题目如下：

/*
模拟实现银行业务调度系统逻辑，具体需求如下：

银行内有6个业务窗口，1 - 4号窗口为普通窗口，5号窗口为快速窗口，6号窗口为VIP窗口。
有三种对应类型的客户：VIP客户，普通客户，快速客户（办理如交水电费、电话费之类业务的客户）。
异步随机生成各种类型的客户，生成各类型用户的概率比例为：
VIP客户：普通客户：快速客户  =  1 ：6 ：3。

客户办理业务所需时间有最大值和最小值，在该范围内随机设定每个VIP客户以及普通客户办理业务所需的时间，快速客户办理业务所需时间为最小值（提示：办理业务的过程可通过线程Sleep的方式模拟）。
各类型客户在其对应窗口按顺序依次办理业务。
当VIP（6号）窗口和快速业务（5号）窗口没有客户等待办理业务的时候，这两个窗口可以处理普通客户的业务，而一旦有对应的客户等待办理业务的时候，则优先处理对应客户的业务。
随机生成客户时间间隔以及业务办理时间最大值和最小值自定，可以设置。
不要求实现GUI，只考虑系统逻辑实现，可通过打印的方式展现程序运行结果。
*/

Customer.java 本源文件定义了三种客户，以及枚举类型的客户类型。

package banktellersimulation;

enum CUSTOMER{
	VIP, //1
	ORDINARY, //6
	QUICK  //3
}
public class Customer {
	private final CUSTOMER id;
	private final int servicetime;
	
	public Customer(CUSTOMER customer){
		if (customer == CUSTOMER.VIP){
			servicetime = 500;
		} else if (customer == CUSTOMER.ORDINARY){
			servicetime = 300;
		} else {
			servicetime = 100;
		} 
		id = customer;
	}
	
	public int getServiceTime(){
		return servicetime;
	}
	public String toString(){
		return id.toString() + ":" + getServiceTime();
	}
}

package banktellersimulation;

import java.util.ArrayList;
import java.util.Random;
import java.util.concurrent.ArrayBlockingQueue;

import com.sun.org.apache.xalan.internal.xsltc.compiler.sym;

public class CustomerGenerator implements Runnable{
	private ArrayBlockingQueue<Customer> customerlinevip;
	private ArrayBlockingQueue<Customer> customerlineoridinary;
	private ArrayBlockingQueue<Customer> customerlinequick;
	private Random rand = new Random();
	private double[] data = http://www.mamicode.com/new double[]{0.0, 0.1, 0.7, 1.0};>
Window.java模拟银行的窗口类
package banktellersimulation;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;

public class Window implements Runnable{
	private final int id;
	private ArrayBlockingQueue<Customer> customerlinevip;
	private ArrayBlockingQueue<Customer> customerlineoridinary;
	private ArrayBlockingQueue<Customer> customerlinequick;
	public Window(int id, ArrayBlockingQueue<Customer> customerlinevip,
			ArrayBlockingQueue<Customer> customerlineoridinary,
			ArrayBlockingQueue<Customer> customerlinequick){
		this.customerlinevip = customerlinevip;
		this.customerlineoridinary = customerlineoridinary;
		this.customerlinequick = customerlinequick;
		this.id = id;
	}
	@Override
	public void run() {
		try{
			while (!Thread.interrupted()){
				Customer temp = null;
				if (id >= 1 && id <= 4){
					temp = customerlineoridinary.take();
					TimeUnit.MICROSECONDS.sleep(temp.getServiceTime());
				} else if (id == 5){
					if (customerlinequick.size() == 0 && customerlineoridinary.size() != 0){
						temp = customerlineoridinary.take();
						TimeUnit.MICROSECONDS.sleep(temp.getServiceTime());
					} else {
						temp = customerlinequick.take();
						TimeUnit.MICROSECONDS.sleep(temp.getServiceTime());	
					}
				} else if (id == 6){
					if (customerlinevip.size() == 0 && customerlineoridinary.size() != 0){
						temp = customerlineoridinary.take();
						TimeUnit.MICROSECONDS.sleep(temp.getServiceTime());
					} else {
						temp = customerlinevip.take();
						TimeUnit.MICROSECONDS.sleep(temp.getServiceTime());	
					}
				}	
				System.out.println(temp + "deal by:" + this);
			}
		}catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
	public String toString(){
		return id + "";
	}

	
}

Bank.java测试类，线程运行的主函数

package banktellersimulation;

import java.util.concurrent.ArrayBlockingQueue;

public class Bank {
	public static void main(String[] args){
		ArrayBlockingQueue<Customer> customerlinevip = new ArrayBlockingQueue<Customer>(20);
		ArrayBlockingQueue<Customer> customerlineoridinary = new ArrayBlockingQueue<Customer>(20);
		ArrayBlockingQueue<Customer> customerlinequick = new ArrayBlockingQueue<Customer>(20);
		new Thread(new CustomerGenerator(customerlinevip, customerlineoridinary, customerlinequick)).start();
		for (int i = 1; i <=6 ;i++){
			new Thread(new Window(i, customerlinevip, customerlineoridinary, customerlinequick)).start();
		}
	}
}
代码纯粹个人编写，水平有限如果有什么错误，欢迎大家扶正。

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