- Running tasks concurrently on multiple threads
- scheduleAtFixedRate (Timer)
- getSharedPreferences (Context)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- FileNotFoundException (java.io)
Thrown when a file specified by a program cannot be found.
- FileReader (java.io)
A specialized Reader that reads from a file in the file system. All read
requests made by calling me
- KeyStore (java.security)
KeyStore is responsible for maintaining cryptographic keys and their owners.
The type of the syste
- GregorianCalendar (java.util)
GregorianCalendar is a concrete subclass of Calendarand provides the standard
calendar used by most
- Random (java.util)
This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- Collectors (java.util.stream)
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