Do not use the scanner class or any other user input request. You application should be self-contained and run without user input. Assignment Objectives Practice on implementing inheritance in Java FootballPlayer will extend a new class, Person Overriding methods toString( ) (Links to an external site.) which is a method from the Object class, will be implemented in OffensiveLine, FootballPlayer, Person and Height Keep working with more complex classes in the same way that FootballPlayer had a class as an attribute (Height height), OffensiveLine will have FootballPlayer as an attribute O.O. Requirements One class, one file. Don't create multiple classes in the same .java file Don't use static variables and methods Encapsulation: make sure you protect your class variables and provide access to them through get and set methods All the classes are required to have a constructor that receives all the attributes as parameters and update the attributes accordingly All the classes are required to have an "empty" constructor that receives no parameters but updates all the attributes as needed Follow Horstmann's Java Language Coding Guidelines Organized in packages (MVC - Model - View Controller) Contents Create a Netbeans project (or keep developing from your previous lab) with <default package> App.java Model Model.java FootballPlayer.java Height.java Person.java OffensiveLine.java Functionality The application App creates a Model object The Model class creates 3 FootballPlayer objects creates an OffensiveLine object using the 3 FootballPlayer objects displays information about the OffensiveLine object and its 3 players it is a requirement that this should be done using the toString( ) method in OffensiveLine, which will use toString( ) in FootballPlayer displays the average height of the OffensiveLine this will be done using the averageHeight in the OffensiveLine The classes App it has the main method which is the method that Java looks for and runs to start any application it creates an object (an instance) of the Model class Model this is the class where all the action is going to happen it creates three football players it creates an OffensiveLine object using the three players displays information about the OffensiveLine this has to be done using the OffensiveLine object this is really information about its 3 players the format is free as long as it contains all the information about each of the 3 players displays the average height of the OffensiveLine this has to be done using the OffensiveLine object this has to call the averageHeight method in OffensiveLine Person has the following attributes String name; Height height; int weight; String hometown; String highSchool; and a method String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about this class attributes as a String encapsulation if you want other classes in the same package yo have access to the attributes, you need to make them protected instead of private. see more here. FootballPlayer has the following attributes int number; String position; and a method String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about this class attributes as a String Height it is a class (or type) which is used in Person defining the type of the attribute height it has two attributes int feet; int inches and a method String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about this class attributes as a String it returns a formatted string with feet and inches for instance: 5'2" OffensiveLine has the following attributes FootballPlayer center; FootballPlayer offensiveGuard; FootballPlayer offensiveTackle; They might also be stored in an ArrayList and two methods String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about the 3 players attributes as a String int averageHeight() calculates and returns the average height of the OffensiveLine. it is calculated based on the height of each of its players

Do not use the scanner class or any other user input request. You application should be self-contained and run without user input. Assignment Objectives Practice on implementing inheritance in Java FootballPlayer will extend a new class, Person Overriding methods toString( ) (Links to an external site.) which is a method from the Object class, will be implemented in OffensiveLine, FootballPlayer, Person and Height Keep working with more complex classes in the same way that FootballPlayer had a class as an attribute (Height height), OffensiveLine will have FootballPlayer as an attribute O.O. Requirements One class, one file. Don't create multiple classes in the same .java file Don't use static variables and methods Encapsulation: make sure you protect your class variables and provide access to them through get and set methods All the classes are required to have a constructor that receives all the attributes as parameters and update the attributes accordingly All the classes are required to have an "empty" constructor that receives no parameters but updates all the attributes as needed Follow Horstmann's Java Language Coding Guidelines Organized in packages (MVC - Model - View Controller) Contents Create a Netbeans project (or keep developing from your previous lab) with <default package> App.java Model Model.java FootballPlayer.java Height.java Person.java OffensiveLine.java Functionality The application App creates a Model object The Model class creates 3 FootballPlayer objects creates an OffensiveLine object using the 3 FootballPlayer objects displays information about the OffensiveLine object and its 3 players it is a requirement that this should be done using the toString( ) method in OffensiveLine, which will use toString( ) in FootballPlayer displays the average height of the OffensiveLine this will be done using the averageHeight in the OffensiveLine The classes App it has the main method which is the method that Java looks for and runs to start any application it creates an object (an instance) of the Model class Model this is the class where all the action is going to happen it creates three football players it creates an OffensiveLine object using the three players displays information about the OffensiveLine this has to be done using the OffensiveLine object this is really information about its 3 players the format is free as long as it contains all the information about each of the 3 players displays the average height of the OffensiveLine this has to be done using the OffensiveLine object this has to call the averageHeight method in OffensiveLine Person has the following attributes String name; Height height; int weight; String hometown; String highSchool; and a method String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about this class attributes as a String encapsulation if you want other classes in the same package yo have access to the attributes, you need to make them protected instead of private. see more here. FootballPlayer has the following attributes int number; String position; and a method String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about this class attributes as a String Height it is a class (or type) which is used in Person defining the type of the attribute height it has two attributes int feet; int inches and a method String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about this class attributes as a String it returns a formatted string with feet and inches for instance: 5'2" OffensiveLine has the following attributes FootballPlayer center; FootballPlayer offensiveGuard; FootballPlayer offensiveTackle; They might also be stored in an ArrayList and two methods String toString( ) toString( ) overrides the superclass Object toString( ) method toString( ) returns information about the 3 players attributes as a String int averageHeight() calculates and returns the average height of the OffensiveLine. it is calculated based on the height of each of its players

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Assignment Objectives

Practice on implementing inheritance in Java
- FootballPlayer will extend a new class, Person
Overriding methods
- toString( ) (Links to an external site.) which is a method from the Object class, will be implemented in OffensiveLine, FootballPlayer, Person and Height
Keep working with more complex classes
- in the same way that FootballPlayer had a class as an attribute (Height height), OffensiveLine will have FootballPlayer as an attribute

O.O. Requirements

One class, one file. Don't create multiple classes in the same .java file
Don't use static variables and methods
Encapsulation: make sure you protect your class variables and provide access to them through get and set methods
All the classes are required to have a constructor that receives all the attributes as parameters and update the attributes accordingly
All the classes are required to have an "empty" constructor that receives no parameters but updates all the attributes as needed
Follow Horstmann's Java Language Coding Guidelines
Organized in packages (MVC - Model - View Controller)

Create a Netbeans project (or keep developing from your previous lab) with
- <default package>
  - App.java
- Model
  - Model.java
  - FootballPlayer.java
  - Height.java
  - Person.java
  - OffensiveLine.java

Functionality

The application App creates a Model object
The Model class
- creates 3 FootballPlayer objects
- creates an OffensiveLine object using the 3 FootballPlayer objects
- displays information about the OffensiveLine object and its 3 players
  - it is a requirement that this should be done using the toString( ) method in OffensiveLine, which will use toString( ) in FootballPlayer
- displays the average height of the OffensiveLine
  - this will be done using the averageHeight in the OffensiveLine

The classes

App
- it has the main method which is the method that Java looks for and runs to start any application
- it creates an object (an instance) of the Model class
Model
- this is the class where all the action is going to happen
- it creates three football players
- it creates an OffensiveLine object using the three players
- displays information about the OffensiveLine
  - this has to be done using the OffensiveLine object
  - this is really information about its 3 players
  - the format is free as long as it contains all the information about each of the 3 players
- displays the average height of the OffensiveLine

Person
- has the following attributes
  - String name;
  - Height height;
  - int weight;
  - String hometown;
  - String highSchool;
- and a method
  - String toString( )
  - toString( ) overrides the superclass Object toString( ) method
  - toString( ) returns information about this class attributes as a String
- encapsulation
  - if you want other classes in the same package yo have access to the attributes, you need to make them protected instead of private.
  - see more here.

FootballPlayer
- has the following attributes
  - int number;
  - String position;
- and a method
  - String toString( )
  - toString( ) overrides the superclass Object toString( ) method
  - toString( ) returns information about this class attributes as a String

Height
- it is a class (or type) which is used in Person defining the type of the attribute height
- it has two attributes
  - int feet;
  - int inches
- and a method
  - String toString( )
  - toString( ) overrides the superclass Object toString( ) method
  - toString( ) returns information about this class attributes as a String
  - it returns a formatted string with feet and inches
    - for instance: 5'2"
OffensiveLine
- has the following attributes
  - FootballPlayer center;
  - FootballPlayer offensiveGuard;
  - FootballPlayer offensiveTackle;
  - They might also be stored in an ArrayList
- and two methods
  - String toString( )
    - toString( ) overrides the superclass Object toString( ) method
    - toString( ) returns information about the 3 players attributes as a String
  - int averageHeight()
    - calculates and returns the average height of the OffensiveLine.
    - it is calculated based on the height of each of its players

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