- Running tasks concurrently on multiple threads
- getSystemService (Context)
- getSupportFragmentManager (FragmentActivity)
- addToBackStack (FragmentTransaction)
- FileWriter (java.io)
A specialized Writer that writes to a file in the file system. All write
requests made by calling me
- Proxy (java.net)
This class represents proxy server settings. A created instance of Proxy stores
a type and an addres
- SecureRandom (java.security)
This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
- DecimalFormat (java.text)
A concrete subclass of NumberFormat that formats decimal numbers. It has a
variety of features desig
- Dictionary (java.util)
Note: Do not use this class since it is obsolete. Please use the Map interface
for new implementatio
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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