second iteration. still not done. thanks

src/main/java/com/zipcodewilmington/phonebook/Person.java

 package com.zipcodewilmington.phonebook;
 
 public class Person {
+
+    //variables
+
+    /*we made these private bc we don't want the user to be able to change the data. Another reason we want to do this
+     is that you want to "hide" how you store the information from the users.
+
+    */
+    private String name;
+    private String phoneNumber;
+
+    //constructor
+    public Person(String name, String number) {
+        this.name= name;
+        this.phoneNumber = number;
+    }
+    //"everything else"
     public String getName() {
         return name;
     }
         this.name = name;
     }
 
-    public String getNumber() {
-        return number;
+    public String getPhoneNumber() {
+        return phoneNumber;
     }
 
-    public void setNumber(String number) {
-        this.number = number;
+    public void setPhoneNumber(String number) {
+        this.phoneNumber = number;
     }
 
-    private String name;
-    private String number;
-
-    public Person(String name, String number) {
-        this.name= name;
-        this.number= number;
-    }
 
 }

src/main/java/com/zipcodewilmington/phonebook/PhoneBook.java

 package com.zipcodewilmington.phonebook;
 
 import java.util.Map;
+import java.util.Set;
 import java.util.TreeMap;
 
 public class PhoneBook {
+
+    //the below defines what kind of attribute you have, which in this case is your "contacts"
     Map<String, Person> personMap;
 
+    //this is your constructor. whenever you see public + the classname, that is your constructor
+    //
+    // (this phoneBook constructor is like the "cover" of your phonebook (the binding and the spine). it creates an empty book.)
+
+    //this can make as many phonebook objects as you want
     public PhoneBook() {
+
+        //when we make our phonebooks, this is the form they will take (below)
+        //
+        // this treeMap initializes the "blank pages of the book". the treemap is the structure of how your book will hold info
+
+        //if you were to not set this, your person map would be null(default setting)
         this.personMap = new TreeMap<String, Person>();
     }
 
+    // this is our method below. it describes what we can do with this phonebook
+
+    //so later, when you call "phonebook.add", that's like someone literally writing a new name and number in your phonebook object
     public void add(String name, String number){
         this.personMap.put(name, new Person(name, number));
     }
 
+    /*
+    //this method would really be better for if you need more information on your person objects (like address, etc).
+
     public void add(Person person){
         this.personMap.put(person.getName(), person);
     }
 
-    public String lookup(String name) {
+    */
+
+    public Person lookup(String name) {
+
+       return personMap.get(name);
 
     }
+
+    public String reverseLookup (String phoneNumber){
+
+        //this will "grab" all the listings in your book. it does NOT print them.
+        Set<Map.Entry<String, Person>> entries = personMap.entrySet();
+
+        for (Map.Entry<String, Person> phoneBookEntry : entries) {
+
+            Person person = phoneBookEntry.getValue();
+
+            if (person.getPhoneNumber().equals(phoneNumber)){
+                return phoneBookEntry.getKey();
+            }
+        }
+
+       return "We're sorry. The requested phone number could not be found. Have fun when you code!!!!!!!!";
+
+    }
+
 }
 

src/test/java/com/zipcodewilmington/phonebook/PhoneBookTest.java

 
 
     @Test
-    public void getName() {
+    public void testLookup() {
 
-        testPhonebook.add(john.getName(), john.getNumber());
+        testPhonebook.add(john.getName(), john.getPhoneNumber());
 
-        String testNumber = "111-555-1234";
-        Assert.assertTrue();
+        Person actualPerson = testPhonebook.lookup(john.getName());
+
+        Assert.assertEquals(john.getPhoneNumber(), actualPerson.getPhoneNumber());
 
     }
+
+}