- Running tasks concurrently on multiple threads
- addToBackStack (FragmentTransaction)
- getApplicationContext (Context)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- File (java.io)
An "abstract" representation of a file system entity identified by a pathname.
The pathname may be a
- Dictionary (java.util)
Note: Do not use this class since it is obsolete. Please use the Map interface
for new implementatio
- Random (java.util)
This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- ConcurrentHashMap (java.util.concurrent)
A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
version is based on or
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
- 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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