starting my treeMap

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

 package com.zipcodewilmington.phonebook;
+import java.util.TreeMap;
+import java.util.Set;
+import java.util.Iterator;
+import java.util.Map;
 
 /**
  * Created by leon on 1/23/18.
  */
 public class PhoneBook {
+    //instance variable
+    private TreeMap<String, String> treeMap;
+
+    // void "no arguments" constructor -creates empty map
+    public PhoneBook() {
+        this.treeMap= new TreeMap<String, String>();
+    }
+
+    // single argument constructor -type Map -creates new map w/ same key/value mappings as argument
+    public PhoneBook(TreeMap treeMap) {
+        this.treeMap = treeMap;
+    }
+
+    //add a name & number entry
+    public void addNameNumberEntry(String name, String number) {
+        treeMap.put(name, number);
+    }
+
+    //remove a name & number entry
+    public void removeEntry(String name) {
+        treeMap.remove(name);
+    }
+
+    //find phone number lookup by name
+    public String lookupByName(String name) {
+         return treeMap.get(name);
+    }
+
+    //print out all of the entries in PhoneBook
+    public Set<Map.Entry<String,String>> printOutPhoneBook() {
+        return treeMap.entrySet();
+    }
+
+
+
 }

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

  * Created by leon on 1/23/18.
  */
 public class PhoneBookTest {
+
 }