Learned a ton

interfaces-1.iml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_11">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

pom.xml

@@ -5,6 +5,18 @@
   <groupId>io.zipcoder</groupId>
   <artifactId>interfaces-1</artifactId>
   <version>0.0.1-SNAPSHOT</version>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>11</source>
+          <target>11</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
   <packaging>jar</packaging>
 
   <name>interfaces-1</name>

src/main/java/io/zipcoder/interfaces/Educator.java

@@ -0,0 +1,31 @@
+package io.zipcoder.interfaces;
+
+public enum Educator implements Teacher {
+    Leon(111L, "Leon"),
+    Dolio(112L, "Dolio"),
+    Kris(113L, "Kris");
+
+    final Instructor instructor;
+    double timeWorked;
+
+    Educator(Long id, String name) {
+        instructor = new Instructor(id, name);
+        Instructors.getInstance().add(instructor);
+    }
+
+
+    @Override
+    public void teach(Learner learner, double numberOfHours) {
+        learner.learn(numberOfHours);
+        timeWorked += numberOfHours;
+    }
+
+    @Override
+    public void lecture(Learner[] learners, double numberOfHours) {
+        double numberOfHoursPerLearner = (numberOfHours / learners.length);
+        for (Learner learner : learners) {
+            learner.learn(numberOfHoursPerLearner);
+        }
+        timeWorked += numberOfHours;
+    }
+}

src/main/java/io/zipcoder/interfaces/Instructor.java

@@ -0,0 +1,27 @@
+package io.zipcoder.interfaces;
+
+public class Instructor extends Person implements Teacher {
+
+    public Instructor(Long id, String name) {
+        super(id, name);
+    }
+
+    @Override
+    public void teach(Learner learner, double numberOfHours) {
+        learner.learn(numberOfHours);
+
+    }
+
+    @Override
+    public void lecture(Learner[] learners, double numberOfHours) {
+
+        double numberOfHoursPerLearner = (numberOfHours / learners.length);
+//      for (int i = 0; i < learners.length; i++) {
+//          learners[i].learn(numberOfHoursPerLearner);
+
+        for (Learner learner : learners) {
+            learner.learn(numberOfHoursPerLearner);
+        }
+    }
+
+}

src/main/java/io/zipcoder/interfaces/Instructors.java

@@ -0,0 +1,22 @@
+package io.zipcoder.interfaces;
+
+public class Instructors extends People<Instructor> {
+
+    private static final Instructors INSTANCE = new Instructors();
+
+    private Instructors() {
+        add(new Instructor(111L,"Leon"));
+        add(new Instructor(112L,"Dolio"));
+        add(new Instructor(113L,"Kris"));
+    }
+
+    public static Instructors getInstance() {
+        return INSTANCE;
+    }
+
+
+    @Override
+    public Instructor[] toArray() {
+        return personList.toArray(new Instructor[0]);
+    }
+}

src/main/java/io/zipcoder/interfaces/Learner.java

@@ -0,0 +1,8 @@
+package io.zipcoder.interfaces;
+
+public interface Learner {
+
+    void learn(double numberOfHours);
+
+    Double getTotalStudyTime();
+}

src/main/java/io/zipcoder/interfaces/People.java

@@ -0,0 +1,62 @@
+package io.zipcoder.interfaces;
+
+import java.util.ArrayList;
+
+import java.util.Iterator;
+import java.util.List;
+
+public abstract class People<E extends Person> implements Iterable<E> {
+
+    List<E> personList = new ArrayList<>();
+
+
+
+    public void add(E person) {
+        personList.add(person);
+    }
+
+    public E findById(Long id) {
+        for(E person : personList){
+            if (person.getId() == (id)) {
+                return person;
+            }
+        }
+        return null;
+    }
+
+    public Boolean contains(Person person) {
+        //if (personList.contains(person)) {
+        for( Person person1 : personList) {
+            if (person1.getName() == person.name
+                    && person1.getId() == person.id) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public void remove(Person person) {
+        personList.remove(person);
+    }
+
+     public void remove(Long id) {
+        personList.remove(findById(id));
+     }
+
+    public void removeAll() {
+        personList.clear();
+    }
+
+    public int count(){
+        return personList.size();
+    }
+
+    public abstract E[] toArray();
+
+
+    @Override
+    public Iterator<E> iterator() {
+        Iterator iteratorList = personList.iterator();
+        return iteratorList;
+    }
+}

src/main/java/io/zipcoder/interfaces/Person.java

@@ -1,5 +1,24 @@
 package io.zipcoder.interfaces;
 
 public class Person {
+    final Long id;
+    String name;
+
+    public Person(Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
 
 }

src/main/java/io/zipcoder/interfaces/Student.java

@@ -0,0 +1,21 @@
+package io.zipcoder.interfaces;
+
+public class Student extends Person implements Learner {
+
+    public Student(Long id, String name) {
+        super(id, name);
+    }
+
+    double totalStudyTime;
+
+
+    @Override
+    public void learn(double numberOfHours) {
+        totalStudyTime = totalStudyTime + numberOfHours;
+    }
+
+    @Override
+    public Double getTotalStudyTime() {
+        return totalStudyTime;
+    }
+}

src/main/java/io/zipcoder/interfaces/Students.java

@@ -0,0 +1,43 @@
+package io.zipcoder.interfaces;
+
+public class Students extends People<Student> {
+
+    private static final Students INSTANCE = new Students();
+
+    private Students(){
+        add(new Student(122L, "Manny"));
+        add(new Student(123L, "ZachK"));
+        add(new Student(124L, "Rex"));
+        add(new Student(125L, "Nisha"));
+        add(new Student(126L, "Bobbi"));
+        add(new Student(127L, "Aidan"));
+        add(new Student(128L, "Charnae"));
+        add(new Student(129L, "Chuck"));
+        add(new Student(130L, "Dee"));
+        add(new Student(131L, "Dipinti"));
+        add(new Student(132L, "Jen"));
+        add(new Student(133L, "Jeremy"));
+        add(new Student(134L, "John"));
+        add(new Student(135L, "ZachS"));
+        add(new Student(136L, "Laura"));
+        add(new Student(137L, "Nathan"));
+        add(new Student(138L, "Nikki"));
+        add(new Student(139L, "Raymond"));
+        add(new Student(140L, "Sean"));
+        add(new Student(141L, "Sitara"));
+        add(new Student(142L, "Tatiana"));
+        add(new Student(143L, "Wesley"));
+
+    }
+
+
+    public static Students getInstance(){
+        return INSTANCE;
+    }
+
+
+    @Override
+    public Student[] toArray() {
+        return personList.toArray(new Student[0]);
+    }
+}