soccer players

package lessons;
import javax.swing.JOptionPane;
public class SoccerTeams
{
//prgm calaculates number of teams a league ,ay create based on available players,
	//each team has 9-15 players
	public static void main(String[] args)
	{
		String in;
		int players, teamSize, teamN, leftover;
		 final int MIN_PLAYERS = 9;
		 final int MAX_PLAYERS = 15;
		in = JOptionPane.showInputDialog(null,"how many players do you want on each team,"
				+ " number bust be 9-15");
				teamSize = Integer.parseInt(in);
		while (teamSize < MIN_PLAYERS && teamSize > MAX_PLAYERS)
		{
			in = JOptionPane.showInputDialog(null,"the number must be atleast "
		+MIN_PLAYERS+" - "+MAX_PLAYERS);
			teamSize = Integer.parseInt(in);
		}


		in = JOptionPane.showInputDialog(null, "how many players are participating?");
		players = Integer.parseInt(in);

		while (players < 0)
		{
			in = JOptionPane.showInputDialog(null,"enter 0 or greater");
			players = Integer.parseInt(in);
		}

				leftover = players % teamSize;
				teamN = players / teamSize;

				JOptionPane.showMessageDialog(null, "there can be "+teamN+" teams of "
				+teamSize+" players with "+leftover+" players left over");
	}

}