diff --git a/.idea/misc.xml b/.idea/misc.xml
index 60024e7..0548357 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="8.0" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c9ee3fe..387d258 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,118 +1,43 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="07a63a3d-a3c0-4ff2-8e6e-5bad6500bec1" name="Default" comment="" />
+    <list default="true" id="07a63a3d-a3c0-4ff2-8e6e-5bad6500bec1" name="Default" comment="">
+      <change beforePath="$PROJECT_DIR$/src/arraylist/example/UseOfIterator.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/arraylist/example/UseOfIterator.java" afterDir="false" />
+    </list>
     <ignored path="$PROJECT_DIR$/out/" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
-    <option name="TRACKING_ENABLED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
+  <component name="FUSProjectUsageTrigger">
+    <session id="-674582832">
+      <usages-collector id="statistics.lifecycle.project">
+        <counts>
+          <entry key="project.open.time.0" value="1" />
+          <entry key="project.opened" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.extensions.edit">
+        <counts>
+          <entry key="java" value="41" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.edit">
+        <counts>
+          <entry key="JAVA" value="41" />
+        </counts>
+      </usages-collector>
+    </session>
+  </component>
   <component name="FileEditorManager">
     <leaf>
-      <file leaf-file-name="TestFinalize.java" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/finalize/example/TestFinalize.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="181">
-              <caret line="9" column="61" lean-forward="true" selection-start-line="9" selection-start-column="61" selection-end-line="9" selection-end-column="61" />
-              <folding>
-                <element signature="e#414#415#0" expanded="true" />
-                <element signature="e#486#487#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="House.java" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/singleton/example/House.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="264">
-              <caret line="12" column="30" lean-forward="true" selection-start-line="12" selection-start-column="30" selection-end-line="12" selection-end-column="30" />
-              <folding>
-                <element signature="imports" expanded="true" />
-                <element signature="e#274#281#0" expanded="true" />
-                <element signature="e#459#460#0" expanded="true" />
-                <element signature="e#507#508#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="NestedLoop.java" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/nested/loop/NestedLoop.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="220">
-              <caret line="10" column="0" lean-forward="true" selection-start-line="10" selection-start-column="0" selection-end-line="10" selection-end-column="0" />
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="ArrayList.java" pinned="false" current-in-tab="false">
-        <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/util/ArrayList.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="193">
-              <caret line="357" column="21" lean-forward="true" selection-start-line="357" selection-start-column="21" selection-end-line="357" selection-end-column="21" />
-              <folding>
-                <element signature="e#6283#6284#0" expanded="true" />
-                <element signature="e#6351#6352#0" expanded="true" />
-                <element signature="e#31011#31012#0" expanded="true" />
-                <element signature="e#31043#31044#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="String.java" pinned="false" current-in-tab="false">
-        <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/String.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="-4584">
-              <caret line="333" column="27" lean-forward="true" selection-start-line="333" selection-start-column="27" selection-end-line="333" selection-end-column="27" />
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="List.java" pinned="false" current-in-tab="false">
-        <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/util/List.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="120">
-              <caret line="110" column="17" lean-forward="false" selection-start-line="110" selection-start-column="17" selection-end-line="110" selection-end-column="17" />
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="TestHouse.java" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/singleton/example/TestHouse.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="154">
-              <caret line="7" column="33" lean-forward="false" selection-start-line="7" selection-start-column="29" selection-end-line="7" selection-end-column="41" />
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="UseOfArrayList.java" pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/src/arraylist/example/UseOfArrayList.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="182">
-              <caret line="14" column="9" lean-forward="false" selection-start-line="14" selection-start-column="9" selection-end-line="14" selection-end-column="9" />
-              <folding>
-                <element signature="imports" expanded="true" />
-                <element signature="e#197#206#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="UseOfIterator.java" pinned="false" current-in-tab="false">
+      <file pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/arraylist/example/UseOfIterator.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="139">
-              <caret line="12" column="0" lean-forward="true" selection-start-line="12" selection-start-column="0" selection-end-line="12" selection-end-column="0" />
+            <state relative-caret-position="243">
+              <caret line="12" column="58" selection-start-line="12" selection-start-column="58" selection-end-line="12" selection-end-column="58" />
               <folding>
                 <element signature="imports" expanded="true" />
                 <element signature="e#223#232#0" expanded="true" />
@@ -121,16 +46,6 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="Integer.java" pinned="false" current-in-tab="false">
-        <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/Integer.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="115">
-              <caret line="830" column="0" lean-forward="false" selection-start-line="830" selection-start-column="0" selection-end-line="830" selection-end-column="0" />
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
     </leaf>
   </component>
   <component name="FileTemplateManagerImpl">
@@ -140,10 +55,8 @@
       </list>
     </option>
   </component>
-  <component name="GradleLocalSettings">
-    <option name="externalProjectsViewState">
-      <projects_view />
-    </option>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
@@ -153,53 +66,52 @@
         <option value="$PROJECT_DIR$/src/singleton/example/TestHouse.java" />
         <option value="$PROJECT_DIR$/src/string/example/UseOfString.java" />
         <option value="$PROJECT_DIR$/src/nested/loop/NestedLoop.java" />
-        <option value="$PROJECT_DIR$/src/arraylist/example/UseOfIterator.java" />
         <option value="$PROJECT_DIR$/src/arraylist/example/UseOfArrayList.java" />
+        <option value="$PROJECT_DIR$/src/arraylist/example/UseOfIterator.java" />
       </list>
     </option>
   </component>
-  <component name="ProjectFrameBounds" extendedState="1">
-    <option name="y" value="23" />
-    <option name="width" value="1280" />
-    <option name="height" value="650" />
+  <component name="ProjectFrameBounds" extendedState="6">
+    <option name="y" value="22" />
+    <option name="width" value="1281" />
+    <option name="height" value="651" />
   </component>
   <component name="ProjectView">
-    <navigator currentView="ProjectPane" proportions="" version="1">
-      <flattenPackages />
-      <showMembers />
-      <showModules />
-      <showLibraryContents />
-      <hideEmptyPackages />
-      <abbreviatePackageNames />
-      <autoscrollToSource />
-      <autoscrollFromSource />
-      <sortByType />
-      <manualOrder />
+    <navigator proportions="" version="1">
+      <autoscrollFromSource ProjectPane="true" />
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
-      <pane id="PackagesPane" />
+      <pane id="AndroidView" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
             <path>
-              <item name="project8" type="b2602c69:ProjectViewProjectNode" />
-              <item name="project8" type="462c0819:PsiDirectoryNode" />
+              <item name="CoreJavaDay8" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CoreJavaDay8" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="CoreJavaDay8" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CoreJavaDay8" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
             </path>
             <path>
-              <item name="project8" type="b2602c69:ProjectViewProjectNode" />
-              <item name="project8" type="462c0819:PsiDirectoryNode" />
+              <item name="CoreJavaDay8" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CoreJavaDay8" type="462c0819:PsiDirectoryNode" />
               <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="example" type="462c0819:PsiDirectoryNode" />
             </path>
           </expand>
           <select />
         </subPane>
       </pane>
-      <pane id="AndroidView" />
-      <pane id="Scratches" />
+      <pane id="PackagesPane" />
       <pane id="Scope" />
     </panes>
   </component>
+  <component name="PropertiesComponent">
+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
+  </component>
   <component name="RunDashboard">
     <option name="ruleStates">
       <list>
@@ -214,201 +126,127 @@
   </component>
   <component name="RunManager" selected="Application.UseOfIterator">
     <configuration default="true" type="Applet" factoryName="Applet">
-      <option name="HTML_USED" value="false" />
-      <option name="WIDTH" value="400" />
-      <option name="HEIGHT" value="300" />
       <option name="POLICY_FILE" value="$APPLICATION_HOME_DIR$/bin/appletviewer.policy" />
-      <module />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration name="NestedLoop" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea">
+      <option name="MAIN_CLASS_NAME" value="nested.loop.NestedLoop" />
+      <module name="project8" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <extension name="coverage">
         <pattern>
           <option name="PATTERN" value="nested.loop.*" />
           <option name="ENABLED" value="true" />
         </pattern>
       </extension>
-      <option name="MAIN_CLASS_NAME" value="nested.loop.NestedLoop" />
-      <option name="VM_PARAMETERS" />
-      <option name="PROGRAM_PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="project8" />
-      <envs />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration name="TestHouse" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea">
+      <option name="MAIN_CLASS_NAME" value="singleton.example.TestHouse" />
+      <module name="project8" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <extension name="coverage">
         <pattern>
           <option name="PATTERN" value="singleton.example.*" />
           <option name="ENABLED" value="true" />
         </pattern>
       </extension>
-      <option name="MAIN_CLASS_NAME" value="singleton.example.TestHouse" />
-      <option name="VM_PARAMETERS" />
-      <option name="PROGRAM_PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="project8" />
-      <envs />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration name="UseOfArrayList" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea">
+      <option name="MAIN_CLASS_NAME" value="arraylist.example.UseOfArrayList" />
+      <module name="project8" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <extension name="coverage">
         <pattern>
           <option name="PATTERN" value="arraylist.example.*" />
           <option name="ENABLED" value="true" />
         </pattern>
       </extension>
-      <option name="MAIN_CLASS_NAME" value="arraylist.example.UseOfArrayList" />
-      <option name="VM_PARAMETERS" />
-      <option name="PROGRAM_PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="project8" />
-      <envs />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration name="UseOfIterator" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea">
+      <option name="MAIN_CLASS_NAME" value="arraylist.example.UseOfIterator" />
+      <module name="project8" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <extension name="coverage">
         <pattern>
           <option name="PATTERN" value="arraylist.example.*" />
           <option name="ENABLED" value="true" />
         </pattern>
       </extension>
-      <option name="MAIN_CLASS_NAME" value="arraylist.example.UseOfIterator" />
-      <option name="VM_PARAMETERS" />
-      <option name="PROGRAM_PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="project8" />
-      <envs />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration name="UseOfString" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea">
+      <option name="MAIN_CLASS_NAME" value="string.example.UseOfString" />
+      <module name="project8" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <extension name="coverage">
         <pattern>
           <option name="PATTERN" value="string.example.*" />
           <option name="ENABLED" value="true" />
         </pattern>
       </extension>
-      <option name="MAIN_CLASS_NAME" value="string.example.UseOfString" />
-      <option name="VM_PARAMETERS" />
-      <option name="PROGRAM_PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="project8" />
-      <envs />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration default="true" type="Application" factoryName="Application">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <option name="MAIN_CLASS_NAME" />
-      <option name="VM_PARAMETERS" />
-      <option name="PROGRAM_PARAMETERS" />
       <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="" />
-      <envs />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration default="true" type="JUnit" factoryName="JUnit">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <module name="" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="PACKAGE_NAME" />
-      <option name="MAIN_CLASS_NAME" />
-      <option name="METHOD_NAME" />
-      <option name="TEST_OBJECT" value="class" />
-      <option name="VM_PARAMETERS" value="-ea" />
-      <option name="PARAMETERS" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <option name="TEST_SEARCH_SCOPE">
-        <value defaultName="singleModule" />
-      </option>
-      <envs />
-      <patterns />
-    </configuration>
-    <configuration default="true" type="Remote" factoryName="Remote">
-      <option name="USE_SOCKET_TRANSPORT" value="true" />
-      <option name="SERVER_MODE" value="false" />
-      <option name="SHMEM_ADDRESS" value="javadebug" />
-      <option name="HOST" value="localhost" />
-      <option name="PORT" value="5005" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration default="true" type="TestNG" factoryName="TestNG">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <module name="" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="SUITE_NAME" />
-      <option name="PACKAGE_NAME" />
-      <option name="MAIN_CLASS_NAME" />
-      <option name="METHOD_NAME" />
-      <option name="GROUP_NAME" />
-      <option name="TEST_OBJECT" value="CLASS" />
-      <option name="VM_PARAMETERS" value="-ea" />
-      <option name="PARAMETERS" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
-      <option name="OUTPUT_DIRECTORY" />
-      <option name="ANNOTATION_TYPE" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <option name="TEST_SEARCH_SCOPE">
-        <value defaultName="singleModule" />
-      </option>
-      <option name="USE_DEFAULT_REPORTERS" value="false" />
-      <option name="PROPERTIES_FILE" />
-      <envs />
       <properties />
       <listeners />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
     <configuration default="true" type="#org.jetbrains.idea.devkit.run.PluginConfigurationType" factoryName="Plugin">
       <module name="" />
       <option name="VM_PARAMETERS" value="-Xmx512m -Xms256m -XX:MaxPermSize=250m -ea" />
       <option name="PROGRAM_PARAMETERS" />
       <predefined_log_file id="idea.log" enabled="true" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
     </configuration>
-    <list size="5">
-      <item index="0" class="java.lang.String" itemvalue="Application.TestHouse" />
-      <item index="1" class="java.lang.String" itemvalue="Application.UseOfString" />
-      <item index="2" class="java.lang.String" itemvalue="Application.NestedLoop" />
-      <item index="3" class="java.lang.String" itemvalue="Application.UseOfArrayList" />
-      <item index="4" class="java.lang.String" itemvalue="Application.UseOfIterator" />
+    <list>
+      <item itemvalue="Application.TestHouse" />
+      <item itemvalue="Application.UseOfString" />
+      <item itemvalue="Application.NestedLoop" />
+      <item itemvalue="Application.UseOfArrayList" />
+      <item itemvalue="Application.UseOfIterator" />
     </list>
     <recent_temporary>
-      <list size="5">
-        <item index="0" class="java.lang.String" itemvalue="Application.UseOfIterator" />
-        <item index="1" class="java.lang.String" itemvalue="Application.UseOfArrayList" />
-        <item index="2" class="java.lang.String" itemvalue="Application.NestedLoop" />
-        <item index="3" class="java.lang.String" itemvalue="Application.TestHouse" />
-        <item index="4" class="java.lang.String" itemvalue="Application.UseOfString" />
+      <list>
+        <item itemvalue="Application.UseOfIterator" />
+        <item itemvalue="Application.UseOfArrayList" />
+        <item itemvalue="Application.NestedLoop" />
+        <item itemvalue="Application.TestHouse" />
+        <item itemvalue="Application.UseOfString" />
       </list>
     </recent_temporary>
   </component>
-  <component name="ShelveChangesManager" show_recycled="false">
-    <option name="remove_strategy" value="false" />
-  </component>
   <component name="SvnConfiguration">
     <configuration />
   </component>
@@ -423,35 +261,35 @@
     <servers />
   </component>
   <component name="ToolWindowManager">
-    <frame x="0" y="23" width="1280" height="650" extended-state="1" />
+    <frame x="-7" y="-7" width="1295" height="695" extended-state="6" />
     <editor active="true" />
     <layout>
-      <window_info id="Palette" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
-      <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
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-      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
-      <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
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-      <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.39965397" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
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-      <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
-      <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
-      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
-      <window_info id="Inspection" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.16518219" />
+      <window_info id="Structure" order="1" weight="0.25" />
+      <window_info id="Designer" order="2" />
+      <window_info id="Image Layers" order="3" />
+      <window_info id="Capture Tool" order="4" />
+      <window_info id="UI Designer" order="5" />
+      <window_info id="Favorites" order="6" side_tool="true" />
+      <window_info anchor="bottom" id="Message" order="0" />
+      <window_info anchor="bottom" id="Find" order="1" />
+      <window_info anchor="bottom" id="Run" order="2" visible="true" weight="0.35986158" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.39965397" />
+      <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
+      <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
+      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info active="true" anchor="bottom" id="Terminal" order="7" visible="true" weight="0.32962963" />
+      <window_info anchor="bottom" id="Event Log" order="8" side_tool="true" />
+      <window_info anchor="bottom" id="Version Control" order="9" />
+      <window_info anchor="bottom" id="Messages" order="10" />
+      <window_info anchor="right" id="Commander" order="0" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
+      <window_info anchor="right" id="Palette" order="3" />
+      <window_info anchor="right" id="Capture Analysis" order="4" />
+      <window_info anchor="right" id="Theme Preview" order="5" />
+      <window_info anchor="right" id="Palette&#9;" order="6" />
+      <window_info anchor="right" id="Maven Projects" order="7" />
     </layout>
   </component>
   <component name="VcsContentAnnotationSettings">
@@ -508,35 +346,27 @@
           <option name="timeStamp" value="11" />
         </line-breakpoint>
       </breakpoints>
-      <option name="time" value="12" />
     </breakpoint-manager>
-    <watches-manager />
   </component>
   <component name="editorHistoryManager">
-    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/Runtime.java">
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-          <caret line="57" column="0" lean-forward="false" selection-start-line="57" selection-start-column="0" selection-end-line="57" selection-end-column="0" />
-          <folding>
-            <element signature="e#1309#1310#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
-    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/System.java">
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/Runtime.java" />
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/System.java" />
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/ClassLoader.java" />
+    <entry file="file://$PROJECT_DIR$/src/string/example/UseOfString.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="121">
-          <caret line="993" column="0" lean-forward="false" selection-start-line="993" selection-start-column="0" selection-end-line="993" selection-end-column="0" />
-          <folding>
-            <element signature="e#40917#40918#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="22">
+          <caret line="4" lean-forward="true" selection-start-line="4" selection-end-line="4" />
         </state>
       </provider>
     </entry>
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/util/List.java" />
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/String.java" />
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/Integer.java" />
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/util/ArrayList.java" />
     <entry file="file://$PROJECT_DIR$/src/finalize/example/TestFinalize.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="181">
-          <caret line="9" column="61" lean-forward="true" selection-start-line="9" selection-start-column="61" selection-end-line="9" selection-end-column="61" />
+        <state relative-caret-position="189">
+          <caret line="9" column="20" lean-forward="true" selection-start-line="9" selection-start-column="20" selection-end-line="9" selection-end-column="20" />
           <folding>
             <element signature="e#414#415#0" expanded="true" />
             <element signature="e#486#487#0" expanded="true" />
@@ -544,21 +374,12 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/singleton/example/TestHouse.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="154">
-          <caret line="7" column="33" lean-forward="false" selection-start-line="7" selection-start-column="29" selection-end-line="7" selection-end-column="41" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/src/singleton/example/House.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="264">
+        <state relative-caret-position="231">
           <caret line="12" column="30" lean-forward="true" selection-start-line="12" selection-start-column="30" selection-end-line="12" selection-end-column="30" />
           <folding>
             <element signature="imports" expanded="true" />
-            <element signature="e#274#281#0" expanded="true" />
             <element signature="e#459#460#0" expanded="true" />
             <element signature="e#507#508#0" expanded="true" />
           </folding>
@@ -567,69 +388,33 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/nested/loop/NestedLoop.java">
       <provider selected="true" editor-type-id="text-editor">
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-          <folding />
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-      </provider>
-    </entry>
-    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/ClassLoader.java">
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-          <folding />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/src/string/example/UseOfString.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="22">
-          <caret line="4" column="0" lean-forward="true" selection-start-line="4" selection-start-column="0" selection-end-line="4" selection-end-column="0" />
-          <folding />
+        <state relative-caret-position="210">
+          <caret line="10" selection-start-line="10" selection-end-line="10" />
         </state>
       </provider>
     </entry>
-    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/util/List.java">
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-          <folding />
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-      </provider>
-    </entry>
-    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/lang/Integer.java">
+    <entry file="file://$PROJECT_DIR$/src/singleton/example/TestHouse.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="115">
-          <caret line="830" column="0" lean-forward="false" selection-start-line="830" selection-start-column="0" selection-end-line="830" selection-end-column="0" />
-          <folding />
+        <state relative-caret-position="147">
+          <caret line="7" column="33" selection-start-line="7" selection-start-column="29" selection-end-line="7" selection-end-column="41" />
         </state>
       </provider>
     </entry>
-    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/src.zip!/java/util/ArrayList.java">
+    <entry file="file://$PROJECT_DIR$/src/arraylist/example/UseOfArrayList.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="193">
-          <caret line="357" column="21" lean-forward="true" selection-start-line="357" selection-start-column="21" selection-end-line="357" selection-end-column="21" />
+        <state relative-caret-position="273">
+          <caret line="14" column="9" selection-start-line="14" selection-start-column="9" selection-end-line="14" selection-end-column="9" />
           <folding>
-            <element signature="e#6283#6284#0" expanded="true" />
-            <element signature="e#6351#6352#0" expanded="true" />
-            <element signature="e#31011#31012#0" expanded="true" />
-            <element signature="e#31043#31044#0" expanded="true" />
+            <element signature="imports" expanded="true" />
+            <element signature="e#197#206#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/arraylist/example/UseOfIterator.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="139">
-          <caret line="12" column="0" lean-forward="true" selection-start-line="12" selection-start-column="0" selection-end-line="12" selection-end-column="0" />
+        <state relative-caret-position="243">
+          <caret line="12" column="58" selection-start-line="12" selection-start-column="58" selection-end-line="12" selection-end-column="58" />
           <folding>
             <element signature="imports" expanded="true" />
             <element signature="e#223#232#0" expanded="true" />
@@ -637,16 +422,5 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/arraylist/example/UseOfArrayList.java">
-      <provider selected="true" editor-type-id="text-editor">
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-          <caret line="14" column="9" lean-forward="false" selection-start-line="14" selection-start-column="9" selection-end-line="14" selection-end-column="9" />
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-            <element signature="imports" expanded="true" />
-            <element signature="e#197#206#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
   </component>
 </project>
\ No newline at end of file
diff --git a/src/arraylist/example/UseOfIterator.java b/src/arraylist/example/UseOfIterator.java
index a3a9302..2f2919a 100644
--- a/src/arraylist/example/UseOfIterator.java
+++ b/src/arraylist/example/UseOfIterator.java
@@ -10,6 +10,7 @@ public static void main(String[] args) {
         list.add(10);
         list.add(15);
         list.add(25);
+        System.out.println("I succesfully enhanced my code");
 
         Iterator it = list.iterator();
         while(it.hasNext()){