- Running tasks concurrently on multiple threads
- scheduleAtFixedRate (Timer)
- addToBackStack (FragmentTransaction)
- setRequestProperty (URLConnection)
- FileOutputStream (java.io)
An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
- Format (java.text)
The base class for all formats. This is an abstract base class which specifies
the protocol for clas
- Set (java.util)
A Set is a data structure which does not allow duplicate elements.
- SortedMap (java.util)
A map that has its keys ordered. The sorting is according to either the natural
ordering of its keys
- StringUtils (org.apache.commons.lang)
Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
- Graphics2D (java.awt)
This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics
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