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Constructors
A
constructor is used in the creation of an object that is an instance
of a class. Typically it performs operations required to initialize the class
before methods are invoked or fields are accessed. Constructors are never
inherited.
Similar to methods, reflection provides APIs to discover and retrieve the
constructors of a class and obtain declaration information such as the
modifiers, parameters, annotations, and thrown exceptions. New instances of
classes may also be created using a specified constructor. The key classes
used when working with constructors are
Class
and
java.lang.reflect.Constructor. Common operations involving constructors are covered in the following
sections:
