CSC 143/Chapter 8

Chapter 8: Object Oriented Programming (Review)

Chapter 8 Summary

Chapter 8 concepts:

• Object oriented programming (classes and objects)
• Object state (fields) and behavior (methods); accessors
• Object initialization (constructors)
• Encapsulation (private fields)
• Case study: Stock class

Chapter 8 Homework

HW Questions

(Recommended) Self-check problems: #7, #10, #15, #18, #21, #26

(Required) Exercises: #3, #4, #5, #6, #14, #15, #16

(Required) Projects: (none)

HW Details

Self-check:

• 7 - create Name class, first/middle/last
• 10 - distance method to Point object
• 15 - tSoString method to Name class
• 18 - constructor problems
• 21 - constructor to Point class accepting Point
• 26 - encapsulate Name class

Exercises:

• 3 - add manhattanDistance() method to Point class
• 4 - add isVertical() method to Point class
• 5 - add slope() method to Point class
• 6 - add isCollinear() method to Point class
• 14 - Line class between two points, implement specified constructors and methods
• 15 - add getSlope() method to Line class
• 16 - add Line constructor

Projects:

• none

Chapter 8 Code

Lecture Code

We have a simple object-oriented hello world program implemented in the 00_HelloWorld folder in the Github repository.

Worksheet Code

Polynomials:

• In this assignment, you'll implement a Polynomial object and use it in a PolynomialDriver class
• You should plan out your data structure for a polynomial object (what fields are necessary?)
• You should design your class to implement methods as specified in assignment:
• Implement 3 methods:
  • Add one polynomial to another, and return a new Polynomial object as the result (returns a Polynomial)
  • Evaluate the polynomial at a particular location x (returns a double)
  • Add a toString() method that will print out the polynomial like 5.0 x^2 + 1.123 x + 17.9

Polynomial Driver:

• Adding:
  • Create the polynomial 4 x^3 + x^2 + 4 x + 1
  • Create the polynomial x^2 + 2x + 1
  • Add these two polynomials to get result 4 x^3 + 2 x^2 + 6 x + 2
  • Print the result
• Evaluating:
  • Create the polynomial

Extra credit:

• Implement subtraction method that utilizes the add method (+2)
• Implement root-finding method for polynomials with degree < 3 (+5)
• Implement root-finding method for polynomials with arbitrary degree (+10)

Chapter 8 Goodies

Puzzle 1

Java encoded with Caesar cipher

Puzzles/Crypto Level 2/Puzzle 1

Profiles

James Gosling

• Inventor of Java