- Running tasks concurrently on multiple threads
- addToBackStack (FragmentTransaction)
- runOnUiThread (Activity)
- scheduleAtFixedRate (Timer)
- File (java.io)
An "abstract" representation of a file system entity identified by a pathname.
The pathname may be a
- PrintStream (java.io)
Fake signature of an existing Java class.
- URLConnection (java.net)
A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
- Collections (java.util)
This class consists exclusively of static methods that operate on or return
collections. It contains
- Map (java.util)
A Map is a data structure consisting of a set of keys and values in which each
key is mapped to a si
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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