- Running tasks concurrently on multiple threads
- putExtra (Intent)
- getExternalFilesDir (Context)
- addToBackStack (FragmentTransaction)
- GridBagLayout (java.awt)
The GridBagLayout class is a flexible layout manager that aligns components
vertically and horizonta
- FileWriter (java.io)
A specialized Writer that writes to a file in the file system. All write
requests made by calling me
- SecureRandom (java.security)
This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
- SQLException (java.sql)
An exception that indicates a failed JDBC operation. It provides the following
information about pro
- DateFormat (java.text)
Formats or parses dates and times.This class provides factories for obtaining
instances configured f
- Servlet (javax.servlet)
Defines methods that all servlets must implement. A servlet is a small Java
program that runs within
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