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ObjectMapper provides functionality for reading and writing JSON, either to and
from basic POJOs (Pl
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An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
- Date (java.util)
A specific moment in time, with millisecond precision. Values typically come
from System#currentTime
- Map (java.util)
A Map is a data structure consisting of a set of keys and values in which each
key is mapped to a si
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A Set is a data structure which does not allow duplicate elements.
- TreeSet (java.util)
TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
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