ui.java

排队论模拟,最近刚刚找到的

/*
**********************************************************************************************************************
	Wal-Mart Checkout Simulation
	By: Dustin Grimmeissen and Richard Anderson

	-> UI Class

	This class generates the graphical user interface for the Wal-Mart simulation program.
**********************************************************************************************************************
*/

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

public class UI implements ActionListener
{
	Simulation TheApp;
	boolean SimulationStarted = false;

	JFrame frame = new JFrame("Wal-Mart Checkout Simulation");
	JButton StartButton = new JButton(new ImageIcon("images/StartButton.gif"));
	JButton ExitButton = new JButton(new ImageIcon("images/ExitButton.gif"));

	ImageIcon BackgroundImage = new ImageIcon("images/Background.gif");
	JLabel Background = new JLabel(BackgroundImage);
	JPanel MainPanel = new JPanel();

	JTextArea ProcessText = new JTextArea();
	JTextArea FinishedText = new JTextArea();
	JScrollPane ScrollBox = new JScrollPane(FinishedText);

	//------------------------------------------------------------------------
	// Constructor - The constructor keeps a pointer back to the simulation
	//		     application and initializes the program's buttons.
	//------------------------------------------------------------------------
	public UI( Simulation App )
	{
		TheApp = App;
		StartButton.addActionListener(this);
		ExitButton.addActionListener(this);
	}

	//------------------------------------------------------------------------
	// Initialize - Places all labels, buttons, and text fields into the graphical
	//		    user interface and prepares them to display information from
	//		    the simulation program.
	//------------------------------------------------------------------------
	public void Initialize()
	{
		// place all labels, buttons, and text fields into the JFrame
		MainPanel.setOpaque(false);
		frame.setSize(400, 700);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Background.setBounds(0, 0, 400, 700);
		frame.getLayeredPane().add(Background, new Integer(Integer.MIN_VALUE));
		frame.setContentPane( MainPanel );

		MainPanel.setLayout(new BoxLayout(MainPanel, BoxLayout.Y_AXIS));
		MainPanel.setOpaque(false);

		StartButton.setAlignmentX(Component.CENTER_ALIGNMENT);
		ExitButton.setAlignmentX(Component.CENTER_ALIGNMENT);

		MainPanel.add(Box.createRigidArea(new Dimension(0,105)));
		MainPanel.add(StartButton);
		MainPanel.add(Box.createRigidArea(new Dimension(0,5)));
		MainPanel.add(ExitButton);
		MainPanel.add(Box.createRigidArea(new Dimension(0,15)));

		ProcessText.setMaximumSize(new Dimension(375,80));
		MainPanel.add(ProcessText);

		MainPanel.add(Box.createRigidArea(new Dimension(0,15)));

		FinishedText.setFont(new Font("Courier New", Font.PLAIN, 11));
		ScrollBox.setMaximumSize(new Dimension(375,340));
		MainPanel.add(ScrollBox);

		frame.setVisible(true);
	}

	//------------------------------------------------------------------------
	// FinishSimulation - Prints the final results of the simulation in the
	//			    results text box.
	//------------------------------------------------------------------------
	public void FinishSimulation(double NumCustomers[], double TotalWait[], double TotalResponse[], double ArrivalRate, Queue CheckoutLane[], int NumberLanes)
	{
		StartButton.setIcon(new ImageIcon("images/StartButton.gif"));
		SimulationStarted = false;

		String FinishText = new String("");

		for (int i = 0; i < (NumberLanes + 1); i++)
		{
			if (i != NumberLanes)
				FinishText += (" Queue " + (i+1) + " --- Arrival:       " + (ArrivalRate*(1.0/(double)(NumberLanes))) + "\n             Departure:     " + CheckoutLane[i].getRate() + "\n             Customers:     " + NumCustomers[i] + "\n             Avg. Wait:     " + (TotalWait[i])/(NumCustomers[i]) + "\n             Avg. Response: " + (TotalResponse[i])/(NumCustomers[i]) + "\n\n");
			else
				FinishText += ("  Total  --- Customers:     " + NumCustomers[i] + "\n             Avg. Wait:     " + (TotalWait[i])/(NumCustomers[i]) + "\n             Avg. Response: " + (TotalResponse[i])/(NumCustomers[i]));
		}

		FinishedText.setText(FinishText);
	}

	//------------------------------------------------------------------------
	// setProcessText - Updates the text that displays each queue length.
	//------------------------------------------------------------------------
	public void setProcessText(String text)
	{
		ProcessText.setText(text);
	}

	//------------------------------------------------------------------------
	// actionPerformed - This function handles all button clicks throughout the
	// 			   program.  If the start button is clicked a series of
	//			   pop-up menus appear asking the user to enter the
	//			   number of queues, the arrival rate, and the service
	//			   rates.
	//------------------------------------------------------------------------
	public void actionPerformed(ActionEvent e)
	{
		if (e.getSource() == this.ExitButton)
		{
			System.exit(0);
		}
		else if (e.getSource() == this.StartButton)
		{
			if (!SimulationStarted)
			{
				boolean cancel = false;

				int NumQueues = 1;
				int NumExpress = 0;
				double ArrivalRate = 0.5;
				double RegularLane = 0.1667;
				double ExpressLane = 0.3333;

				String NumberQueues = JOptionPane.showInputDialog("How Many Queues Would You Like To Simulate? (1-5): ");

				if (NumberQueues == null)
				{
					cancel = true;
				}
				else
				{
					try
					{
						NumQueues = Integer.parseInt(NumberQueues);

						if ((NumQueues < 1) || (NumQueues > 5))
						{
							JOptionPane.showMessageDialog(null, "Incorrect Input", "Error", JOptionPane.ERROR_MESSAGE);
							cancel = true;
						}
						else
						{
							int exit = 0;
							while (exit == 0)
							{
								exit = 1;
								String Arrival = JOptionPane.showInputDialog("Enter The Arrival Rate: ");
								try
								{
									ArrivalRate = Double.parseDouble(Arrival);
								}
								catch (NumberFormatException e1)
								{
									JOptionPane.showMessageDialog(null, "Incorrect Input, Try Again", "Error", JOptionPane.ERROR_MESSAGE);
									exit = 0;
								}
							} 

							exit = 0;
							while (exit == 0)
							{
								exit = 1;
								String Regular = JOptionPane.showInputDialog("Enter The Service Rate: ");
								try
								{
									RegularLane = Double.parseDouble(Regular);
								}
								catch (NumberFormatException e1)
								{
									JOptionPane.showMessageDialog(null, "Incorrect Input, Try Again", "Error", JOptionPane.ERROR_MESSAGE);
									exit = 0;
								}
							}

							int ExpressYesNo = JOptionPane.showConfirmDialog(null, "Would You Like To Have Express Lanes?", "Express Lanes", JOptionPane.YES_NO_OPTION);

							if (ExpressYesNo == JOptionPane.YES_OPTION)
							{
								exit = 0;
								while (exit == 0)
								{
									exit = 1;
									String Express = JOptionPane.showInputDialog("Enter The Service Rate For Express Lanes: ");
									try
									{
										ExpressLane = Double.parseDouble(Express);
									}
									catch (NumberFormatException e1)
									{
										JOptionPane.showMessageDialog(null, "Incorrect Input, Try Again", "Error", JOptionPane.ERROR_MESSAGE);
										exit = 0;
									}
								}
	
								exit = 0;
								while (exit == 0)
								{
									exit = 1;
									String ExpressNumber = JOptionPane.showInputDialog("How Many Express Lanes Do You Want? (1-" + NumQueues + "): ");
									try
									{
										NumExpress = Integer.parseInt(ExpressNumber);
										if ((NumExpress < 1) || (NumExpress > NumQueues))
										{
											JOptionPane.showMessageDialog(null, "Incorrect Input, Try Again", "Error", JOptionPane.ERROR_MESSAGE);
											exit = 0;
										}
									}
									catch (NumberFormatException e1)
									{
										JOptionPane.showMessageDialog(null, "Incorrect Input, Try Again", "Error", JOptionPane.ERROR_MESSAGE);
										exit = 0;
									}
								}
							}
						}
					}
					catch (NumberFormatException e1)
					{
						JOptionPane.showMessageDialog(null, "Incorrect Input", "Error", JOptionPane.ERROR_MESSAGE);
						cancel = true;
					}
				}

				if (cancel == false)
				{
					StartButton.setIcon(new ImageIcon("images/RunningButton.gif"));
					SimulationStarted = true;

					TheApp.setValues(NumQueues, NumExpress, ArrivalRate, RegularLane, ExpressLane);

					Thread newThread = new Thread(TheApp, "Simulation");
					newThread.start();
				}
			}
		}
	}
}