chore: add homeworks

src/main/java/me/alex4386/gachon/sw14462/Main.java

@@ -5,7 +5,7 @@
 import java.util.*;
 
 public class Main {
-    public static String currentTarget = "day10";
+    public static String currentTarget = "day11";
     public static boolean fallbackToLatest = true;
 
     public static Map<String, Class<?>> getAvailableTargetClassNames() {

src/main/java/me/alex4386/gachon/sw14462/day11/Main.java

@@ -0,0 +1,18 @@
+package me.alex4386.gachon.sw14462.day11;
+
+import me.alex4386.gachon.sw14462.utils.Chainloader;
+
+public class Main {
+    public static String chainloadTarget = "ex6_7";
+
+    public static void main(String[] args) throws Throwable {
+        String packageName = Main.class.getPackage().getName();
+        String chainLoadTargetClass = packageName + "." + chainloadTarget + ".Main";
+
+        try {
+            Chainloader.chainloadTarget(chainLoadTargetClass, args);
+        } catch (Exception e) {
+            throw e;
+        }
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_2a/Main.java

@@ -0,0 +1,18 @@
+package me.alex4386.gachon.sw14462.day11.ex6_2a;
+
+public class Main {
+    public static void main(String args[]) {
+        Suit cardSuit = Suit.SPADES;
+        System.out.println("cardSuit = Suit.SPADES");
+
+        System.out.println("cardSuit.ordinal() = " + cardSuit.ordinal());
+        System.out.println("cardSuit.equals(Suit.CLUBS) = " + cardSuit.equals(Suit.CLUBS));
+        System.out.println("cardSuit.compareTo(Suit.CLUBS) = " + cardSuit.compareTo(Suit.CLUBS));
+
+        System.out.println("Suit.valueOf(\"CLUBS\") = " + Suit.valueOf("CLUBS"));
+        System.out.println("Suit.valueOf(cardSuit.toString()) = " + Suit.valueOf(cardSuit.toString()));
+
+        System.out.println("cardSuit.getColor() = " + cardSuit.getColor());
+        System.out.println("cardSuit.toString() = " + cardSuit.toString());
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_2a/Suit.java

@@ -0,0 +1,15 @@
+package me.alex4386.gachon.sw14462.day11.ex6_2a;
+
+public enum Suit {
+    CLUBS("black"), DIAMONDS("red"),  HEARTS("red"), SPADES("black");
+
+    private final String color;
+
+    private Suit(String suitColor) {
+        this.color = suitColor;
+    }
+
+    public String getColor() {
+        return this.color;
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_2b/Main.java

@@ -0,0 +1,7 @@
+package me.alex4386.gachon.sw14462.day11.ex6_2b;
+
+public class Main {
+    public static void main(String[] args) {
+        TimeTest.main(args);
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_2b/Time.java

@@ -0,0 +1,57 @@
+package me.alex4386.gachon.sw14462.day11.ex6_2b;
+
+public class Time {
+    private int hours;
+    private int minute;
+
+    public Time() {
+        this(0,0);
+    }
+
+    public Time(int hours, int minute) {
+        if (Time.isValid(hours, minute)) {
+            this.hours = hours;
+            this.minute = minute;
+        } else {
+            throw new IllegalArgumentException("Invalid time");
+        }
+    }
+
+    public Time(int hours, int minute, boolean isPM) throws IllegalArgumentException {
+        this(hours + (isPM ? 12 : 0), minute);
+    }
+
+    public static boolean isValid(int hours, int minute) {
+        return (hours >= 0 && hours <= 23) &&
+                (minute >= 0 && minute <= 59);
+    }
+
+    public String getTime24() {
+        return String.format("%02d%02d", this.hours, this.minute);
+    }
+
+    public String getTime12() {
+        return String.format("%d:%02d %s", this.hours % 12, this.minute, this.hours >= 12 ? "PM" : "AM");
+    }
+
+    public void setTime(int hours, int minute) {
+        if (Time.isValid(hours, minute)) {
+            this.hours = hours;
+            this.minute = minute;
+        } else {
+            throw new IllegalArgumentException("Invalid time");
+        }
+    }
+
+    public void setTime2(int hours, int minute, boolean isPM) {
+        // seems not intended when PM=true and hours=12,
+        // but it's not mentioned in the requirement
+        int hours24 = hours + (isPM ? 12 : 0);
+        this.setTime(hours24, minute);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%02d:%02d", this.hours, this.minute);
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_2b/TimeTest.java

@@ -0,0 +1,38 @@
+package me.alex4386.gachon.sw14462.day11.ex6_2b;
+
+public class TimeTest {
+    public static void main(String[] args) {
+        System.out.println("Test scenario 1: valid time (12:49)");
+        boolean result = Time.isValid(12, 49);
+        System.out.println("Expected: true");
+        System.out.println("Actual: " + result);
+
+        System.out.println("Test scenario 2: invalid time (24:00)");
+        result = Time.isValid(24, 0);
+        System.out.println("Expected: false");
+        System.out.println("Actual: " + result);
+
+        System.out.println("Test scenario 3: invalid time (12:60)");
+        result = Time.isValid(12, 60);
+        System.out.println("Expected: false");
+        System.out.println("Actual: " + result);
+
+        System.out.println("Test scenario 4: Initialize Time to (05:49)");
+        Time time = new Time(5, 49);
+        System.out.println("Expected: 05:49");
+        System.out.println("Actual: " + time.toString());
+
+        System.out.println("Test scenario 5: Initialize Time with alternative constructor to 05:49 PM (17:49)");
+        time = new Time(5, 49, true);
+        System.out.println("Expected: 17:49");
+        System.out.println("Actual: " + time.toString());
+
+        System.out.println("Test scenario 6: Test time.getTime24() is 17:49");
+        System.out.println("Expected: 1749");
+        System.out.println("Actual: " + time.getTime24());
+
+        System.out.println("Test scenario 7: Test time.getTime12() is 5:49 PM");
+        System.out.println("Expected: 5:49 PM");
+        System.out.println("Actual: " + time.getTime12());
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_4/Characteristic.java

@@ -0,0 +1,69 @@
+package me.alex4386.gachon.sw14462.day11.ex6_4;
+
+import java.util.Scanner;
+
+public class Characteristic {
+
+    private String description;
+    private int rating;
+
+    public Characteristic(String description) {
+        this.description = description;
+        this.rating = 0;
+    }
+
+    private boolean isValid(int aRating) {
+        // range check
+        return aRating >= 1 && aRating <= 10;
+    }
+
+    public void setRating(int aRating) {
+        if (this.isValid(aRating)) {
+            this.rating = aRating;
+        } else {
+            throw new IllegalArgumentException("Invalid rating");
+        }
+    }
+
+    public void setRating() {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Characteristic: "+this.description);
+        System.out.print("Enter a rating: ");
+        int aRating = scanner.nextInt();
+
+        try {
+            this.setRating(aRating);
+        } catch (IllegalArgumentException e) {
+            System.err.println("Invalid Rating! Please enter a rating between 1 and 10.");
+        }
+    }
+
+
+    public String getDescription() {
+        return this.description;
+    }
+
+    public int getRating() {
+        return this.rating;
+    }
+
+    private double getCompatibilityMeasure(Characteristic otherRating) {
+        // early return to catch if it hasn't rated yet.
+        if (this.rating == 0 || otherRating.rating == 0) {
+            return 0.0;
+        }
+
+        return 1.0 - (Math.pow(this.rating - otherRating.rating, 2) / 81.0);
+    }
+
+    private boolean isMatch(Characteristic otherRating) {
+        return this.description.equals(otherRating.description);
+    }
+
+    public double getCompatibility(Characteristic otherRating) {
+        return this.isMatch(otherRating) ?
+                this.getCompatibilityMeasure(otherRating) :
+                0.0;
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_4/CharacteristicTest.java

@@ -0,0 +1,40 @@
+package me.alex4386.gachon.sw14462.day11.ex6_4;
+
+public class CharacteristicTest {
+    public static void main(String[] args) {
+        Characteristic character1 = new Characteristic("Sample Description for Characteristic 1, 3 and 4");
+        Characteristic character2 = new Characteristic("Sample Description for Characteristic 2");
+        Characteristic character3 = new Characteristic("Sample Description for Characteristic 1, 3 and 4");
+        Characteristic character4 = new Characteristic("Sample Description for Characteristic 1, 3 and 4");
+
+        System.out.println("character1.getDescription() = " + character1.getDescription());
+        System.out.println("character2.getDescription() = " + character2.getDescription());
+        System.out.println("character3.getDescription() = " + character3.getDescription());
+        System.out.println("character4.getDescription() = " + character4.getDescription());
+
+        System.out.println("Requesting rating for character1...");
+        character1.setRating();
+        System.out.println("character1.getRating() = " + character1.getRating());
+
+        if (character1.getRating() == 0) {
+            System.out.println("Due to invalid rating input, character1's rating is still 0. Provisioning instance's rating to 5.");
+            character1.setRating(5);
+        }
+
+        System.out.println("Setting rating for character2 to "+character1.getRating());
+        character2.setRating(character1.getRating());
+        System.out.println("character2.getRating() = " + character2.getRating());
+
+        System.out.println("Setting rating for character3 to "+character1.getRating());
+        character3.setRating(character1.getRating());
+        System.out.println("character3.getRating() = " + character2.getRating());
+
+        System.out.println("Setting rating for character4 to 9");
+        character4.setRating(1);
+        System.out.println("character4.getRating() = " + character4.getRating());
+
+        System.out.println("character1.getCompatibility(character2) = " + character1.getCompatibility(character2));
+        System.out.println("character1.getCompatibility(character3) = " + character1.getCompatibility(character3));
+        System.out.println("character1.getCompatibility(character4) = " + character1.getCompatibility(character4));
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_4/Main.java

@@ -0,0 +1,8 @@
+package me.alex4386.gachon.sw14462.day11.ex6_4;
+
+public class Main {
+
+    public static void main(String[] args) {
+        CharacteristicTest.main(args);
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_6/Main.java

@@ -0,0 +1,7 @@
+package me.alex4386.gachon.sw14462.day11.ex6_6;
+
+public class Main {
+    public static void main(String[] args) {
+        PersonTest.main(args);
+    }
+}

src/main/java/me/alex4386/gachon/sw14462/day11/ex6_6/Person.java

@@ -0,0 +1,93 @@
+package me.alex4386.gachon.sw14462.day11.ex6_6;
+
+public class Person
+{
+    private String name;
+    private int age;
+
+    /* Start of Exercise 10 */
+    public Person() {
+        this("No name yet", 0);
+    }
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+
+    public static Person createAdult() {
+        return new Person("An adult", 21);
+    }
+    /* End of Exercise 10 */
+
+    /* From the Self-Test Question 16 */
+
+    /*
+        // Commented-out since due to duplicate requirement
+        // from Programming Project 6
+
+        public void setName(String newName)
+        {
+            name = newName;
+        }
+
+        public void setAge(int newAge)
+        {
+            if (newAge >= 0)
+                age = newAge;
+            else
+            {
+                System.out.println("ERROR: Age is " +
+                        "negative.");
+                System.exit(0);
+            }
+        }
+     */
+
+    public void setPerson(String newName, int newAge)
+    {
+        setName(newName);
+        setAge(newAge);
+    }
+    /* End of Self-Test Question 16 */
+
+
+    /* Start of Programming projects 6 */
+    public String getName() {
+        return this.name;
+    }
+
+    public int getAge() {
+        return this.age;
+    }
+
+    public void setName(String first, String last) {
+        this.name = first + " " + last;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setAge(int age) {
+        if (this.age < 0) throw new IllegalArgumentException("Age cannot be negative");
+        this.age = age;
+    }
+
+    public static Person createToddler() {
+        return new Person("A toddler", 2);
+    }
+
+    public static Person createPreschooler() {
+        return new Person("A preschooler", 5);
+    }
+
+    public static Person createAdolescent() {
+        return new Person("An adolescent", 9);
+    }
+
+    public static Person createTeenager() {
+        return new Person("A teenager", 15);
+    }
+}