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Q1: There are common attributes and methods between passengers and drivers. What is the best choice for designing and writing the codes of these two classes? Explain your answer.

Q1: There are common attributes and methods between passengers and drivers. What is the best choice for designing and writing the codes of these two classes? Explain your answer.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Object oriented programming 

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Overview: National railway company wants to make a simple application to keep track of trips and passengers. In this TMA, it is required to help the company implement the required application. Requirements: After a quick meeting with the employee in charge, you got the following information: • It is required to store the whole data in one collection • Each trip has a number, a driver and a specific date. In addition, passengers could be added or removed within a given limit for the maximum number of passengers who could be in the same trip. Furthermore, there are other attributes (add at least 3 attributes from your choice). Of course, trip number is unique within the same date. • Each driver has a unique ID, a name and other attributes (add at least 2 attributes from your choice). • Each passenger has a unique Civil ID (National ID), a name and other attributes (add at least 2 attributes from your choice but one of them should be common with drivers). Moreover, you have been informed that the following operations happen frequently: • Offering a new trip • Adding a passenger to a specific trip • Removing a passenger from a specific trip • Retrieving the average number of passengers per trip of a specified date • Displaying all available trips in a format similar to the following: date1: tripNo1 tripNo2 tripNo3 ... date2: tripNo1 tripNo2 tripNo3 ... where dates and trips are sorted in ascending order • Saving all the data into a text file Analysis: Q1: There are common attributes and methods between passengers and drivers. What is the best choice for designing and writing the codes of these two classes? Explain your answer. Q2: Draw a simple class diagram showing only relationships between the classes. Implementation: After analysing the given requirements, implement the required application: with Object Oriented Programming style • following the rules of good programming style (e.g. adding comments, etc.)
Transcribed Image Text:Overview: National railway company wants to make a simple application to keep track of trips and passengers. In this TMA, it is required to help the company implement the required application. Requirements: After a quick meeting with the employee in charge, you got the following information: • It is required to store the whole data in one collection • Each trip has a number, a driver and a specific date. In addition, passengers could be added or removed within a given limit for the maximum number of passengers who could be in the same trip. Furthermore, there are other attributes (add at least 3 attributes from your choice). Of course, trip number is unique within the same date. • Each driver has a unique ID, a name and other attributes (add at least 2 attributes from your choice). • Each passenger has a unique Civil ID (National ID), a name and other attributes (add at least 2 attributes from your choice but one of them should be common with drivers). Moreover, you have been informed that the following operations happen frequently: • Offering a new trip • Adding a passenger to a specific trip • Removing a passenger from a specific trip • Retrieving the average number of passengers per trip of a specified date • Displaying all available trips in a format similar to the following: date1: tripNo1 tripNo2 tripNo3 ... date2: tripNo1 tripNo2 tripNo3 ... where dates and trips are sorted in ascending order • Saving all the data into a text file Analysis: Q1: There are common attributes and methods between passengers and drivers. What is the best choice for designing and writing the codes of these two classes? Explain your answer. Q2: Draw a simple class diagram showing only relationships between the classes. Implementation: After analysing the given requirements, implement the required application: with Object Oriented Programming style • following the rules of good programming style (e.g. adding comments, etc.)
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Hints: • For each class, it is required to implement constructors, setters, getters, toString() method, and any other necessary method • If the user tries to do an operation that could violate the state of objects, the operation should be ignored and the application should display an error message (e.g. adding a passenger to the same trip twice, etc.) Checking equality of any 2 objects should be done via the equals() method • • Testing: After implementing the required classes, design and implement a testing class to test them as follows: There is a class that will do the main job of as follows: o It has one collection to store the whole data (all trips) o It has static methods, one for each operation happens frequently o For each adding or removing operation, a message should be displayed to the user to explain the status of the operation (i.e. if it was successful or not) • Create at least 7 trips in at least 3 different dates and add them to the collection that stores the whole data then add and remove some passengers from them. Try to violate the state of the objects and show that your code prevents all violations. Show that the other operations that happen frequently are working fine At the end, the whole data should be saved into a text file and this file should be saved automatically inside the folder contains your Java project • • ●
Transcribed Image Text:Hints: • For each class, it is required to implement constructors, setters, getters, toString() method, and any other necessary method • If the user tries to do an operation that could violate the state of objects, the operation should be ignored and the application should display an error message (e.g. adding a passenger to the same trip twice, etc.) Checking equality of any 2 objects should be done via the equals() method • • Testing: After implementing the required classes, design and implement a testing class to test them as follows: There is a class that will do the main job of as follows: o It has one collection to store the whole data (all trips) o It has static methods, one for each operation happens frequently o For each adding or removing operation, a message should be displayed to the user to explain the status of the operation (i.e. if it was successful or not) • Create at least 7 trips in at least 3 different dates and add them to the collection that stores the whole data then add and remove some passengers from them. Try to violate the state of the objects and show that your code prevents all violations. Show that the other operations that happen frequently are working fine At the end, the whole data should be saved into a text file and this file should be saved automatically inside the folder contains your Java project • • ●
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