completed this lab

.idea/workspace.xml

@@ -2,10 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="6a8e162c-afd9-4415-8c4f-40bb1a6f9e53" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/src/main/java/MyArrayList.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/MySet.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/MyArrayListTest.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/MySetTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/MySet.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/MySet.java" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/target/" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
@@ -24,24 +21,24 @@
       </usages-collector>
       <usages-collector id="statistics.file.extensions.open">
         <counts>
-          <entry key="class" value="1" />
+          <entry key="class" value="12" />
           <entry key="java" value="5" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.open">
         <counts>
-          <entry key="CLASS" value="1" />
+          <entry key="CLASS" value="12" />
           <entry key="JAVA" value="5" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.edit">
         <counts>
-          <entry key="java" value="2576" />
+          <entry key="java" value="2687" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
-          <entry key="JAVA" value="2576" />
+          <entry key="JAVA" value="2687" />
         </counts>
       </usages-collector>
     </session>
@@ -71,8 +68,8 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/test/java/MyArrayListTest.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="322">
-              <caret line="91" column="1" lean-forward="true" selection-end-line="91" selection-end-column="1" />
+            <state relative-caret-position="150">
+              <caret line="10" lean-forward="true" selection-start-line="10" selection-end-line="10" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -83,8 +80,8 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/main/java/MySet.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="183">
-              <caret line="19" selection-start-line="19" selection-end-line="19" />
+            <state relative-caret-position="123">
+              <caret line="76" selection-start-line="76" selection-end-line="76" />
               <folding>
                 <element signature="e#131#132#0" expanded="true" />
                 <element signature="e#175#176#0" expanded="true" />
@@ -92,21 +89,27 @@
                 <element signature="e#258#259#0" expanded="true" />
                 <element signature="e#1625#1626#0" expanded="true" />
                 <element signature="e#1718#1719#0" expanded="true" />
-                <element signature="e#2068#2069#0" expanded="true" />
-                <element signature="e#2106#2107#0" expanded="true" />
+                <element signature="e#2123#2124#0" expanded="true" />
+                <element signature="e#2161#2162#0" expanded="true" />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/src/test/java/MySetTest.java">
+        <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/internal/runners/model/ReflectiveCallable.class">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="1290">
-              <caret line="86" selection-start-line="86" selection-end-line="86" />
-              <folding>
-                <element signature="imports" expanded="true" />
-              </folding>
+            <state relative-caret-position="210">
+              <caret line="17" selection-start-line="17" selection-end-line="17" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/runners/ParentRunner.class">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="99">
+              <caret line="202" selection-start-line="202" selection-end-line="202" />
             </state>
           </provider>
         </entry>
@@ -242,7 +245,7 @@
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1542167013031" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1542227780702" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
     <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
     <property name="nodejs_npm_path_reset_for_default_project" value="true" />
@@ -278,48 +281,48 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="MyArrayListTest.testRemove2" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="MyArrayListTest.testSet" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="generics" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="MyArrayListTest" />
-      <option name="METHOD_NAME" value="testRemove2" />
+      <option name="METHOD_NAME" value="testSet" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="MyArrayListTest.testSet" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="MySetTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="generics" />
       <option name="PACKAGE_NAME" value="" />
-      <option name="MAIN_CLASS_NAME" value="MyArrayListTest" />
-      <option name="METHOD_NAME" value="testSet" />
-      <option name="TEST_OBJECT" value="method" />
+      <option name="MAIN_CLASS_NAME" value="MySetTest" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="MySetTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="MySetTest.testAddAtIndex" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="generics" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="MySetTest" />
+      <option name="METHOD_NAME" value="testAddAtIndex" />
+      <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
     <list>
       <item itemvalue="JUnit.MyArrayListTest" />
-      <item itemvalue="JUnit.MyArrayListTest.testRemove2" />
       <item itemvalue="JUnit.MyArrayListTest.testSet" />
       <item itemvalue="JUnit.MyArrayListTest.testAddAtIndex" />
       <item itemvalue="JUnit.MySetTest" />
+      <item itemvalue="JUnit.MySetTest.testAddAtIndex" />
     </list>
     <recent_temporary>
       <list>
         <item itemvalue="JUnit.MySetTest" />
+        <item itemvalue="JUnit.MySetTest.testAddAtIndex" />
         <item itemvalue="JUnit.MyArrayListTest.testAddAtIndex" />
         <item itemvalue="JUnit.MyArrayListTest" />
         <item itemvalue="JUnit.MyArrayListTest.testSet" />
-        <item itemvalue="JUnit.MyArrayListTest.testRemove2" />
       </list>
     </recent_temporary>
   </component>
@@ -333,48 +336,47 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1542144297867</updated>
-      <workItem from="1542144301266" duration="15755000" />
+      <workItem from="1542144301266" duration="23107000" />
     </task>
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="MyArrayListTest - 2018.11.13 at 21h 55m 32s.xml">
-      <configuration name="MyArrayListTest" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 09h 05m 29s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MyArrayListTest_testAddAtIndex - 2018.11.13 at 22h 03m 47s.xml">
-      <configuration name="MyArrayListTest.testAddAtIndex" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 14h 49m 10s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MyArrayListTest_testAddAtIndex - 2018.11.13 at 22h 04m 45s.xml">
-      <configuration name="MyArrayListTest.testAddAtIndex" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 14h 49m 56s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MyArrayListTest_testAddAtIndex - 2018.11.13 at 22h 13m 22s.xml">
-      <configuration name="MyArrayListTest.testAddAtIndex" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 14h 51m 01s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MyArrayListTest_testAddAtIndex - 2018.11.13 at 22h 16m 48s.xml">
-      <configuration name="MyArrayListTest.testAddAtIndex" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 14h 52m 14s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MySetTest - 2018.11.13 at 22h 34m 46s.xml">
-      <configuration name="MySetTest" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 14h 54m 05s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MySetTest - 2018.11.13 at 22h 40m 00s.xml">
-      <configuration name="MySetTest" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 15h 26m 58s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MySetTest - 2018.11.13 at 22h 41m 16s.xml">
-      <configuration name="MySetTest" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 15h 34m 37s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MySetTest - 2018.11.13 at 22h 42m 39s.xml">
-      <configuration name="MySetTest" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 15h 34m 47s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="MySetTest - 2018.11.13 at 22h 43m 32s.xml">
-      <configuration name="MySetTest" configurationId="JUnit" />
+    <history-entry file="MySetTest_testAddAtIndex - 2018.11.14 at 15h 35m 23s.xml">
+      <configuration name="MySetTest.testAddAtIndex" configurationId="JUnit" />
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="15755000" />
+    <option name="totallyTimeSpent" value="23107000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="23" width="1280" height="709" extended-state="0" />
-    <editor active="true" />
     <layout>
       <window_info id="Image Layers" />
       <window_info id="Designer" />
@@ -386,7 +388,7 @@
       <window_info anchor="bottom" id="Messages" weight="0.32901135" />
       <window_info anchor="bottom" id="Database Changes" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" show_stripe_button="false" />
-      <window_info anchor="bottom" id="Terminal" />
+      <window_info anchor="bottom" id="Terminal" weight="0.32901135" />
       <window_info anchor="bottom" id="Event Log" side_tool="true" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" weight="0.32901135" />
@@ -447,9 +449,33 @@
       <breakpoints>
         <line-breakpoint enabled="true" type="java-line">
           <url>file://$PROJECT_DIR$/src/main/java/MySet.java</url>
-          <line>76</line>
+          <line>22</line>
+          <properties />
+          <option name="timeStamp" value="4" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="java-line">
+          <url>file://$PROJECT_DIR$/src/main/java/MySet.java</url>
+          <line>24</line>
+          <properties />
+          <option name="timeStamp" value="5" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="java-line">
+          <url>file://$PROJECT_DIR$/src/main/java/MySet.java</url>
+          <line>26</line>
           <properties />
-          <option name="timeStamp" value="2" />
+          <option name="timeStamp" value="7" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="java-line">
+          <url>file://$PROJECT_DIR$/src/main/java/MySet.java</url>
+          <line>29</line>
+          <properties />
+          <option name="timeStamp" value="8" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="java-line">
+          <url>file://$PROJECT_DIR$/src/main/java/MySet.java</url>
+          <line>77</line>
+          <properties />
+          <option name="timeStamp" value="10" />
         </line-breakpoint>
       </breakpoints>
     </breakpoint-manager>
@@ -473,20 +499,58 @@
         </state>
       </provider>
     </entry>
+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/runners/model/FrameworkMethod.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="220">
+          <caret line="56" column="9" lean-forward="true" selection-start-line="56" selection-start-column="9" selection-end-line="56" selection-end-column="9" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/test/java/MyArrayListTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="322">
-          <caret line="91" column="1" lean-forward="true" selection-end-line="91" selection-end-column="1" />
+        <state relative-caret-position="150">
+          <caret line="10" lean-forward="true" selection-start-line="10" selection-end-line="10" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/MySetTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="329">
+          <caret line="30" column="37" lean-forward="true" selection-start-line="30" selection-start-column="37" selection-end-line="30" selection-end-column="37" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/runner/JUnitCore.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="99">
+          <caret line="76" selection-start-line="76" selection-end-line="76" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/runners/BlockJUnit4ClassRunner.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="99">
+          <caret line="49" selection-start-line="49" selection-end-line="49" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/runners/ParentRunner.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="99">
+          <caret line="202" selection-start-line="202" selection-end-line="202" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/main/java/MySet.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="183">
-          <caret line="19" selection-start-line="19" selection-end-line="19" />
+        <state relative-caret-position="123">
+          <caret line="76" selection-start-line="76" selection-end-line="76" />
           <folding>
             <element signature="e#131#132#0" expanded="true" />
             <element signature="e#175#176#0" expanded="true" />
@@ -494,26 +558,16 @@
             <element signature="e#258#259#0" expanded="true" />
             <element signature="e#1625#1626#0" expanded="true" />
             <element signature="e#1718#1719#0" expanded="true" />
-            <element signature="e#2068#2069#0" expanded="true" />
-            <element signature="e#2106#2107#0" expanded="true" />
+            <element signature="e#2123#2124#0" expanded="true" />
+            <element signature="e#2161#2162#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/runners/model/FrameworkMethod.class">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="220">
-          <caret line="56" column="9" lean-forward="true" selection-start-line="56" selection-start-column="9" selection-end-line="56" selection-end-column="9" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/MySetTest.java">
+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/internal/runners/model/ReflectiveCallable.class">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="1290">
-          <caret line="86" selection-start-line="86" selection-end-line="86" />
-          <folding>
-            <element signature="imports" expanded="true" />
-          </folding>
+        <state relative-caret-position="210">
+          <caret line="17" selection-start-line="17" selection-end-line="17" />
         </state>
       </provider>
     </entry>

src/main/java/MySet.java

@@ -73,8 +73,8 @@ public class MySet<E> {
 
     public boolean contains(Object element)
     {
-        for(int i=0; i<set.length; i++){
-            if(set[i].equals(element)) {
+        for(Object o : set) {
+            if(element.equals(o)) {
                 return true;
             }
         }