added generic class

.idea/workspace.xml

@@ -2,8 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="926ad23d-2ddc-41ae-980d-780dcc1811fa" name="Default" comment="">
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/Checkbook/src/main/java/Checkbook.java" beforeDir="false" afterPath="$PROJECT_DIR$/Checkbook/src/main/java/Checkbook.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java" beforeDir="false" afterPath="$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/Checkbook/target/" />
@@ -23,26 +23,28 @@
       </usages-collector>
       <usages-collector id="statistics.file.extensions.open">
         <counts>
+          <entry key="class" value="1" />
           <entry key="iml" value="1" />
-          <entry key="java" value="10" />
+          <entry key="java" value="11" />
           <entry key="md" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.open">
         <counts>
+          <entry key="CLASS" value="1" />
           <entry key="IDEA_MODULE" value="1" />
-          <entry key="JAVA" value="10" />
+          <entry key="JAVA" value="11" />
           <entry key="Markdown" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.edit">
         <counts>
-          <entry key="java" value="1550" />
+          <entry key="java" value="1943" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
-          <entry key="JAVA" value="1550" />
+          <entry key="JAVA" value="1943" />
         </counts>
       </usages-collector>
     </session>
@@ -54,7 +56,7 @@
           <file pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/Transaction.java">
               <provider selected="true" editor-type-id="text-editor">
-                <state relative-caret-position="240">
+                <state relative-caret-position="-169">
                   <caret line="16" column="5" lean-forward="true" selection-start-line="16" selection-start-column="5" selection-end-line="16" selection-end-column="5" />
                   <folding>
                     <element signature="imports" expanded="true" />
@@ -82,12 +84,14 @@
           <file pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/Checkbook.java">
               <provider selected="true" editor-type-id="text-editor">
-                <state relative-caret-position="1215">
-                  <caret line="81" column="4" selection-start-line="81" selection-start-column="4" selection-end-line="81" selection-end-column="4" />
+                <state relative-caret-position="266">
+                  <caret line="93" column="50" selection-start-line="93" selection-start-column="50" selection-end-line="93" selection-end-column="50" />
                   <folding>
                     <element signature="imports" expanded="true" />
                     <element signature="e#185#186#0" expanded="true" />
                     <element signature="e#239#240#0" expanded="true" />
+                    <element signature="e#391#392#0" expanded="true" />
+                    <element signature="e#415#416#0" expanded="true" />
                     <element signature="e#141#142#0" expanded="true" />
                     <element signature="e#170#171#0" expanded="true" />
                     <element signature="e#205#206#0" expanded="true" />
@@ -105,17 +109,21 @@
               </provider>
             </entry>
           </file>
-          <file pinned="false" current-in-tab="true">
+          <file pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java">
               <provider selected="true" editor-type-id="text-editor">
-                <state relative-caret-position="2235">
-                  <caret line="149" column="49" lean-forward="true" selection-start-line="149" selection-start-column="49" selection-end-line="149" selection-end-column="49" />
+                <state relative-caret-position="326">
+                  <caret line="162" column="5" lean-forward="true" selection-start-line="162" selection-start-column="5" selection-end-line="162" selection-end-column="5" />
                   <folding>
                     <element signature="imports" expanded="true" />
                     <element signature="e#1385#1386#0" expanded="true" />
                     <element signature="e#1406#1407#0" expanded="true" />
                     <element signature="e#2852#2853#0" expanded="true" />
                     <element signature="e#2932#2933#0" expanded="true" />
+                    <element signature="e#4437#4438#0" expanded="true" />
+                    <element signature="e#4458#4459#0" expanded="true" />
+                    <element signature="e#4621#4622#0" expanded="true" />
+                    <element signature="e#4685#4686#0" expanded="true" />
                   </folding>
                 </state>
               </provider>
@@ -124,8 +132,20 @@
           <file pinned="false" current-in-tab="false">
             <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/AccountBook.java">
               <provider selected="true" editor-type-id="text-editor">
-                <state relative-caret-position="30">
-                  <caret line="2" column="17" selection-start-line="2" selection-start-column="17" selection-end-line="2" selection-end-column="17" />
+                <state relative-caret-position="165">
+                  <caret line="11" column="1" lean-forward="true" selection-start-line="11" selection-start-column="1" selection-end-line="11" selection-end-column="1" />
+                </state>
+              </provider>
+            </entry>
+          </file>
+          <file pinned="false" current-in-tab="true">
+            <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java">
+              <provider selected="true" editor-type-id="text-editor">
+                <state relative-caret-position="75">
+                  <caret line="5" column="52" selection-start-line="5" selection-start-column="52" selection-end-line="5" selection-end-column="52" />
+                  <folding>
+                    <element signature="e#182#183#0" expanded="true" />
+                  </folding>
                 </state>
               </provider>
             </entry>
@@ -175,11 +195,11 @@
         <option value="$PROJECT_DIR$/Checkbook/src/main/java/Payee.java" />
         <option value="$PROJECT_DIR$/Checkbook/src/main/java/Transaction.java" />
         <option value="$PROJECT_DIR$/Checkbook/src/main/java/AccountBook.java" />
-        <option value="$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java" />
         <option value="$PROJECT_DIR$/Checkbook/src/main/java/TransactionType.java" />
         <option value="$PROJECT_DIR$/README.md" />
-        <option value="$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java" />
         <option value="$PROJECT_DIR$/Checkbook/src/main/java/Checkbook.java" />
+        <option value="$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java" />
+        <option value="$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java" />
       </list>
     </option>
   </component>
@@ -258,7 +278,7 @@
   <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="1544292738352" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1544299508052" />
     <property name="com.intellij.testIntegration.createTest.CreateTestDialog.defaultLibrary" value="JUnit4" />
     <property name="jdk.selected.JAVA_MODULE" value="1.8" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
@@ -288,7 +308,7 @@
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="JUnit.CheckbookTest.getAllDebitTest">
+  <component name="RunManager" selected="JUnit.CheckbookTest">
     <configuration default="true" type="Applet" factoryName="Applet">
       <option name="POLICY_FILE" value="$APPLICATION_HOME_DIR$/bin/appletviewer.policy" />
       <method v="2">
@@ -301,44 +321,42 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="CheckbookTest.checkbookValue" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="CheckbookTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="Checkbook" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
-      <option name="METHOD_NAME" value="checkbookValue" />
-      <option name="TEST_OBJECT" value="method" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="CheckbookTest.getAllDebitTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="CheckbookTest.checkbookValue" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="Checkbook" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
-      <option name="METHOD_NAME" value="getAllDebitTest" />
+      <option name="METHOD_NAME" value="checkbookValue" />
       <option name="TEST_OBJECT" value="method" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="CheckbookTest.getTransactionForPayee" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="CheckbookTest.constructorOneParam" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="Checkbook" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
-      <option name="METHOD_NAME" value="getTransactionForPayee" />
+      <option name="METHOD_NAME" value="constructorOneParam" />
       <option name="TEST_OBJECT" value="method" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="CheckbookTest.getTransactionsForDateTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="CheckbookTest.getAllCreditTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="Checkbook" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
-      <option name="METHOD_NAME" value="getTransactionsForDateTest" />
+      <option name="METHOD_NAME" value="getAllCreditTest" />
       <option name="TEST_OBJECT" value="method" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
       <method v="2">
@@ -381,17 +399,17 @@
     </configuration>
     <list>
       <item itemvalue="JUnit.CheckbookTest.toArrayparam2test" />
+      <item itemvalue="JUnit.CheckbookTest.constructorOneParam" />
+      <item itemvalue="JUnit.CheckbookTest" />
+      <item itemvalue="JUnit.CheckbookTest.getAllCreditTest" />
       <item itemvalue="JUnit.CheckbookTest.checkbookValue" />
-      <item itemvalue="JUnit.CheckbookTest.getTransactionsForDateTest" />
-      <item itemvalue="JUnit.CheckbookTest.getTransactionForPayee" />
-      <item itemvalue="JUnit.CheckbookTest.getAllDebitTest" />
     </list>
     <recent_temporary>
       <list>
-        <item itemvalue="JUnit.CheckbookTest.getAllDebitTest" />
-        <item itemvalue="JUnit.CheckbookTest.getTransactionForPayee" />
-        <item itemvalue="JUnit.CheckbookTest.getTransactionsForDateTest" />
+        <item itemvalue="JUnit.CheckbookTest" />
         <item itemvalue="JUnit.CheckbookTest.checkbookValue" />
+        <item itemvalue="JUnit.CheckbookTest.getAllCreditTest" />
+        <item itemvalue="JUnit.CheckbookTest.constructorOneParam" />
         <item itemvalue="JUnit.CheckbookTest.toArrayparam2test" />
       </list>
     </recent_temporary>
@@ -407,49 +425,50 @@
       <option name="presentableId" value="Default" />
       <updated>1543958631974</updated>
       <workItem from="1543958633447" duration="3259000" />
-      <workItem from="1544205488920" duration="9178000" />
+      <workItem from="1544205488920" duration="14643000" />
     </task>
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="CheckbookTest_toArrayparam2test - 2018.12.07 at 16h 06m 47s.xml">
+    <history-entry file="CheckbookTest_toArrayparam2test - 2018.12.08 at 13h 33m 14s.xml">
       <configuration name="CheckbookTest.toArrayparam2test" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_checkbookValue - 2018.12.07 at 16h 16m 13s.xml">
-      <configuration name="CheckbookTest.checkbookValue" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_toArrayparam2test - 2018.12.08 at 13h 34m 50s.xml">
+      <configuration name="CheckbookTest.toArrayparam2test" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_checkbookValue - 2018.12.07 at 16h 17m 33s.xml">
-      <configuration name="CheckbookTest.checkbookValue" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_toArrayparam2test - 2018.12.08 at 13h 35m 11s.xml">
+      <configuration name="CheckbookTest.toArrayparam2test" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getTransactionsForDateTest - 2018.12.07 at 18h 17m 48s.xml">
-      <configuration name="CheckbookTest.getTransactionsForDateTest" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_constructorOneParam - 2018.12.08 at 14h 20m 37s.xml">
+      <configuration name="CheckbookTest.constructorOneParam" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getTransactionForPayee - 2018.12.07 at 18h 20m 02s.xml">
-      <configuration name="CheckbookTest.getTransactionForPayee" configurationId="JUnit" />
+    <history-entry file="CheckbookTest - 2018.12.08 at 14h 23m 30s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getTransactionForPayee - 2018.12.07 at 18h 20m 08s.xml">
-      <configuration name="CheckbookTest.getTransactionForPayee" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_getAllCreditTest - 2018.12.08 at 14h 24m 06s.xml">
+      <configuration name="CheckbookTest.getAllCreditTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getTransactionForPayee - 2018.12.07 at 18h 25m 55s.xml">
-      <configuration name="CheckbookTest.getTransactionForPayee" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_getAllCreditTest - 2018.12.08 at 14h 24m 48s.xml">
+      <configuration name="CheckbookTest.getAllCreditTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getTransactionForPayee - 2018.12.07 at 18h 27m 14s.xml">
-      <configuration name="CheckbookTest.getTransactionForPayee" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_checkbookValue - 2018.12.08 at 14h 24m 53s.xml">
+      <configuration name="CheckbookTest.checkbookValue" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getTransactionForPayee - 2018.12.07 at 18h 27m 48s.xml">
-      <configuration name="CheckbookTest.getTransactionForPayee" configurationId="JUnit" />
+    <history-entry file="CheckbookTest_checkbookValue - 2018.12.08 at 14h 25m 31s.xml">
+      <configuration name="CheckbookTest.checkbookValue" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="CheckbookTest_getAllDebitTest - 2018.12.07 at 18h 30m 33s.xml">
-      <configuration name="CheckbookTest.getAllDebitTest" configurationId="JUnit" />
+    <history-entry file="CheckbookTest - 2018.12.08 at 14h 25m 37s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="12437000" />
+    <option name="totallyTimeSpent" value="17902000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="23" width="1440" height="805" extended-state="0" />
+    <editor active="true" />
     <layout>
-      <window_info content_ui="combo" id="Project" order="0" weight="0.2532189" />
+      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.2532189" />
       <window_info id="Structure" order="1" weight="0.25" />
       <window_info id="Image Layers" order="2" />
       <window_info id="Designer" order="3" />
@@ -460,8 +479,8 @@
       <window_info anchor="bottom" id="Messages" weight="0.32959327" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
-      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.32959327" />
-      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
+      <window_info anchor="bottom" id="Run" order="2" visible="true" weight="0.32959327" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.3997195" />
       <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" />
@@ -529,13 +548,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="15">
-          <caret line="1" column="28" selection-start-line="1" selection-start-column="28" selection-end-line="1" selection-end-column="28" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/TransactionType.java">
       <provider selected="true" editor-type-id="text-editor">
         <state>
@@ -567,16 +579,9 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/AccountBook.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="30">
-          <caret line="2" column="17" selection-start-line="2" selection-start-column="17" selection-end-line="2" selection-end-column="17" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/Transaction.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="240">
+        <state relative-caret-position="-169">
           <caret line="16" column="5" lean-forward="true" selection-start-line="16" selection-start-column="5" selection-end-line="16" selection-end-column="5" />
           <folding>
             <element signature="imports" expanded="true" />
@@ -600,14 +605,41 @@
         </state>
       </provider>
     </entry>
+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.0/junit-4.0.jar!/org/junit/internal/runners/TestMethodRunner.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="134">
+          <caret line="94" selection-start-line="94" selection-end-line="94" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="326">
+          <caret line="162" column="5" lean-forward="true" selection-start-line="162" selection-start-column="5" selection-end-line="162" selection-end-column="5" />
+          <folding>
+            <element signature="imports" expanded="true" />
+            <element signature="e#1385#1386#0" expanded="true" />
+            <element signature="e#1406#1407#0" expanded="true" />
+            <element signature="e#2852#2853#0" expanded="true" />
+            <element signature="e#2932#2933#0" expanded="true" />
+            <element signature="e#4437#4438#0" expanded="true" />
+            <element signature="e#4458#4459#0" expanded="true" />
+            <element signature="e#4621#4622#0" expanded="true" />
+            <element signature="e#4685#4686#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/Checkbook.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="1215">
-          <caret line="81" column="4" selection-start-line="81" selection-start-column="4" selection-end-line="81" selection-end-column="4" />
+        <state relative-caret-position="266">
+          <caret line="93" column="50" selection-start-line="93" selection-start-column="50" selection-end-line="93" selection-end-column="50" />
           <folding>
             <element signature="imports" expanded="true" />
             <element signature="e#185#186#0" expanded="true" />
             <element signature="e#239#240#0" expanded="true" />
+            <element signature="e#391#392#0" expanded="true" />
+            <element signature="e#415#416#0" expanded="true" />
             <element signature="e#141#142#0" expanded="true" />
             <element signature="e#170#171#0" expanded="true" />
             <element signature="e#205#206#0" expanded="true" />
@@ -624,16 +656,19 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/Checkbook/src/test/java/CheckbookTest.java">
+    <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/AccountBook.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="165">
+          <caret line="11" column="1" lean-forward="true" selection-start-line="11" selection-start-column="1" selection-end-line="11" selection-end-column="1" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/Checkbook/src/main/java/GenericAccount.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="2235">
-          <caret line="149" column="49" lean-forward="true" selection-start-line="149" selection-start-column="49" selection-end-line="149" selection-end-column="49" />
+        <state relative-caret-position="75">
+          <caret line="5" column="52" selection-start-line="5" selection-start-column="52" selection-end-line="5" selection-end-column="52" />
           <folding>
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-            <element signature="e#2852#2853#0" expanded="true" />
-            <element signature="e#2932#2933#0" expanded="true" />
+            <element signature="e#182#183#0" expanded="true" />
           </folding>
         </state>
       </provider>

Checkbook/src/main/java/Checkbook.java

@@ -13,6 +13,14 @@ private ArrayList<Transaction> transactionList = new ArrayList<>();
         this.transactionList = transactionList;
     }
 
+    public Checkbook(double cashAmount){
+        this.add(new Transaction("",new Payee(),TransactionType.DEBIT, cashAmount));
+    }
+
+    public Checkbook(Payee owner, double cashAmount){
+        this.add(new Transaction("",owner,TransactionType.DEBIT, cashAmount));
+    }
+
     public int size(){
     return transactionList.size();
     }
@@ -43,8 +51,10 @@ private ArrayList<Transaction> transactionList = new ArrayList<>();
     }
 
     public Transaction[] toArray(Transaction[] input) {
-        Transaction[] arr = transactionList.toArray(input);
-        return arr;
+        for (Transaction t : input) {
+            transactionList.add(t);
+        }
+        return transactionList.toArray(new Transaction[transactionList.size()]);
     }
 
     public double checkbookValue() {
@@ -81,7 +91,7 @@ private ArrayList<Transaction> transactionList = new ArrayList<>();
     public Transaction[] getAllCredit() {
         ArrayList<Transaction> list = new ArrayList<>();
         for (Transaction t: transactionList) {
-            if(t.getType()==TransactionType.DEBIT) list.add(t);
+            if(t.getType()==TransactionType.CREDIT) list.add(t);
         }
         return list.toArray(new Transaction[0]);
     }

Checkbook/src/main/java/GenericAccount.java

@@ -1,3 +1,9 @@
 
-public class GenericAccount {
+public class GenericAccount <T extends AccountBook>{
+
+    AccountBook accountBook;
+
+    public GenericAccount(AccountBook accountBook) {
+        this.accountBook = accountBook;
+    }
 }

Checkbook/src/test/java/CheckbookTest.java

@@ -13,7 +13,8 @@ public class CheckbookTest {
     ArrayList<Transaction> list;
     Transaction transaction = new Transaction("",new Payee(), TransactionType.DEBIT,1.50);
     Transaction transaction2 =new Transaction("test", new Payee(), TransactionType.CREDIT, 50.50);
-    Checkbook checkbookOneParam,
+    Checkbook checkbookOneParam = new Checkbook(3.00);
+    Checkbook checkbookTwoParam = new Checkbook(new Payee(), 5.00);
 
     @org.junit.Before
     public void setUp() throws Exception {
@@ -117,15 +118,15 @@ public class CheckbookTest {
 
     @Test
     public void toArrayparam2test(){
-        Transaction[] arr = new Transaction[0];
-        Transaction[] actual = checkbook2.toArray(arr);
-        Assert.assertEquals(Transaction[].class, actual.getClass());
+        Transaction[] arr = new Transaction[]{new Transaction("", new Payee(),TransactionType.DEBIT,3.00)};
+        Transaction[] actual = checkbook.toArray(arr);
+        Assert.assertEquals(3, actual.length);
     }
 
     @Test
     public void checkbookValue(){
        double actual = checkbook.checkbookValue();
-    Assert.assertEquals(-52.0, actual);
+    Assert.assertEquals(-49.0, actual);
     }
 
     @Test
@@ -151,4 +152,13 @@ public class CheckbookTest {
         Assert.assertEquals(arr, checkbook.getAllCredit());
     }
 
+    @Test
+    public void constructorOneParam(){
+        Assert.assertEquals(1, checkbookOneParam.size());
+    }
+
+    @Test
+    public void constructorTwoParam(){
+        Assert.assertEquals(1, checkbookTwoParam.size());
+    }
 }