- Running tasks concurrently on multiple threads
- getSystemService (Context)
- scheduleAtFixedRate (Timer)
- putExtra (Intent)
- BufferedWriter (java.io)
Wraps an existing Writer and buffers the output. Expensive interaction with the
underlying reader is
- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- URLConnection (java.net)
A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
- ResultSet (java.sql)
An interface for an object which represents a database table entry, returned as
the result of the qu
- ReentrantLock (java.util.concurrent.locks)
A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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