Completed Lab

.idea/uiDesigner.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
+      </item>
+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.png" removable="false" auto-create-binding="false" can-attach-label="true">
+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.png" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
+          <preferred-size width="-1" height="20" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>

.idea/workspace.xml

 <project version="4">
   <component name="ChangeListManager">
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-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/uiDesigner.xml" afterDir="false" />
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+      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipcodeWilmington.java" afterDir="false" />
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   </component>
   <component name="FileEditorManager">
-    <leaf>
+    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
       <file pinned="false" current-in-tab="false">
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+      <provider selected="true" editor-type-id="text-editor">
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+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="150">
-          <caret line="10" column="9" lean-forward="true" selection-start-line="10" selection-start-column="9" selection-end-line="10" selection-end-column="9" />
+          <caret line="10" lean-forward="true" selection-start-line="10" selection-end-line="10" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="653">
+          <caret line="49" column="38" selection-start-line="49" selection-start-column="27" selection-end-line="49" selection-end-column="38" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="240">
+          <caret line="18" selection-start-line="18" selection-end-line="18" />
           <folding>
-            <element signature="imports" expanded="true" />
+            <element signature="e#202#203#0" expanded="true" />
+            <element signature="e#227#228#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipcodeWilmington.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="195">
+          <caret line="15" selection-start-line="15" selection-end-line="15" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="167">
-          <caret line="20" column="54" lean-forward="true" selection-start-line="20" selection-start-column="54" selection-end-line="20" selection-end-column="54" />
+        <state relative-caret-position="495">
+          <caret line="45" column="36" selection-start-line="45" selection-start-column="36" selection-end-line="45" selection-end-column="36" />
           <folding>
             <element signature="imports" expanded="true" />
+            <element signature="e#479#480#0" expanded="true" />
+            <element signature="e#543#544#0" expanded="true" />
+            <element signature="method#testTeach#0;class#TestInstructor#0" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructors.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="405">
-          <caret line="27" selection-start-line="27" selection-end-line="27" />
+        <state relative-caret-position="300">
+          <caret line="20" column="43" selection-start-line="20" selection-start-column="43" selection-end-line="20" selection-end-column="43" />
           <folding>
-            <element signature="e#235#236#0" expanded="true" />
-            <element signature="e#263#264#0" expanded="true" />
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-            <element signature="e#316#317#0" expanded="true" />
-            <element signature="e#351#352#0" expanded="true" />
-            <element signature="e#383#384#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestPerson.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="315">
-          <caret line="21" column="1" lean-forward="true" selection-start-line="21" selection-start-column="1" selection-end-line="21" selection-end-column="1" />
+          <caret line="21" column="8" selection-start-line="21" selection-start-column="8" selection-end-line="21" selection-end-column="8" />
           <folding>
-            <element signature="e#260#261#0" expanded="true" />
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-            <element signature="e#361#362#0" expanded="true" />
-            <element signature="e#404#405#0" expanded="true" />
-            <element signature="e#451#452#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="90">
-          <caret line="6" column="62" selection-start-line="6" selection-start-column="62" selection-end-line="6" selection-end-column="62" />
+        <state relative-caret-position="195">
+          <caret line="13" selection-start-line="13" selection-end-line="13" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudents.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="403">
-          <caret line="47" column="96" selection-start-line="47" selection-start-column="96" selection-end-line="47" selection-end-column="96" />
+        <state relative-caret-position="270">
+          <caret line="18" column="25" selection-start-line="18" selection-start-column="25" selection-end-line="18" selection-end-column="25" />
           <folding>
             <element signature="imports" expanded="true" />
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           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestZipCodeWilmington.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="345">
-          <caret line="23" column="5" lean-forward="true" selection-start-line="23" selection-start-column="5" selection-end-line="23" selection-end-column="5" />
+          <caret line="23" column="4" selection-start-line="23" selection-start-column="4" selection-end-line="23" selection-end-column="4" />
           <folding>
-            <element signature="e#138#139#0" expanded="true" />
-            <element signature="e#169#170#0" expanded="true" />
-            <element signature="e#203#204#0" expanded="true" />
-            <element signature="e#228#229#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestPeople.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="28">
-          <caret line="6" column="60" lean-forward="true" selection-start-line="6" selection-start-column="60" selection-end-line="6" selection-end-column="60" />
+        <state relative-caret-position="750">
+          <caret line="50" column="32" selection-start-line="50" selection-start-column="32" selection-end-line="50" selection-end-column="32" />
           <folding>
-            <element signature="e#134#142#0" expanded="true" />
-            <element signature="e#486#487#0" expanded="true" />
-            <element signature="e#535#536#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/README.md">
+      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+        <state split_layout="SECOND">
+          <first_editor />
+          <second_editor />
+        </state>
+      </provider>
+    </entry>
   </component>
   <component name="masterDetails">
     <states>

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

 
 public class Instructor extends Person implements Teacher {
 
-    public Instructor(long id, String name) {
-        super(id, name);
+    public Instructor (String name,long id) {
+        super(name,id);
     }
 
     public Instructor(long id) {
 
     }
 
-    public void lecture(Learner[] learners, double numOfHrs) {
+    public void lecture(Student[] students1, double numOfHrs) {
+
+    }
+
+    public void Lecture(Learner[] learners, double numOfHrs) {
         double numOfHrsPerLearner = numOfHrs/learners.length;
 
         for(Learner learner : learners){

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

+package io.zipcoder.interfaces;
+
+public class Instructors extends People <Instructor> {
+    private static Instructors ourInstance = new Instructors();
+
+    public static Instructors getInstance() {
+        return ourInstance;
+    }
+
+    private Instructors() {
+        personList.add(new Instructor("Wil", 2));
+        personList.add(new Instructor("Dolio", 4));
+        personList.add(new Instructor("Kris", 7));
+        personList.add(new Instructor("Nhu", 8));
+    }
+
+    @Override
+    public Instructor[] getArray() {
+        Instructor[] instructor = new Instructor[personList.size()];
+        for (int i = 0; i < personList.size(); i++)
+            instructor[i] = personList.get(i);
+            return instructor;
+
+    }
+}

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

 
 import java.util.ArrayList;
 
-public class People {
+public abstract class People <E extends Person> {
 
-    ArrayList <Person> personList = new ArrayList<Person>();
+    ArrayList<E> personList = new ArrayList<E>();
 
-    public void add(Person p){
+    public void add(E p) {
         personList.add(p);
-        //or
-        //this.personList.add(p)
+        //or  this.personList.add(p);
     }
 
-//    public long findById(long id){
-//
-//        personList.getId(id);
-////
-//        for (Person p : personList){
-//            if (p.getId() == id){
-//                return p;
-// }
-
-    public void remove(Person person){
-            personList.remove(person);
-        }
-    public void remove (Long id){
-        for (Person p : personList){
+
+    public E findById (long id){
+        E personToFind = null;// Remove null
+        for(int i = 0; i < personList.size();i++){
+            if(personList.get(i).getId() == id){
+                personToFind = personList.get(i);
+            } }
+           return personToFind;
+    }
+
+    public void removeById (long id){
+        for (E p : personList){
             if (p.getId() == id){
                 personList.remove(p);
+                break;
             }
         }
     }
 
-    public void removeAll(){
+    public boolean removeAll(){
+        ArrayList <E> array = new ArrayList<E>();
+        return personList.removeAll(array);
 
     }
-}
+
+    public int getCount(){
+
+        return personList.size();
+    }
+
+    public abstract E[] getArray();
+
+}

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

     public final long id;
     public String name;
 
-    public Person (long id, String name){
+    //have two constructor but cannot call both of them at same time when creating object
+
+    public Person(){
+        id = 0;
+    }
+
+    public Person (String name, long id){
         this.id = id;
         this.name = name;
     }
 
-
     public Person(long id){
+
         this.id = id;
     }
     public long getId(){
+
         return id;
     }
 
     public String getName(){
+
         return name;
     }
 

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

 package io.zipcoder.interfaces;
 
 public class Student extends Person implements Learner {
-double totalStudyTime;
+private double totalStudyTime;
 
-public Student (long id, String name){
-    super(id, name);
-    this.totalStudyTime = 0;
+public Student(){
+    super();
+}
+
+public Student (String name, long id){
+    super(name, id);
 }
 
 public void learn (double mumOfHours){
     public void setTotalStudyTime(double totalStudyTime) {
     this.totalStudyTime = totalStudyTime;
     }
+
+
 }

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

+package io.zipcoder.interfaces;
+
+import com.sun.org.apache.bcel.internal.generic.INSTANCEOF;
+
+public class Students extends People <Student> {
+    private static Students INSTANCE = new Students();
+    private Students() {
+
+        personList.add(new Student( "Ned Redmond",1));
+        personList.add(new Student( "Seth Abrams",2));
+        personList.add(new Student( "Akeem Cherry",3));
+        personList.add(new Student( "Whitney Martinez",4));
+        personList.add(new Student( "Nira Parikh",5));
+        personList.add(new Student( "Connor Dunnigan",6));
+        personList.add(new Student( "Christian Sheridan",7));
+        personList.add(new Student( "Curtis Cook",8));
+        personList.add(new Student( "Nuridalia Hernandez",9));
+        personList.add(new Student( "Brandon DeFrancis",10));
+        personList.add(new Student( "De'Jon Johnson",11));
+        personList.add(new Student( "Demetrius Murray",12));
+        personList.add(new Student( "Elliott Stansbury",13));
+        personList.add(new Student( "Nathan Hall",14));
+        personList.add(new Student( "Jae Joson",15));
+        personList.add(new Student( "Jacob Anderson",16));
+        personList.add(new Student( "Jose Bedolla",17));
+        personList.add(new Student( "Jenn Chao",18));
+        personList.add(new Student( "Jennifer Tinkler",19));
+        personList.add(new Student( "Jonathan Hinds",20));
+        personList.add(new Student( "Jay Samuels",21));
+        personList.add(new Student( "Jevit Tith",22));
+        personList.add(new Student( "Lauren Green",23));
+        personList.add(new Student( "Kate Moore",24));
+        personList.add(new Student( "Michelle DiMarino",25));
+        personList.add(new Student( "Maggie Pierse",26));
+        personList.add(new Student( "Nick Satinover",27));
+        personList.add(new Student( "Chaitali Patel",28));
+        personList.add(new Student( "Yesoda Sanka",29));
+        personList.add(new Student( "Saurav Kamath",30));
+        personList.add(new Student( "Sam Bhutani",31));
+        personList.add(new Student( "Soujanya Buragapu",32));
+        personList.add(new Student( "Steffon Williams",33));
+        personList.add(new Student( "Zavon Malone",34));
+        personList.add(new Student( "Thuy Kong",35));
+        personList.add(new Student( "Thulasi Puppala",36));
+        personList.add(new Student( "Trinh Tong",37));
+        personList.add(new Student( "William Brown",38));
+        personList.add(new Student( "Xzavia Cuello",39));
+    }
+
+    public static Students getInstance() {
+        return INSTANCE;
+    }
+
+    @Override
+    public Student[] getArray(){
+        Student [] studnts = new Student[personList.size()];
+        for (int i = 0; i < personList.size(); i++)
+            studnts[i] = personList.get(i);
+            return studnts;
+
+    }
+}

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

 
     public void teach(Learner learner, double numOfHrs);
 
-    public void lecture(Learner [] learners, double numOfHrs);
+    public void Lecture(Learner[] learners, double numOfHrs);
+
+    public void lecture(Student[] students1, double numOfHrs);
 }

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

+package io.zipcoder.interfaces;
+
+import com.sun.org.apache.bcel.internal.generic.INSTANCEOF;
+
+public class ZipcodeWilmington {
+    private static final ZipcodeWilmington INSTANCE = new ZipcodeWilmington();
+    private static final Students students = Students.getInstance();
+    private static final Instructors instructors = Instructors.getInstance();
+
+
+    public static ZipcodeWilmington getInstance() {
+        return INSTANCE;
+    }
+
+    private ZipcodeWilmington() {}
+
+    public void hostLecture (Teacher teacher,double numOfHrs){
+        Student[] students1 = students.getArray();
+        teacher.Lecture(students1,numOfHrs);
+    }
+
+    public void hostLecture (long id,double numOfHrs){
+        Student[] students1 = students.getArray();
+        for (int i = 0; i < instructors.getCount(); i++){
+            if (instructors.personList.get(i).getId() == id){
+                instructors.personList.get(i).Lecture(students1,numOfHrs);
+            }
+        }
+    }
+
+    public static Students getStudents(){
+        return students;
+    }
+
+    public static Instructors getInstructors(){
+        return instructors;
+    }
+}

src/test/java/io/zipcoder/interfaces/TestInstructor.java

 
 public class TestInstructor {
 
-    Instructor instructor = new Instructor(1, "Nhu");
-    Student student = new Student(1, "Nancy");
-    Student student1= new Student(2, "Ron");
-    Student student2= new Student(3, "Ari");
-    Student student3= new Student(4, "Rita");
+    Instructor instructor = new Instructor("Nhu", 1);
+    Student student = new Student( "Nancy", 1);
+    Student student1= new Student( "Ron", 2);
+    Student student2= new Student( "Ari", 3);
+    Student student3= new Student("Rita",4);
 
     Student [] students = new Student[] {student,student1,student2,student3};
 
     @Test
     public void testLecture(){
 
-        //double numOfHrs = 50;
+        double numOfHrs = 50.0;
 
         instructor.lecture(students, 50.0);
         double expected = students[0].getTotalStudyTime();
        double actual = 12.5; // numOfHrs instructor taught / # of students taught so 50/4 = 12.5
 
 
-        Assert.assertEquals(expected, actual, 0.0);
+        Assert.assertEquals(expected, actual, 0.01);
     }
 }

src/test/java/io/zipcoder/interfaces/TestInstructors.java

+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestInstructors {
+
+    @Test
+    public void getInstance(){
+        Instructors instructors1 = Instructors.getInstance();
+        Instructors instructors2 = Instructors.getInstance();
+
+        Assert.assertEquals(instructors1,instructors2);
+    }
+
+    @Test
+    public void theInitializationSetupStudents(){
+        Instructors instructors1 = Instructors.getInstance();
+        int expected = 4;
+        int actual = instructors1.getArray().length;
+        Assert.assertEquals(expected,actual);
+
+    }
+}

src/test/java/io/zipcoder/interfaces/TestPeople.java

+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestPeople {
+
+    Person person1,person2;
+    Student student1;
+    Instructor instructor;
+    Students students;
+    Instructors instructors;
+
+    public TestPeople() {
+        students = Students.getInstance();
+        person1 = new Person("person1", 45);
+        person2 = new Person("person2", 55);
+        student1 = new Student("student1", 50);
+        instructor = new Instructor("instructor1", 54);
+        students.add(student1);
+    }
+
+    @Test
+    public void testAdd(){
+        //Given
+        Student newStudent = new Student("student2", 42);
+
+        //When
+        Integer expected = 41;
+        students.add(newStudent);
+        Integer actual = students.getCount();
+
+        //Then
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testFindById(){
+        //When
+        long expected = student1.getId();
+        Student actual = students.findById(50);
+
+        //Then
+        Assert.assertEquals(expected,actual.getId());
+    }
+
+    @Test
+    public void testRemoveTest(){
+        //When
+        Integer expected = 42;
+        students.removeById(50);
+        Integer actual = students.getCount();
+
+        //Then
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testRemoveAll(){
+        //Given
+        Instructors instructors = Instructors.getInstance();
+
+        //When
+        Integer expected = 4;
+        instructors.removeAll();
+        Integer actual = instructors.getCount();
+
+        //Then
+        Assert.assertEquals(expected,actual);
+
+    }
+
+
+
+}

src/test/java/io/zipcoder/interfaces/TestPerson.java

 
 public class TestPerson {
 
-    Person person = new Person(1, "Nancy");
+    Person person = new Person("Nancy",1 );
 
     @Test
     public void testConstructor() {
     @Test
     public void testSetAndGetName() {
 
-        String expected = "Robin";
+        String expected = "Nancy";
         person.setName(expected);
 
-
         Assert.assertEquals(expected, person.getName());
 
     }

src/test/java/io/zipcoder/interfaces/TestStudent.java

 import org.junit.Test;
 
 public class TestStudent {
-    Student student = new Student(1, "Nancy");  //creating global new object
+    Student student = new Student("Nancy",1);  //creating global new object
 
     @Test
     public void testImplementation() {

src/test/java/io/zipcoder/interfaces/TestStudents.java

+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestStudents {
+
+    @Test
+    public void getInstance(){
+        Students student =  Students.getInstance();
+        Students student1 =  Students.getInstance();
+
+        Assert.assertEquals(student,student1);
+    }
+
+    @Test
+    public void theInitializationSetupStudents(){
+        Students student = Students.getInstance();
+        int expected = 43;
+        int actual = student.getArray().length;
+        Assert.assertEquals(expected,actual);
+    }
+}

src/test/java/io/zipcoder/interfaces/TestZipCodeWilmington.java

+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestZipCodeWilmington {
+
+    @Test
+    public void hostLecture(){
+        ZipcodeWilmington zcw = ZipcodeWilmington.getInstance();
+        Instructor instructor = zcw.getInstructors().getArray()[0];
+        zcw.hostLecture(instructor, 39);
+        double expected = 2;
+        double actual = zcw.getStudents().getArray()[0].getTotalStudyTime();
+
+        Assert.assertEquals(expected,actual, .1);
+        }
+
+    @Test
+    public void hostLectureById(){
+        ZipcodeWilmington zcw = ZipcodeWilmington.getInstance();
+        Instructor instructor = zcw.getInstructors().getArray()[0];
+        zcw.hostLecture(instructor.getId(),39);
+        double expected = 1;
+        double actual = zcw.getStudents().getArray()[0].getTotalStudyTime();
+
+        Assert.assertEquals(expected,actual,.1);
+
+    }
+}