new operator and a constructor. The new operator returns a reference to the object that was created. You can assign the reference to a variable or use it directly.
A class controls access to its instance variables and methods by using the
Java platform's access mechanism. Instance variables and methods that are
accessible to code outside of the class that they are declared in can be
referred to by using a qualified name. The qualified name of an instance
variable looks like this:
objectReference.variableName
The qualified name of a method looks like this:
objectReference.methodName(argumentList)
or
objectReference.methodName()
The garbage collector automatically cleans up unused objects. An object is
unused if the program holds no more references to it. You can explicitly drop
a reference by setting the variable holding the reference to null.