SWEN20003
Object Oriented Software Development
Revision - 1
Bach Le
bach.le@unimelb.edu.au
University of Melbourne
© University of Melbourne 2023
Bach Le SWEN20003 © University of Melbourne 2023 1 / 12
Topics Covered So Far
Subject Introduction
A Quick Tour of Java (Java Introduction)
Classes and Objects
Software Tools and Bagel
Arrays and Strings
Input and Output
Inheritance and Polymorphism
Interfaces and Polymorphism
Bach Le SWEN20003 © University of Melbourne 2023 2 / 12
Lecture Objectives
Respond to any mid-semester test related questions
Review the subject learning outcomes so far
Bach Le SWEN20003 © University of Melbourne 2023 3 / 12
Mid-semester Test
This information is the same as what was given in the announcement on Canvas a
few weeks ago.
Will be a 40-minute test, which includes multiple choice and short answer
questions, administered via the Canvas Quiz facility.
The test has been designed to test your knowledge on the contents taught up
to end of week 6, as we would test it in a non-online setting (under normal
exam conditions), so you are expected to know the content without having to
look up subject material or external resources during the exam.
Bach Le SWEN20003 © University of Melbourne 2023 4 / 12
Mid-semester Test
Cont...
Recognizing the practical constraints in imposing exam conditions in the
online context, to be fair to everybody, we have decided to make the exam
open-resources (which means you are allowed to look up anything including
searching the Internet), but if you do not understand/revise the material and
choose to rely on referring to material during the exam, most probably you
will run out of time to complete the exam, because the timing is set
assuming you do not have to spend time referring to material.
Even if you refer to material from other sources, you are not allowed do
directly copy anything including from subject material – the answers must be
your own.
A practice mid-semester exam will be available.
Bach Le SWEN20003 © University of Melbourne 2023 5 / 12
A Quick Tour of Java
Learning Outcomes:
Identify some of the key Java features
Understand the following in context of Java:
▶ Identifiers, Data Types, Variables and Constants
▶ Operators and Expressions
▶ Flow of control
Write simple Java programs
Bach Le SWEN20003 © University of Melbourne 2023 6 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Classes and Objects
Learning Outcomes:
Explain the difference between a class and an object
Define classes, and give them properties and behaviours
Implement and use classes
Identify a series of well-defined classes from a specification
Explain object oriented concepts: abstraction, encapsulation, information
hiding and delegation
Understand the role of Wrapper classes
Bach Le SWEN20003 © University of Melbourne 2023 7 / 12
Software Tools and Bagel
Learning Outcomes:
Use git for software version control
Use Maven to manage software builds
Use the IntelliJ Debugger to find program bugs
Use the software package Bagel (Basic Academic Graphical Engine Library)
Contribute to Open Source Software (OSS) projects
Bach Le SWEN20003 © University of Melbourne 2023 8 / 12
Arrays and Strings
Learning Outcomes:
Understand how to use Arrays
Understand how to use Strings
Bach Le SWEN20003 © University of Melbourne 2023 9 / 12
Input and Output
Learning Outcomes:
Accept input to your programs through:
▶ Command line arguments
▶ User input
▶ Files
Write output from your programs through:
▶ Standard output (terminal)
▶ Files
Use files to store and retrieve data during program execution
Manipulate data in files (i.e. for computation)
Bach Le SWEN20003 © University of Melbourne 2023 10 / 12
Inheritance and Polymorphism
Learning Outcomes:
Use inheritance to abstract common properties of classes
Explain the relationship between a superclass and a subclass
Make better use of privacy and information hiding
Identify errors caused by shadowing and privacy leaks, and avoid them
Describe and use method overriding
Describe the Object class, and the properties inherited from it
Describe what upcasting and downcasting are, and when they would be
used
Explain polymorphism, and how it is used in Java
Describe the purpose and meaning of an abstract class
Bach Le SWEN20003 © University of Melbourne 2023 11 / 12
Interfaces and Polymorphism
Learning Outcomes:
Describe the purpose and use of an interface
Describe what it means for a class to use an interface
Describe when it is appropriate to use inheritance vs. interfaces
Use interfaces and inheritance to achieve powerful abstractions
Make any class “sortable”
Bach Le SWEN20003 © University of Melbourne 2023 12 / 12