- Running tasks concurrently on multiple threads
- setRequestProperty (URLConnection)
- getExternalFilesDir (Context)
- putExtra (Intent)
- SecureRandom (java.security)
This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
- Format (java.text)
The base class for all formats. This is an abstract base class which specifies
the protocol for clas
- Calendar (java.util)
Calendar is an abstract base class for converting between a Date object and a
set of integer fields
- Collections (java.util)
This class consists exclusively of static methods that operate on or return
collections. It contains
- Properties (java.util)
A Properties object is a Hashtable where the keys and values must be Strings.
Each property can have
- Color (java.awt)
The Color class is used to encapsulate colors in the default sRGB color space or
colors in arbitrary
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