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ObjectMapper provides functionality for reading and writing JSON, either to and
from basic POJOs (Pl
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Formats and parses dates in a locale-sensitive manner. Formatting turns a Date
into a String, and pa
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ArrayList is an implementation of List, backed by an array. All optional
operations including adding
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Calendar is an abstract base class for converting between a Date object and a
set of integer fields
- HashSet (java.util)
HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
- Stack (java.util)
Stack is a Last-In/First-Out(LIFO) data structure which represents a stack of
objects. It enables u
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