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- findViewById (Activity)
- scheduleAtFixedRate (Timer)
- getSharedPreferences (Context)
- FileWriter (java.io)
A specialized Writer that writes to a file in the file system. All write
requests made by calling me
- URL (java.net)
A Uniform Resource Locator that identifies the location of an Internet resource
as specified by RFC
- SortedMap (java.util)
A map that has its keys ordered. The sorting is according to either the natural
ordering of its keys
- ConcurrentHashMap (java.util.concurrent)
A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
version is based on or
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- Graphics2D (java.awt)
This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics
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