ydl19的专栏

ScheduledExecutorService has 2 method to schedule a taskschedule with fixed delayschedule at fixed rateI was confused about delay and rate, they both require a time parameter. What's the dif...

I am trying to understand the difference between matches() and find(). matches() tries to match the expression against the entire string and implicitly add a ^ at the start and $ at the end of y...

Regarding following class: We define a generic class, but we donot have a method to resolve the generic.public final class Event<T> { private T event; private Event() {}...

 Runtime.getRuntime().addShutdownHook(Thread);Before JVM shut down, it will call each hook you added.