First Commit

Challenge1/build.gradle.kts

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+plugins {
+    id("java")
+}
+
+group = "org.lumijiez"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation(platform("org.junit:junit-bom:5.9.1"))
+    testImplementation("org.junit.jupiter:junit-jupiter")
+}
+
+tasks.test {
+    useJUnitPlatform()
+}

Challenge1/src/main/java/org/lumijiez/Diamond.java

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+package org.lumijiez;
+public class Diamond {
+    public static void draw(int size) {
+        if (size % 2 == 0) {
+            System.out.println("Please give an odd number");
+            return;
+        }
+        int count = 1;
+        for (int x = 0; x < size; x++) {
+            for (int y = 0; y <= size; y++) System.out.print((y >= (size - count) / 2 && y <= (size / 2 + count / 2)) ? '*' : ' ');
+            System.out.println();
+            count += (x < size / 2) ? 2 : -2;
+        }
+
+    }
+}
+
+
+

Challenge1/src/main/java/org/lumijiez/Main.java

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+package org.lumijiez;
+
+public class Main {
+    public static void main(String[] args) {
+        // First Challenge
+        User.printInitials(new User("Dominic", "Toretto"));
+
+        // Second Challenge
+        MathUtils.printSumMultiples(10);
+
+        // Third Challenge
+        Diamond.draw(7);
+
+        // Fourth Challenge
+        Member member1 = new Member("Don", 56, 9);
+        member1.printCategory();
+
+        // Fifth Challenge
+        MathUtils.printNextPerfectSqr(64);
+
+        // Sixth Challenge
+        MathUtils.printIsNarcissistic(153);
+    }
+}

Challenge1/src/main/java/org/lumijiez/MathUtils.java

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+package org.lumijiez;
+
+public class MathUtils {
+    public static void printSumMultiples(int number) {
+        int sum = 0;
+        for(int x = 0; x < number; x++) sum += (x % 3 == 0 || x % 5 == 0) ? x : 0;
+        System.out.println("The sum of all multiples of 3 and 5 is: " + sum);
+    }
+
+    // Nested as fuck, but 1 line
+    public static void printNextPerfectSqr(double number) {
+        System.out.println(Math.pow(Math.ceil(Math.sqrt((number == Math.pow(Math.ceil(Math.sqrt(number)), 2) ? number + 1 : number))), 2));
+    }
+
+    // Streams seemed useful here
+    public static void printIsNarcissistic(int number) {
+        System.out.println(String.valueOf(number).chars()
+                .mapToObj(Character::getNumericValue)
+                .map(n -> (int) Math.pow(n, String.valueOf(number).length()))
+                .reduce(0, Integer::sum) == number ? "Narcissistic" : "NOT");
+    }
+}
+

Challenge1/src/main/java/org/lumijiez/Member.java

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+package org.lumijiez;
+
+public class Member {
+    private final int age;
+    private final int handicap;
+    private final String category;
+
+    public int getAge() {
+        return age;
+    }
+
+    public int getHandicap() {
+        return handicap;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    private String name;
+    public Member(String name, int age, int handicap) {
+        this.age = age;
+        this.handicap = handicap;
+        this.name = name;
+        this.category = (age > 55 && handicap > 7) ? "SENIOR" : "OPEN";
+    }
+
+
+    public void printCategory() {
+        System.out.println(this.category);
+    }
+}

Challenge1/src/main/java/org/lumijiez/User.java

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+package org.lumijiez;
+public class User {
+    public String firstName, lastName;
+
+    public User(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public static void printInitials(User user) {
+        System.out.print(user.firstName.charAt(0) + ". " + user.lastName.charAt(0) + ". \n");
+    }
+}