Author Archives: Mr. M

Bank Runner Class

Bank Class

This is a modified version of this bank assignment

The responsibilities of this class are to

manage an Array of Accounts that could be any kind of account
add an Account (of any type)
remove an account by
- account id
- owner (a Person object)

Methods
- Person[] topAccountOwners(int number )
  - this method returns the top number owners with the greatest amount of cash in 1 account
- ** boolean binarySearch( int accountNumber) // this method should implement the binary search algorithm to determine if the account acct exists . Note for binary search to work, what must be true?
- ** extra credit Account[] sortByAccountId()
  - this method returns an array of Accounts sorted by amount in the account

Bank Account Inheritance Assignment

Person Class

This page is an edited version of this (old) assignment

Constructor

public Person( String _name, int _age)

instance Variables

private String name
private int age

Methods

public String getName()
public boolean equals(Person other) // assume that two objects with same age and name are equal

Account – Super Class

Static Variable(s)

static private int nextAccountNum

Constructor

public Account( double_balance, Person _owner)

instance Variables

private int accountNumber
protected double balance
protected Person[] owners

Methods

public int getAccountNumber()
public void deposit(double amount)
public double getCurrentBalance()
public boolean withdraw(double amount); // returns false if amount > this.balance
public boolean equals(Account other)
public String toString()
public void addOwner(Person p)
public void removeOwner( Person p)
public Person[] getOwners()

CheckingAccount extends Account

instance Variables
- private int checksWritten
Acessors and Mutators
- void writeCheck( double amount) –> tries to call super.withDraw() as long as the balance is enough and records a new check number

SavingsAccount extends Account

instance variables
- private double interestRate
- double[] dailyBalances
static variables
- public static final int MINIMUM_BALANCE=100; // this is the absolute minimum amount of money that must always be in the account
methods
- public boolean withdraw(double amount) //@override the withdraw() method to ensure that currentBalance the never gets below MINIMUM_BALANCE
- public void recordDailyBalance() // @ record current day’s balance by storing it in dailyBalances

After you have completed this, work on the Bank runner class.

Chapter 9

Great picture of synchronous vs asyncronous

Retrieved from https://msdn.microsoft.com/en-us/library/ms917361.aspx

Problem Solving Process

The problem Solving Process (ch 7.1)

Taken From JB Learning’s super awesome book/powerpoint set “Computer Science Illuminated

http://www.jblearning.com/catalog/9781449672843/

Compiled and Interpreted Languages

Comilers and Interpreters

Retrieved from http://en.wikibooks.org/wiki/Introduction_to_Programming_Languages/Interpreted_Programs

retrieved from http://www.greenteapress.com/thinkapjava/html/thinkjava003.html

retrieved from http://www.pasteur.fr/formation/infobio/python/ch05s02.html

Alice- What as a String

You cannot place a number variable into the say() method

You must use the World function : what as a string

NEXT: asking user for input and saying it

Class Roster Array Version [Java] Assignment

Class Roster: This class will implement the functionality of all roster for school. It will , in essence, manage an Array of Student objects. Each roster will store a default of 10 Students

“global” Instance Variables
- private Student myStudents : an array storing Student Objects
- private String className (a name to represent a given roster like “Ap CS”)
- public int period //during which period of the day does this roster meet
a default constructor should initialize the Array to store 20 strings
a single parameter constructor that takes an Array <String>
Both constructors should initialize the instance variables
Methods
- Accessors
  - private int indexOf(Student st) //@returns index of Student St or -1
  - public boolean containsStudent(Student studentName )/ /@returns true if studentName is in roster .
  - public boolean equals(ClassRoster other) //@ returns whether or not rosters are equal. Rosters are equal if identical students are in identical order in the lists
- Mutators:

boolean addStudent( Student st ) ;//adds the student to the Roster

1	boolean addStudent( Student st ) ;//adds the student to the Roster

public void addStudent(String studentName, int age) ;// adds student name and age to end of roster

. Hint: Make user of the containsStudent() method
public boolean removeStudent(int ssnId ) // removes student from roster based on id. Make sure that you maintain the integrity of the parallel ArrayLists.

public boolean removeStudent(String name) //removes student based on name. Make sure that you maintain the integrity of the parallel ArrayLists.

public boolean removeStudent( Student st) //removes student st. Make sure that you maintain the integrity of the parallel ArrayLists.

Student Runner Part 2

public class StudentsRunner2{

public static void main(String[] args){
//insert the line of code needed to create the Student object aStudent;
String teacher;
for (int i =0 ;i <  5; i++)
  {
   teacher= inputString("Enter a teacher");
   aStudent.addTeacher(teacher);
  }
}


}

public class StudentsRunner2{

public static void main(String[] args){

//insert the line of code needed to create the Student object aStudent;

String teacher;

for (int i =0 ;i < 5; i++)

{

teacher= inputString("Enter a teacher");

aStudent.addTeacher(teacher);

}

1) Construct the Java statement to create the Student object called aStudent in the

StudentsRunner

Back to the Student Class

Students Runner Class

public class StudentsRunner{

public static void main(String[] args){

Student dom;

}


}

public class StudentsRunner{

public static void main(String[] args){

Student dom;

}

1) Construct the Java statement to create the Student object called Dom in the

StudentsRunner

Next to Student Runner Part 2

Back to the Student Class

Student Object (OOP Java)

Student Class

A school district decided to write a program to help keep track of various parts of the school.

It has been decided to store relevant information about Students in a Student class. Each Student will have an array of Strings to store the names of his or her teachers.

private instance variables

public class Student
{
public String name;
private int age
private double gpa;
private //insert array declaration;

public Student(){} // default constructor

boolean setTeacher (String name, int index){
//missing code
}

public void setGpa(double to){
//missing code
}

public double getGPA() // returns gpa


}

public class Student

{

public String name;

private int age

private double gpa;

private //insert array declaration;

public Student(){} // default constructor

boolean setTeacher (String name, int index){

//missing code

}

public void setGpa(double to){

//missing code

}

public double getGPA() // returns gpa

}

Part 1

* Construct the Java statement to declare the array called

teachersNames to store the String names of the student’s teachers

Part 2

write a default constructor
construct a method called addTeacher( String name) that adds String name to the teachersNames array
- to do this let’s create a private method private String[] addStr( String[] input, String val) that adds value to the end of the array and returns it. [redact]Solution[/redact]
construct hasTeacher(String name) that returns true if name is in the teachersName array
construct a method removeTeacher(String name) that removes the String name from the teachersNames array.
construct a method the line of code needed in the setGpa(double to) method of the Student Class.
construct a method boolean setTeacher (String name, int index) . This method should return true if index is valid in the array and false if index >= teachersName.length

Next: The runner class

Mr. M online

Mr. M's Stuff