- Running tasks concurrently on multiple threads
- getExternalFilesDir (Context)
- getSharedPreferences (Context)
- setRequestProperty (URLConnection)
- PrintWriter (java.io)
Wraps either an existing OutputStream or an existing Writerand provides
convenience methods for prin
- Date (java.util)
A specific moment in time, with millisecond precision. Values typically come
from System#currentTime
- Random (java.util)
This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- Set (java.util)
A Set is a data structure which does not allow duplicate elements.
- ExecutorService (java.util.concurrent)
An Executor that provides methods to manage termination and methods that can
produce a Future for tr
- Filter (javax.servlet)
A filter is an object that performs filtering tasks on either the request to a
resource (a servlet o
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