simulator.java

Java程序设计技巧与开发实例附书源代码。

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

public class Simulator
    extends Frame
    implements ActionListener
{
  protected static final int NUM_AGENTS = 10;
  protected static final int NUM_INITIAL_AGENTS = 6;
  protected static final int MAX_CUSTOMER_DELAY = 9000;
  protected static final int MAX_TELLER_BREAK = 1000;
  protected static final int MAX_NO_CUSTOMERS = 2000;
  private Button open = new Button("开立账户");
  private Button close = new Button("取消账户");
  private Button add = new Button("添加处理者");
  private Button del = new Button("删除处理者");
  private Bank bank = new Bank();
  private Supermarket supermarket = new Supermarket();

  private class WindowCloser
      extends WindowAdapter
  {
    public void windowClosing(WindowEvent we)
    {
      bank.stop();
      supermarket.stop();
      System.exit(0);
    }
  }

  public Simulator()
  {
    super("模拟银行和超市");
    Panel buttons = new Panel();
    buttons.setLayout(new FlowLayout());
    buttons.add(open);
    open.addActionListener(this);
    buttons.add(close);
    close.addActionListener(this);
    buttons.add(add);
    add.addActionListener(this);
    buttons.add(del);
    del.addActionListener(this);
    addWindowListener(new WindowCloser());

    setLayout(new BorderLayout());
    add("West", bank);
    add("East", supermarket);
    add("South", buttons);
    validate();
    pack();
    show();

    bank.start();
    supermarket.start();
  }

  public void actionPerformed(ActionEvent ae)
  {
    if (ae.getSource() == open)
    {
      bank.openDoor();
      supermarket.openDoor();
    }
    else if (ae.getSource() == close)
    {
      bank.closeDoor();
      supermarket.closeDoor();
    }
    else if (ae.getSource() == add)
    {
      bank.addAgent();
      supermarket.addAgent();
    }
    else if (ae.getSource() == del)
    {
      bank.retireAgent();
      supermarket.retireAgent();
    }
  }

  public static void main(String args[])
  {
    Simulator smlt = new Simulator();
  }
}