supermarket.java

java编程开发技巧与实例的编译测试通过的所有例程

import java.awt.*;
import java.awt.event.*;

public class Supermarket extends Business
{
	private Queue[] queue	=	new Queue[Simulator.NUM_AGENTS];
	public Supermarket()
	{
		super("The Supermarket");
		for (int i =0; i < queue.length; i ++)
			queue[i]	=	new Queue();
	}
	public void updateDisplay()
	{
		labelServed.setText("Customers served: " + numCustomer);
		if (numCustomer != 0)
			labelWait.setText("average wait: " + (totalWait / numCustomer));
		int totalSize = 0;
		for (int i = 0; i < numAgents; i ++)
		{
			totalSize	+=	queue[i].getSize();
			String	s	=	"Agent " + i + ": served " + agent[i].getHandled();
			labelAgent[i].setText(s + " [" + queue[i].getSize() + " waiting]");
		}
		for (int i = numAgents; i < Simulator.NUM_AGENTS; i ++)
			labelAgent[i].setText("agent " + i + ": inactive");
		labelQueue.setText("Customers waiting: " + totalSize);
	}
	public void generateCustomer()
	{
		int index = 0;
		for (int i = 0; i < numAgents; i ++)
			if (queue[i].getSize() < queue[index].getSize())
				index = i;
		queue[index].insert(new Customer());
	}
	public Customer requestCustomerFor(int ID)
	{
		return queue[ID].requestCustomer();
	}
}