- Running tasks concurrently on multiple threads
- onRequestPermissionsResult (Fragment)
- addToBackStack (FragmentTransaction)
- setRequestProperty (URLConnection)
- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- InetAddress (java.net)
An Internet Protocol (IP) address. This can be either an IPv4 address or an IPv6
address, and in pra
- SecureRandom (java.security)
This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
- ServletException (javax.servlet)
Defines a general exception a servlet can throw when it encounters difficulty.
- Base64 (org.apache.commons.codec.binary)
Provides Base64 encoding and decoding as defined by RFC 2045.This class
implements section 6.8. Base
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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