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create an application class named letterdemo that instantiates objects of two classes named letter and certifiedletter and that demonstrates all their methods. the classes are used by a company to keep track of letters they mail to clients. the letter class includes auto-implemented properties for the name of the recipient and the date mailed (stored as strings).

Sagot :

JunRRidn

You use the final keyword in a method declaration to indicate that the method cannot be overridden by subclasses. The Object class does this—a number of its methods are final .

What is object explain the class?

  • In computer programming, the object class refers to a class created to group various objects which are instances of that class. Classes are code templates for creating objects. In cases where objects need to be grouped in a certain way, an object class is the "container" for a set of objects built on these templates.
  • The following code is written in Java. It creates the three classes as requested with the correct constructors, and getter/setter methods. Then the test class asks the user for all the information and creates the customer object, finally printing out that information from the object getter methods.
  • Everything in Java is associated with classes and objects, along with its attributes and methods. For example: in real life, a car is an object. The car has attributes, such as weight and color, and methods, such as drive and brake. A Class is like an object constructor, or a "blueprint" for creating objects.

class Letter:

header="Dear "

footer="Sincerely, \n"

text=""

def __init__(self,letterFrom,letterTo):

self.header+=letterTo + ":\n\n"

self.footer+=letterFrom + "\n"

def getText(self):

return self.header+self.text+self.footer

def addLine(self,line):

self.text+=line+"\n\n"

l = Letter("Cain", "Abel")

l.addLine("I am very happy to be writing to you at this joyful moment of my life.")

I.addLine("I am really sorry i killed you, I was a saddist back then.")

print(l.getText())

To learn more about object refer to:

https://brainly.com/question/11842604

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