- Running tasks concurrently on multiple threads
- getSystemService (Context)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- getResourceAsStream (ClassLoader)
- RandomAccessFile (java.io)
Allows reading from and writing to a file in a random-access manner. This is
different from the uni-
- Socket (java.net)
Provides a client-side TCP socket.
- Callable (java.util.concurrent)
A task that returns a result and may throw an exception. Implementors define a
single method with no
- XPath (javax.xml.xpath)
XPath provides access to the XPath evaluation environment and expressions.
Evaluation of XPath Expr
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
- Notification (javax.management)
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