First Commit

.gitignore

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+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/gradle.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/Challenge1" />
+            <option value="$PROJECT_DIR$/Lab1" />
+            <option value="$PROJECT_DIR$/Lab2" />
+            <option value="$PROJECT_DIR$/untitled" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="temurin-17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

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");
+    }
+}

Lab1/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()
+}

Lab1/src/main/java/org/lumijiez/Main.java

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+package org.lumijiez;
+
+public class Main {
+    public static void main(String[] args) {
+
+        // Printer class initialization, with an PrintHandler dependency injection
+        Printer out = new Printer(new PrintHandler());
+
+        // Pool handler, stores all threads and manipulates them
+        ThreadPoolHandler TH = new ThreadPoolHandler();
+
+        // Fills the threadpool with runnables
+        TH.addThread(new Thread(new OutputRunnable(out, "Hello world!", 1000)));
+        TH.addThread(new Thread(new OutputRunnable(out, "I love OOP!", 2000)));
+
+        // Starts the async printing threads
+        TH.startAll();
+
+        // Keep printing for 5 seconds
+        ThreadPoolHandler.safeSleep(5000);
+
+        // Add a thread while the others are running
+        TH.addThreadWhileRunning(new Thread(new OutputRunnable(out, "Added while running!", 500)));
+
+        // Keep printing for 5 seconds
+        ThreadPoolHandler.safeSleep(5000);
+
+        // Stop all running threads
+        TH.deleteAll();
+
+        out.print("Bye-bye!");
+    }
+}

Lab1/src/main/java/org/lumijiez/OutputRunnable.java

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+package org.lumijiez;
+
+public class OutputRunnable implements Runnable {
+
+    // Printer dependency
+    private final Printer printer;
+
+    private final String text;
+    private final int sleepInterval;
+
+    public OutputRunnable(Printer printer, String text, int sleepInterval) {
+        this.printer = printer;
+        this.text = text;
+        this.sleepInterval = sleepInterval;
+    }
+
+    @Override
+    public void run() {
+        while (!Thread.currentThread().isInterrupted()) {
+            try {
+                printer.print(text);
+                Thread.sleep(sleepInterval);
+            } catch (InterruptedException e) {
+                // Thread was interrupted, exit the loop
+                Thread.currentThread().interrupt();
+                break;
+            }
+        }
+    }
+}

Lab1/src/main/java/org/lumijiez/PrintHandler.java

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+package org.lumijiez;
+
+import org.lumijiez.interfaces.PrintHandlerImpl;
+
+// Handler, to be injected as a dependency
+public class PrintHandler implements PrintHandlerImpl {
+
+    @Override
+    public void output(String text) {
+        System.out.println(text);
+    }
+}

Lab1/src/main/java/org/lumijiez/Printer.java

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+package org.lumijiez;
+
+import org.lumijiez.interfaces.PrinterImpl;
+
+public class Printer implements PrinterImpl {
+
+    // Dependency Injection
+    private final PrintHandler handler;
+
+    // Constructor
+    public Printer(PrintHandler handler) {
+        this.handler = handler;
+    }
+
+    // Dependency Consumer
+    @Override
+    public void print(String text) {
+        this.handler.output(text);
+    }
+}

Lab1/src/main/java/org/lumijiez/ThreadPoolHandler.java

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+package org.lumijiez;
+
+import java.util.ArrayList;
+
+public class ThreadPoolHandler {
+    private final ArrayList<Thread> threadPool = new ArrayList<>();
+
+    public static void safeSleep(int milliseconds) {
+        try {
+            Thread.sleep(milliseconds);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public void addThread(Thread thread) {
+        threadPool.add(thread);
+    }
+
+    public void addThreadWhileRunning(Thread thread) {
+        threadPool.add(thread);
+        thread.start();
+    }
+
+    public void startAll() {
+        for (Thread thread : threadPool) {
+            thread.start();
+        }
+    }
+
+    public void interruptAll() {
+        for (Thread thread : threadPool) {
+            thread.interrupt();
+        }
+    }
+
+    public void deleteAll() {
+        this.interruptAll();
+        threadPool.clear();
+    }
+}

Lab1/src/main/java/org/lumijiez/interfaces/PrintHandlerImpl.java

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+package org.lumijiez.interfaces;
+
+public interface PrintHandlerImpl {
+    void output(String text);
+}

Lab1/src/main/java/org/lumijiez/interfaces/PrinterImpl.java

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+package org.lumijiez.interfaces;
+
+public interface PrinterImpl {
+    void print(String text);
+}

Lab2/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()
+}

Lab2/src/main/java/org/lumijiez/Main.java

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+package org.lumijiez;
+
+import org.lumijiez.base.Grade;
+import org.lumijiez.base.NameSurnameGroup;
+import org.lumijiez.data.DataDeserializer;
+import org.lumijiez.data.DataSerializer;
+import org.lumijiez.managers.Manager;
+
+import java.util.Scanner;
+
+public class Main {
+    public static NameSurnameGroup readNSG() {
+        String name = sc.nextLine();
+        String surname = sc.nextLine();
+        String group = sc.nextLine();
+        return new NameSurnameGroup(name, surname, group);
+    }
+    public static Scanner sc = new Scanner(System.in);
+    public static void main(String[] args) {
+        Manager studentManager = DataDeserializer.deserialize();
+
+        boolean exit = false;
+        while (!exit) {
+            System.out.println("===== Student Management System =====");
+            System.out.println("1. Show Students");
+            System.out.println("2. Show Groups");
+            System.out.println("3. Show Grades of a Student");
+            System.out.println("4. Add Grade to Student");
+            System.out.println("5. Add Student");
+            System.out.println("6. Remove student");
+            System.out.println("7. Exit and save");
+            System.out.print("Enter your choice: ");
+
+            int choice = sc.nextInt();
+            sc.nextLine();
+
+            switch (choice) {
+                case 1 -> studentManager.printStudents();
+                case 2 -> studentManager.printGroups();
+                case 3 -> studentManager.printGrades(readNSG());
+                case 4 -> studentManager.addGrade(readNSG(), new Grade(sc.nextLine(), sc.nextInt()));
+                case 5 -> studentManager.addStudent(readNSG());
+                case 6 -> studentManager.removeStudent(readNSG());
+                case 7 -> {
+                    DataSerializer.serialize(studentManager);
+                    exit = true;
+                }
+                default -> System.out.println("Invalid choice. Please try again.");
+            }
+
+            if (!exit) {
+                System.out.println("Press Enter to continue...");
+                sc.nextLine();
+            }
+        }
+
+        System.out.println("Goodbye!");
+    }
+}

Lab2/src/main/java/org/lumijiez/base/Grade.java

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+package org.lumijiez.base;
+
+import java.io.Serializable;
+
+public class Grade implements Serializable {
+    private final String subject;
+    private final int grade;
+
+    public Grade(String subject, int grade) {
+        this.subject = subject;
+        this.grade = grade;
+    }
+
+    public String getSubject() {
+        return subject;
+    }
+
+    public int getGrade() {
+        return grade;
+    }
+
+}

Lab2/src/main/java/org/lumijiez/base/Group.java

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+package org.lumijiez.base;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Group implements Serializable {
+    private final String name;
+    private final List<Student> students = new ArrayList<>();
+
+    public Group(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void addStudent(Student st) {
+        students.add(st);
+    }
+    public void deleteStudent(Student st) {
+        students.remove(st);
+    }
+
+    public List<Student> getStudents() {
+        return students;
+    }
+
+    public Student getStudent(String name, String surname) {
+        for (Student student : students) {
+            if (student.getName().equals(name) && student.getSurname().equals(surname)) {
+                return student;
+            }
+        }
+        return null;
+    }
+}

Lab2/src/main/java/org/lumijiez/base/NameSurnameGroup.java

@@ -0,0 +1,25 @@
+package org.lumijiez.base;
+
+public class NameSurnameGroup {
+    private final String name;
+    private final String surname;
+    private final String groupName;
+
+    public NameSurnameGroup(String name, String surname, String groupName) {
+        this.name = name;
+        this.surname = surname;
+        this.groupName = groupName;
+    }
+
+    public String name() {
+        return name;
+    }
+
+    public String surname() {
+        return surname;
+    }
+
+    public String group() {
+        return groupName;
+    }
+}

Lab2/src/main/java/org/lumijiez/base/Student.java

@@ -0,0 +1,50 @@
+package org.lumijiez.base;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Student implements Serializable {
+    private final String name;
+    private final String surname;
+    private final String fullname;
+    private Group group;
+    private final List<Grade> grades = new ArrayList<>();
+
+    public Student(String name, String surname, Group group) {
+        this.name = name;
+        this.surname = surname;
+        this.fullname = name + " " + surname;
+        this.group = group;
+    }
+
+    public void setGroup(Group gr) {
+        this.group.deleteStudent(this);
+        this.group = gr;
+        gr.addStudent(this);
+    }
+
+    public List<Grade> getGrades() {
+        return grades;
+    }
+
+    public void addGrade(Grade grade) {
+        grades.add(grade);
+    }
+    public String getName() {
+        return name;
+    }
+
+    public String getSurname() {
+        return surname;
+    }
+
+    public String getFullname() {
+        return fullname;
+    }
+
+    public Group getGroup() {
+        return group;
+    }
+
+}

Lab2/src/main/java/org/lumijiez/data/DataDeserializer.java

@@ -0,0 +1,27 @@
+package org.lumijiez.data;
+
+import org.lumijiez.managers.Manager;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+public class DataDeserializer {
+    public static Manager deserialize() {
+        File serializedFile = new File("manager.ser");
+        Manager manager = new Manager();
+        if (serializedFile.exists()) {
+            try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(serializedFile))) {
+                manager = (Manager) ois.readObject();
+                System.out.println("Manager object deserialized successfully.");
+            } catch (IOException | ClassNotFoundException e) {
+                e.printStackTrace();
+            }
+        } else {
+            System.out.println("Serialized file 'manager.ser' does not exist.");
+        }
+        return manager;
+    }
+
+}

Lab2/src/main/java/org/lumijiez/data/DataSerializer.java

@@ -0,0 +1,20 @@
+package org.lumijiez.data;
+
+import org.lumijiez.managers.Manager;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+
+public class DataSerializer {
+
+    public static void serialize(Manager manager) {
+        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("manager.ser"))) {
+            oos.writeObject(manager);
+            System.out.println("Manager object serialized successfully.");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+}

Lab2/src/main/java/org/lumijiez/managers/GroupManager.java

@@ -0,0 +1,35 @@
+package org.lumijiez.managers;
+
+import org.lumijiez.base.Group;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+public class GroupManager implements Serializable {
+    private final List<Group> groups = new ArrayList<>();
+
+    public Group getGroup(String groupName) {
+        for (Group group : groups) {
+            if (group.getName().equals(groupName)) {
+                return group;
+            }
+        }
+        Group newGroup = new Group(groupName);
+        groups.add(newGroup);
+        return newGroup;
+    }
+
+    public void addGroup(Group group) {
+        groups.add(group);
+    }
+
+    public List<Group> getGroups() {
+        return groups;
+    }
+
+    public void deleteGroup(Group group) {
+        groups.remove(group);
+    }
+
+}

Lab2/src/main/java/org/lumijiez/managers/Manager.java

@@ -0,0 +1,59 @@
+package org.lumijiez.managers;
+
+import org.lumijiez.base.Grade;
+import org.lumijiez.base.Group;
+import org.lumijiez.base.NameSurnameGroup;
+import org.lumijiez.base.Student;
+
+import java.io.Serializable;
+
+public class Manager implements Serializable {
+    GroupManager groupManager;
+
+    public Manager() {
+        this.groupManager = new GroupManager();
+    }
+
+    public void addGroup(String groupName) {
+        groupManager.addGroup(new Group(groupName));
+    }
+
+    public void addStudent(NameSurnameGroup NSG) {
+        Group currentGroup = groupManager.getGroup(NSG.group());
+        currentGroup.addStudent(new Student(NSG.name(), NSG.surname(), currentGroup));
+    }
+
+    public void printStudents() {
+        for (Group group : groupManager.getGroups()) {
+            for (Student student : group.getStudents()) {
+                System.out.println(student.getFullname() + " " + student.getGroup().getName());
+            }
+        }
+    }
+
+    public void printGroups() {
+        for (Group group : groupManager.getGroups()) {
+            System.out.println(group.getName());
+        }
+    }
+
+    public void printGrades(NameSurnameGroup NSG) {
+        Student student = groupManager.getGroup(NSG.group()).getStudent(NSG.name(), NSG.surname());
+        for (Grade grade : student.getGrades()) {
+            System.out.println(grade.getSubject() + " " + grade.getGrade());
+        }
+    }
+
+    public void addGrade(NameSurnameGroup NSG, Grade grade) {
+        Student student = groupManager.getGroup(NSG.group()).getStudent(NSG.name(), NSG.surname());
+        student.addGrade(grade);
+    }
+
+    public void removeStudent(NameSurnameGroup NSG) {
+        Student student = groupManager.getGroup(NSG.group()).getStudent(NSG.name(), NSG.surname());
+        groupManager.getGroup(NSG.group()).deleteStudent(student);
+        if (student.getGroup().getStudents().isEmpty()) {
+            groupManager.getGroups().remove(student.getGroup());
+        }
+    }
+}

build.gradle.kts

@@ -0,0 +1,19 @@
+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()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Tue Sep 19 21:39:32 EEST 2023
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,5 @@
+rootProject.name = "oop-labs"
+include("untitled")
+include("Lab1")
+include("Challenge1")
+include("Lab2")