Welcome to the OOP course page of Thijmen. Here I explain a bit more, and I hope easier how java works and what you need to know for your exam at the Radboud University. First things first, disclaimers and sources: I am not a Object Orientated Programming TA, nor am I a OOP teacher. I do not know everything about OOP so if you have questions, there is a valid chance I don’t know the answer as well. You can use chatGPT for smaller questions, or if your uncertain, ask a TA/Teacher. That should be your main source of information. You should only use this as additional material next to the material Radboud provides you.

Sources: For started I of course used the slides and recording provided by the Radboud. Because I don’t think I’m allowed to publish these. You can find your slides in Brightspace. I mainly used the slides/recordings of 2023-2024, since that’s my cohort. But was able to here and there edit and adjust to 2024-2025 class.

I might have done a live session with one or more people about OOP. That is highly recommended to attend. Not only will I discuss all things below. I will also perform some live coding with feedback. If you want to attend the live session, please fill out this registration form.

Not that anyone is going to read that… but at least you now can’t say: “I got something on the test that you didn’t cover” or “That looks a lot like Radboud material”

Course overview:

Lesson 1 – Introduction
Lesson 2 – …

Lesson 1 – Introduction

Video

[VIDEO LINK HERE]

Learning goals

• Write, compile and execute a Java program (in Visual Studio Code) (See my setup guide here)
• Define classes with fields and methods;
• Distinguish static and dynamic methods;
• Define objects as instances of such a class;
• Use Java arrays;
• Use rudimentary Java input/output (Scanner);
• Define and use a toString() method for user-defined classes;
• Concentrate all input/output in a single class.

Quiz

OOP – Lesson 1

The first OOP quiz

1 / 7

Say we have a keyboard. What is keyboard for a thing?

An object

An state

2 / 7

Select two states of the object keyboard.

The keyboard has keys

The keyboard is made out of iron

The keyboard is an object

The keyboard is a class in java

3 / 7

Now we established what the keyboard is and what its states are.

Select all snippets that make the correct code.

public class keyboard () { …

public class keyboard { …

boolean hasKeys

boolean hasKeys;

boolean isIron;

boolean material = Iron;

}

4 / 7

Given the code:
public class exercise1 { public static void main(String[] args) { System.out.println("Hello world"); } }

What is the Object?

exercise1

main

System.out.println("Hello world")

None of the above

5 / 7

Given the code:

public class exercise1 {    public static void main(String[] args) {        System.out.println("Hello world");    }} What is are the methods?

exercise1

main

System.out.println("Hello world!");

None of the above

6 / 7

Given the code:
public class exercise1 { public static void main(String[] args) { System.out.println("Hello world"); } }
What is are the states?

exercise1

main

System.out.println("Hello world!");

None of the above!

7 / 7

Select all allowed ways to create an array in Java

double[] array = new double[3] { 3.3, 15.8, 9.7 };

int[] array = new double[3];

int SIZE = 500;
int[] array = new int[SIZE];

double[] array = new int[999] = {1, 2, 3};

double[] array = new double[3] = {1, 2, 3};

int[] array = new int[999];

double array = {1, 2, 3};

className[] array = {new className(), new className(). new className()};

Your score is

The average score is 77%

Assignment/appendices

Referenced links talked about in the video:

Extensions on VSCode

Assignment 1

Click here to download the assignment

Slides

Click here to download the slides

Answers

Click here to download the answers to the assignment. Note that there might be multiple different answers. If you want, I can take a look at it. Note that you might not get an answer from me, because I’m too busy. If you have a really important question. I suggest using the contact form.

Submit Assignment for manual feedback (no guarantee for response)

Lesson 2 – …

Video

[VIDEO LINK HERE]

Summary

Quiz

Assignment/appendices

Assignment 1

Click here to download the assignment

Slides

Click here to download the slides

Answers

Submit Assignment for manual feedback (no guarantee for response)

Loved it?

Did you enjoy the course? And were you able to learn anything? Feel free to buy me a beer :). Hosting this website, setting up the course including recording and creating exercises and setting up the website was quite some work. I started this project around December 1 2024. If you’re interested in leaving a donation, please check out the donation page.

OOP (english)