Wedding details Program plan: Filename: “Person.java” Define the “Person” class Declare the member variables. Define the constructor Set the values. Define the “getFirstName” method Return the first name Define the “getLastName” method Return the last name Define the “getBirthDate” method Return the birth day Filename: “Couple.java” Define the “Couple” class Declare the member variables. Define the constructor Set the values. Define the “getFirstPerson” method Return the first person name Define the “getSecondPerson” method Return the second person name Filename: “Wedding.java” Define the “Wedding” class Declare the member variables. Define the constructor Set the values. Define the “getWeddingDate” method Return the wedding date Define the “getCouple” method Return the couple Define the “getLocation” method Return the location Filename: “TestWedding.java” Define the “TestWedding” class Declare the variable for “SimpleDateFormat”. Create the objects for “Person” class Display the wedding details. Define the main method Create the objects for “Person” class Create an object for “Couple” class Create an object for “Wedding” class Call the “displayWedding” method with an argument Create the objects for “Person” class Create an object for “Couple” class Create an object for “Wedding” class Call the “displayWedding” method with an argument.

Question

If a UDP datagram is sent from host A, port P to host B, port Q, but at host B there is no process listening to port Q, then B is to send back an ICMP Port Unreachable message to A. Like all ICMP messages, this is addressed to A as a whole, not to port P on A. (a) Give an example of when an application might want to receive such ICMP messages. (b) Find out what an application has to do, on the operating system of your choice, to receive such messages. (c) Why might it not be a good idea to send such messages directly back to the originating port P on A?

Answer 1

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Chapter 4, Problem 11PE

Program Plan Intro

Wedding details

Program plan:

Filename: “Person.java”

Define the “Person” class

Declare the member variables.

Define the constructor

Set the values.

Define the “getFirstName” method

Return the first name

Define the “getLastName” method

Return the last name

Define the “getBirthDate” method

Return the birth day

Filename: “Couple.java”

Define the “Couple” class

Declare the member variables.

Define the constructor

Set the values.

Define the “getFirstPerson” method

Return the first person name

Define the “getSecondPerson” method

Return the second person name

Filename: “Wedding.java”

Define the “Wedding” class

Declare the member variables.

Define the constructor

Set the values.

Define the “getWeddingDate” method

Return the wedding date

Define the “getCouple” method

Return the couple

Define the “getLocation” method

Return the location

Filename: “TestWedding.java”

Define the “TestWedding” class

Declare the variable for “SimpleDateFormat”.

Create the objects for “Person” class

Display the wedding details.

Define the main method

Create the objects for “Person” class

Create an object for “Couple” class

Create an object for “Wedding” class

Call the “displayWedding” method with an argument

Create the objects for “Person” class

Create an object for “Couple” class

Create an object for “Wedding” class

Call the “displayWedding” method with an argument.

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