Passing objects to classes

[Catfish1]

Hi
I'm having a problem trying to create a class which contains a group of another class I have made. Basically I have a class called square, which looks like this

class Square
{
	int number;

	public Square()
	{
	
	}

	public void setNumber(int num)
	{
		if((num > 0) && (num <= 9))
		{
			set.clear();
			set.add(num);
			number = num;
		}
		else
		{
			System.out.println("You have entered an illegal number");
		}
	}

	public int getNumber()
	{
		return number;
	}
}

And I want to have another class which contains two squares. So something like this.

class pair
{
	public pair(Square s, Square s2)
	{

	}
}

However, I know this won't really do what I want it to do, as I need the Squares s and s2, to be updated when I update the original square in my main program. So if I did something like this in my main program:

Square b = new Square();
Square c = new Square();

pair p = new pair(b,c);

c.setNumber(7);

c in pair would update to 7 as well. Is there anyway of doing this? Thanks.

[KevinWorkman]

What happened when you tried exactly that? That should work just fine. If not, you should post an SSCCE demonstrating what you're actually doing.

[Catfish1]

Sorry, apologies I missed out the fact that I need to be able to interact with the variables in pair, using a get method or something similar to return the variables in it like:

class pair
{
	public pair(Square s, Square s2)
	{

	}
        public Square getSquare()
        {
              return s;
        }
}

However if I do this, it can't find variable s, which I understand why it can't, as it is local, but if I create a Square within the class to get the value, it won't update if I update the square in the main program

[KevinWorkman]

Then just keep track of the Square instances you pass in. Like this example:

public class Cat{
   String myName;
   public Cat(String name){
      myName = name;
   }
   public String getName(){
      return myName;
   }
}