completed lab

interfaces-1.iml

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+<?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_1_5">
+    <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>

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

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+package io.zipcoder.interfaces;
+
+public class ConcretePeople extends People<Person> {
+    public Person[] toArray(){
+        Person[] arr = new Person[personList.size()];
+        return personList.toArray(arr);
+    }
+}

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

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+package io.zipcoder.interfaces;
+
+public enum Educator implements Teacher {
+    INSTRUCTOR0(1L, "instructor0"), INSTRUCTOR1(2L, "instructor1"),
+    INSTRUCTOR2(3L, "instructor2");
+
+    private Instructor instructor;
+    private Double timeWorked = 0.0;
+
+    Educator(Long id, String name) {
+        this.instructor = new Instructor(id, name);
+    }
+
+    public void teach(Learner learner, Double numberOfHours) {
+        timeWorked += numberOfHours;
+        learner.learn(numberOfHours);
+    }
+
+    public void lecture(Learner[] learners, Double numberOfHours) {
+        Double numberOfHoursPerLearner = numberOfHours / learners.length;
+        for (Learner learner : learners) {
+            teach(learner, numberOfHoursPerLearner);
+        }
+    }
+
+    public Double getTimeWorked() {
+        return timeWorked;
+    }
+}

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

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

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

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+package io.zipcoder.interfaces;
+
+public class Instructors extends People<Instructor> {
+    private static final Instructors INSTANCE = new Instructors();
+
+    public Instructors() {
+        super();
+        super.add(new Instructor(1, "Froilan"));
+        super.add(new Instructor(2, "Dolio"));
+        super.add(new Instructor(3, "Roberto"));
+    }
+
+    public Instructor[] toArray() {
+        return personList.toArray(new Instructor[0]);
+    }
+
+    public static Instructors getInstance() {
+        return INSTANCE;
+    }
+
+}

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

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+package io.zipcoder.interfaces;
+
+public interface Learner {
+    void learn(double numberOfHours);
+    Double getTotalStudyTime();
+}
+