learn to utilize them properly.