- Running tasks concurrently on multiple threads
- getSystemService (Context)
- addToBackStack (FragmentTransaction)
- scheduleAtFixedRate (Timer)
- IOException (java.io)
Signals a general, I/O-related error. Error details may be specified when
calling the constructor, a
- Set (java.util)
A Set is a data structure which does not allow duplicate elements.
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- Collectors (java.util.stream)
- StringUtils (org.apache.commons.lang)
Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
- Filter (javax.servlet)
A filter is an object that performs filtering tasks on either the request to a
resource (a servlet o
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