guoyongxue的专栏

Few developers are aware of the difference between Y for "Week year" and y for Year when formatting and parsing a date with SimpleDateFormat. That's likely because for most dates, Week year and Year are the same, so testing at any time other than the first

java8 异步api、循环、日期 转载请注明出处：https://www.cnblogs.com/funnyzpc/p/10801470.html 异步api 对于多任务耗时的业务场景，一般我们会用到线程异步处理,在以前我们用 Thread 或者 Runnable 来实现异步，这是oracle官方做法，不过缺点很明显 对于复杂业务场景需要配置线程池 代码繁杂，对于新手容易造成不必要的bug 如果涉及到线程锁或线程通讯就棘手了 现在，java8为我们提供了CompletableFuture类，可