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PhoneBook.java

- 
+import java.util.*;
 
 /**
  * Created by leon on 1/23/18.
  */
 public class PhoneBook {
+    private String name, phoneNumber;
+    private Map<String, String> entries;
+
+    public PhoneBook(){
+        this.entries = new TreeMap<String, String> ();
+    }
+
+    public void add(String name, String phoneNumber){
+        this.entries.put(name, phoneNumber);
+
+    }
+
+    public void remove(String name){
+        this.entries.remove(name);
+    }
+
+
+    public void display(){
+
+        if (this.entries.isEmpty()) System.out.println("Empty");
+
+        for (Map.Entry<String,String> entry : entries.entrySet()){
+            String key = entry.getKey();
+            String value = entry.getValue();
+
+            System.out.println(key + " " + value);
+        }
+
+    }
+
+    
 }

PhoneBookTest.java

 
-
 import static org.junit.Assert.*;
 import org.junit.After;
 import org.junit.Before;
     public void tearDown()
     {
     }
-}
+
+    @ Test
+    public void Test(){
+        PhoneBook phone = new PhoneBook();
+        phone.add("Zebra", "111-222-333");
+
+    }
+
+    @Test
+    public void Test1(){
+
+        PhoneBook phone1 = new PhoneBook();
+        phone1.add("Cow", "222-333-444");
+        
+    }
+
+}

package.bluej

 #BlueJ package file
-editor.fx.0.height=0
-editor.fx.0.width=0
-editor.fx.0.x=0
-editor.fx.0.y=0
+dependency1.from=PhoneBookTest
+dependency1.to=PhoneBook
+dependency1.type=UsesDependency
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+editor.fx.0.width=800
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+editor.fx.0.y=23
 objectbench.height=101
-objectbench.width=461
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 package.divider.horizontal=0.6
 package.divider.vertical=0.8007380073800738
 package.editor.height=427
 package.editor.y=143
 package.frame.height=600
 package.frame.width=800
-package.numDependencies=0
-package.numTargets=1
+package.numDependencies=1
+package.numTargets=2
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
 readme.width=47
 readme.x=10
 readme.y=10
-
+target1.height=50
+target1.name=PhoneBookTest
+target1.showInterface=false
+target1.type=UnitTestTargetJunit4
+target1.width=100
+target1.x=100
+target1.y=40
+target2.association=PhoneBookTest
+target2.height=50
+target2.name=PhoneBook
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=100
+target2.x=70
+target2.y=70