- Running tasks concurrently on multiple threads
- getApplicationContext (Context)
- startActivity (Activity)
- getExternalFilesDir (Context)
- BigInteger (java.math)
An immutable arbitrary-precision signed integer.FAST CRYPTOGRAPHY
This implementation is efficient f
- Proxy (java.net)
This class represents proxy server settings. A created instance of Proxy stores
a type and an addres
- DateFormat (java.text)
Formats or parses dates and times.This class provides factories for obtaining
instances configured f
- Calendar (java.util)
Calendar is an abstract base class for converting between a Date object and a
set of integer fields
- HashMap (java.util)
HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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