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jgrowing's Issues

一起撸文档

有很多内容可写,没有动力,mark一下,定时产出,一起分享

ISSUEA

---来自漂亮帅气的GitHub小程序kakaCoder:

CompletionService/ListenableFuture的意义探讨

您好,很高兴看到这个项目,非常受益。有点问题想跟您讨论下。

  1. CompletionService是通过内部队列保存线程执行的结果,并保证了先执行完线程的结果会优先进入队列;然而,很难想到有啥实际的应用场景。第一,如果是为了拿每个线程的结果做二次处理,那么完全可以放在各个子线程中去处理;第二,如果是为了拿到所有线程的执行结果返回给上层服务,那么可以采用CompletableFuture.allOf来做。。。求大神指教。
  2. ListenableFuture是添加了监听的功能,当执行完成或者抛出异常后,做处理。。。既然这样,为什么不是在子线程执行中直接做处理呢?感觉很奇怪。。求大神指教

请问,这个项目还维护吗?

我看了 《为什么开发人员必须要了解数据库锁?》 这篇文章,发现图床都失效了,最下面 [何大师的MySQL 加锁处理分析](http://hedengcheng.com/?p=771#_Toc374698317)这个链接也失效了。

+1

菜鸟一只,我也想学java

synchronized为啥会阻塞同一个类中的方法?求解

情况A:有可能t线程已经在执行了,但是由于m2先进入了同步代码块,这个时候t进入阻塞状态,然后主线程也将会执行输出,这个时候又有一个争议到底是谁先执行?是t先执行还是主线程,这里有小伙伴就会把第3点拿出来说,肯定是先输出啊,t线程不是阻塞的吗,调度到CPU肯定来不及啊?很多人忽略了一点,synchronized其实是在1.6之后做了很多优化的,其中就有一个自旋锁,就能保证不需要让出CPU,有可能刚好这部分时间和主线程输出重合,并且在他之前就有可能发生,b先等于1000,这个时候主线程输出其实就会有两种情况。2000 或者 1000。

欢迎加入javagrowing开源组织

Hello,欢迎您加入javagrowing开源组织,希望一起学习Java,但学到的不仅仅是Java。和大家参与开源项目不仅仅对自己个人成长非常有帮助,并且还会扩大你自己的影响力,让更多的人能分享到你的知识。

如何加入

直接在issue下面留言,我将会邀请你进入https://github.com/javagrowing , 然后到 https://github.com/javagrowing 这个页面中进行接受邀请。同时最好将你自己的可见性设置为public。

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