- Running tasks concurrently on multiple threads
- findViewById (Activity)
- startActivity (Activity)
- getSharedPreferences (Context)
- Permission (java.security)
Legacy security code; do not use.
- Manifest (java.util.jar)
The Manifest class is used to obtain attribute information for a JarFile and its
entries.
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- ServletException (javax.servlet)
Defines a general exception a servlet can throw when it encounters difficulty.
- HttpServletRequest (javax.servlet.http)
Extends the javax.servlet.ServletRequest interface to provide request
information for HTTP servlets.
- BoxLayout (javax.swing)
- Top 12 Jupyter Notebook extensions