- Creating JSON documents from java classes using gson
- scheduleAtFixedRate (ScheduledExecutorService)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- addToBackStack (FragmentTransaction)
- PrintWriter (java.io)
Wraps either an existing OutputStream or an existing Writerand provides
convenience methods for prin
- Runnable (java.lang)
Represents a command that can be executed. Often used to run code in a different
Thread.
- SecureRandom (java.security)
This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
- TreeSet (java.util)
TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
- HttpServlet (javax.servlet.http)
Provides an abstract class to be subclassed to create an HTTP servlet suitable
for a Web site. A sub
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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