//A Class to represent an n-sided die (plural dice)
import java.util.Random;
public class Die
{
   //Used in simulating the toss of a die
	private static Random generator = new Random();
	
	private int numberOfFaces; //Number of faces (sides)
	private int upFace;        //Top face, after tossing
	
   //Constructor: Create a Die with any (>0) number of sides
	public Die(int numberOfFaces)
	{
		if (numberOfFaces < 1)
			throw new RuntimeException("# sides <= 0");
	
		this.numberOfFaces = numberOfFaces;
		
		this.toss();
	}
	
   //Constructor: Default - Creates a 6-sided Die
	public Die()
	{
		this(6);
	}

   //Accessor: returns the size (number of faces) of this Die
	public int getNumberOfFaces()
	{
		return this.numberOfFaces;
	}

   //Accessor: returns the number of the top face of this Die
	public int getUpFace()
	{
		return this.upFace;
	}
	
   //Mutator: simulates tossing this Die
	public void toss()
	{
		this.upFace = generator.nextInt(this.numberOfFaces) + 1;
	}
}