- Running tasks concurrently on multiple threads
- getSupportFragmentManager (FragmentActivity)
- notifyDataSetChanged (ArrayAdapter)
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- InputStreamReader (java.io)
A class for turning a byte stream into a character stream. Data read from the
source input stream is
- Date (java.util)
A specific moment in time, with millisecond precision. Values typically come
from System#currentTime
- HashSet (java.util)
HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
- Random (java.util)
This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- Callable (java.util.concurrent)
A task that returns a result and may throw an exception. Implementors define a
single method with no
- ReentrantLock (java.util.concurrent.locks)
A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
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