经典的生产者消费者问题模拟。此程序模拟最简单情形——单缓冲。为模拟实际情况，consume item和produce item时加了延时，可以通过修改延时模拟不同的生成消费速率。

[code]

[/co/**
 * single buffer consumer-producer problem.
 * by xu(xusiwei1236@163.com).
 * */
public class ConsumerProducer {

 static Object buffer = null;

 static Object mutex = new Object();

 static Object condConsumer = new Object();

 static Object condProducer = new Object();

 public static void main(String[] args) {
  Thread producer = new Thread() {
   public void run() {
//    for(int i=0; i