- Running tasks concurrently on multiple threads
- scheduleAtFixedRate (ScheduledExecutorService)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
- Selector (java.nio.channels)
A controller for the selection of SelectableChannel objects. Selectable channels
can be registered w
- Calendar (java.util)
Calendar is an abstract base class for converting between a Date object and a
set of integer fields
- LinkedList (java.util)
Doubly-linked list implementation of the List and Dequeinterfaces. Implements
all optional list oper
- PriorityQueue (java.util)
A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
- IOUtils (org.apache.commons.io)
General IO stream manipulation utilities. This class provides static utility
methods for input/outpu
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