public class Customer implements Comparable<Customer>		// Customer for the bank simulation, implements compareTo for PriorityQueue
{
	private int inTime, serviceTime;		// inTime is the time of the simulation in which Customer enters queue, serviceTime is amount of
											// time Customer will need help by a Teller
	public Customer(int i, int s)
	{
		inTime=i;							// initialize the instance data
		serviceTime=s;
	}
	
	public void isServiced()				// in each minute of the simulation, the Teller will serivce a customer (if any) by calling
	{										// this method to denote that this Customer has been served 1 more minute of the Customer's
		serviceTime--;						// original serviceTime
	}
	
	public boolean done()					// Customer is done once serviceTime decrements to 0
	{
		return (serviceTime==0);
	}
	
	public int getInTime()					// need to compute Customer's wait time which is currentTime - inTime
	{
		return inTime;
	}
	
	public int getServiceTime()				// needed for compareTo to compare _this_ Customer to another Customer
	{
		return serviceTime;
	}
	
	public int compareTo(Customer c)		// used for PriorityQueue to determine where this Customer should go in line, ordered by
	{										// serviceTime in ascending order with inTime as tie-breaker
		if(serviceTime>c.getServiceTime()) return 1;
		else if(serviceTime<c.getServiceTime()) return -1;
		else return inTime-c.getInTime();
	}
}