- Making http requests using okhttp
- scheduleAtFixedRate (Timer)
- setRequestProperty (URLConnection)
- getSharedPreferences (Context)
- Connection (java.sql)
A connection represents a link from a Java application to a database. All SQL
statements and results
- LinkedHashMap (java.util)
LinkedHashMap is an implementation of Map that guarantees iteration order. All
optional operations a
- TimerTask (java.util)
The TimerTask class represents a task to run at a specified time. The task may
be run once or repeat
- Vector (java.util)
Vector is an implementation of List, backed by an array and synchronized. All
optional operations in
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- Collectors (java.util.stream)
- Best IntelliJ plugins