- Running tasks concurrently on multiple threads
- getContentResolver (Context)
- getSupportFragmentManager (FragmentActivity)
- onRequestPermissionsResult (Fragment)
- Date (java.util)
A specific moment in time, with millisecond precision. Values typically come
from System#currentTime
- PriorityQueue (java.util)
A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
- Random (java.util)
This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- TimerTask (java.util)
The TimerTask class represents a task to run at a specified time. The task may
be run once or repeat
- Cipher (javax.crypto)
This class provides access to implementations of cryptographic ciphers for
encryption and decryption
- Graphics2D (java.awt)
This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics
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