Java中条件变量使用示例及性能测试

来源：互联网发布：ubuntu mate 输入法编辑：程序博客网时间：2024/05/01 09:10

   和前篇文章一样的目的，测试结果也差不多，不过java中的条件变量效率略高于boost，结果是每秒大概20w出头。

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package com.cc;

public class Test {

    staticboolean running_flag = true;
    staticObject obj = new Object();
    static intcnt = 0;
    staticboolean ball = true;

    privatestatic class Run1 implements Runnable {
          public Run1(){}

          public voidrun() {
             int i =0;
            while(running_flag){
               synchronized(obj)
                {
                   while (ball!= true && running_flag){
                      try {
                        obj.wait();
                      } catch(InterruptedException e) {
                        e.printStackTrace();
                     }
                   }
                   ++i;
                   ++cnt;
                   if(running_flag){
                      ball =false;
                     obj.notifyAll();
                   }
               }
            }
            synchronized(obj)
             {
               System.out.println(i);
            }
          }
    }

    private static class Run2 implements Runnable{
          public Run2(){}

          public voidrun() {
             int i =0;
            while(running_flag){
               synchronized(obj)
                {
                   while (ball!= false && running_flag){
                      try {
                        obj.wait();
                      } catch(InterruptedException e) {
                        e.printStackTrace();
                     }
                   }
                   ++i;
                   ++cnt;
                   if(running_flag){
                      ball =true;
                     obj.notifyAll();
                   }
               }
            }
            synchronized(obj)
             {
               System.out.println(i);
            }
          }
    }

    publicstatic void main(String[] args) throws InterruptedException {
       Threadthread1 = new Thread(new Run1());
       Threadthread2 = new Thread(new Run2());
      thread1.start();
      thread2.start();
      Thread.sleep(1000);
       running_flag= false;
      synchronized(obj)
       {
         obj.notifyAll();
       }
      thread1.join();
      thread2.join();
      System.out.println(cnt);
    }

}
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