# SC2002 OOP Tutorial
## Tutorial 1

### Qn 1: Class, Object, Attribute or Behaviour?
| Name | Category |
|:-------------- |:---------------------------------------------------------------------------- |
| Student | Class |
| NTU | Object |
| Book | Class |
| MichaelJackson | Object |
| Age | Attribute |
| Color | Class |
| Work | Behaviour? |
| Person | Class |
| Result | Depends, in this context probably attribute |
| Transformer | Idk what they mean here, could the `.map()` transformer which is a Behaviour |
| Engine | Class |
| Liquid | Class |
| Force | Class |
| Shoot | Behaviour |

### Qn 2: Model a school

public class School {
    private final String name;
    private final int established;
    private final ArrayList<AcademicStaff> acadStaff;
    private final ArrayList<Student> students;
    private final ArrayList<Course> courses;
}

### Qn 3: Transpile C to Java

import java.util.Arrays;
import java.util.Scanner;

public class Tutorial1 {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        System.out.println("Enter number of Integer elements to be sorted:");
        int[] buf = new int[s.nextInt()];
        for (int i = 0; i < buf.length; ++i) {
            System.out.println("Enter integer value for element no." + (i + 1) + ":");
            buf[i] = s.nextInt();
        }
        bubble(buf);
        System.out.println(Arrays.toString(buf));
    }

    public static void bubble(int[] buf) {
        for (int i = buf.length - 2, temp; i >= 0; --i) {
            for (int j = 0; j <= i; ++j) {
                if (buf[j] > buf[j + 1]) {
                    temp = buf[j];
                    buf[j] = buf[j + 1];
                    buf[j + 1] = temp;
                }
            }
        }
    }
}

## Tutorial 2
### Qn1. Write a class Circle that has the following instance variables and methods:

// Circle.java
public class Circle {
    private double radius;
    private static final double PI = 3.14159;

    public Circle(double radius) { this.radius = radius; }
    public void setRadius(double radius) { this.radius = radius; }
    public double getRadius() { return radius; }
    public double area() { return (this.radius * this.radius) * Circle.PI; }
    public double circumference() { return Circle.PI * 2 * this.radius; }

    public void printArea() {
        System.out.println("Area: " + this.area());
    }

    public void printCircumference() {
        System.out.println("Circumference: " + this.circumference());
    }
}

// CircleApp.java
import java.util.Scanner;

public class CircleApp {
    public static void main(String[] args) {
        System.out.println("==== Circle Computation ====");
        System.out.println("|1. Create a new circle    |");
        System.out.println("|2. Print Area             |");
        System.out.println("|3. Print Circumference    |");
        System.out.println("|4. Quit                   |");
        System.out.println("============================");
        Scanner s = new Scanner(System.in);
        Circle c = null;

        loop: while (true) {
            System.out.println("Choose option (1-3)");

            switch (s.nextInt()) {
                case 1:
                    System.out.println("Enter the radius to compute the area and circumference");
                    c = new Circle(s.nextInt());
                    break;
                case 2:
                    if(c == null) {
                        System.out.println("No circle created! Choose option 1");
                        continue;
                    }
                    c.printArea();
                    break;
                case 3:
                    if(c == null) {
                        System.out.println("No circle created! Choose option 1");
                        continue;
                    }
                    c.printCircumference();
                    break;
                default:
                    System.out.println("Thank you!!");
                    break loop;
            }
        }
    }
}

## Qn2: Write a class Dice that has the following instance variables and methods:

// Dice.java
public class Dice {
    private int valueOfDice;

    public Dice(int valueOfDice) {
        this.valueOfDice = valueOfDice;
    }

    public int getValueOfDice() {
        return valueOfDice;
    }

    public void setValueOfDice(int valueOfDice) {
        this.valueOfDice = valueOfDice;
    }

    public void printDiceValue() {
        System.out.println("Dice value: " + this.valueOfDice);
    }
}

// DiceApp.java
import java.util.Random;
import java.util.Scanner;

public class DiceApp {
    public static void main(String[] args) {
        Random r = new Random();
        Scanner s = new Scanner(System.in);
        Dice d1 = new Dice(r.nextInt(Integer.MAX_VALUE)), d2 = new Dice(r.nextInt(Integer.MAX_VALUE));

        System.out.println("Press <key> to roll first dice");
        s.nextInt();
        System.out.println("Current Value is: " + d1.getValueOfDice());

        System.out.println("Press <key> to roll second dice");
        s.nextInt();
        System.out.println("Current Value is: " + d2.getValueOfDice());

        long total = d1.getValueOfDice() + d2.getValueOfDice();
        System.out.println("Your total number is: " + total);
    }
}