diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /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="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c9ee3fe..424a188 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,7 +1,9 @@
 <?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="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
+    </list>
     <ignored path="$PROJECT_DIR$/out/" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="TRACKING_ENABLED" value="true" />
@@ -98,8 +100,8 @@
       <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" />
+            <state relative-caret-position="135">
+              <caret line="13" column="30" lean-forward="false" selection-start-line="13" selection-start-column="30" selection-end-line="13" selection-end-column="30" />
               <folding>
                 <element signature="imports" expanded="true" />
                 <element signature="e#197#206#0" expanded="true" />
@@ -140,6 +142,9 @@
       </list>
     </option>
   </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
   <component name="GradleLocalSettings">
     <option name="externalProjectsViewState">
       <projects_view />
@@ -163,6 +168,7 @@
     <option name="width" value="1280" />
     <option name="height" value="650" />
   </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
   <component name="ProjectView">
     <navigator currentView="ProjectPane" proportions="" version="1">
       <flattenPackages />
@@ -186,11 +192,6 @@
               <item name="project8" type="b2602c69:ProjectViewProjectNode" />
               <item name="project8" type="462c0819:PsiDirectoryNode" />
             </path>
-            <path>
-              <item name="project8" type="b2602c69:ProjectViewProjectNode" />
-              <item name="project8" type="462c0819:PsiDirectoryNode" />
-              <item name="src" type="462c0819:PsiDirectoryNode" />
-            </path>
           </expand>
           <select />
         </subPane>
@@ -424,7 +425,6 @@
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="23" width="1280" height="650" extended-state="1" />
-    <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" />
@@ -434,9 +434,9 @@
       <window_info id="Capture Analysis" 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="Event Log" 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="true" content_ui="tabs" />
       <window_info id="Maven Projects" 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="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.35986158" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
-      <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="false" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
-      <window_info id="Terminal" 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="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.35986158" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
+      <window_info id="Version Control" 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="Terminal" active="true" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.32871974" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
       <window_info id="Capture Tool" active="false" anchor="left" 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="Designer" active="false" anchor="left" 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="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" />
@@ -501,12 +501,6 @@
           <properties />
           <option name="timeStamp" value="8" />
         </line-breakpoint>
-        <line-breakpoint enabled="true" type="java-line">
-          <url>file://$PROJECT_DIR$/src/arraylist/example/UseOfArrayList.java</url>
-          <line>12</line>
-          <properties />
-          <option name="timeStamp" value="11" />
-        </line-breakpoint>
       </breakpoints>
       <option name="time" value="12" />
     </breakpoint-manager>
@@ -639,8 +633,8 @@
     </entry>
     <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" />
+        <state relative-caret-position="135">
+          <caret line="13" column="30" lean-forward="false" selection-start-line="13" selection-start-column="30" selection-end-line="13" selection-end-column="30" />
           <folding>
             <element signature="imports" expanded="true" />
             <element signature="e#197#206#0" expanded="true" />
diff --git a/08-25-18-class-notes b/08-25-18-class-notes
new file mode 100644
index 0000000..ab49c98
--- /dev/null
+++ b/08-25-18-class-notes
@@ -0,0 +1,20 @@
+08-25-18 class notes
+
+finalize():  to destroy object; called by garbage collector.
+Singleton:
+
+Make constructor private
+Singleton patter helps to keep only one instance os a class at a time.
+
+String API:
+
+Iterator
+
+For each loop
+
+ArrayList
+
+Git Branch
+
+
+