First Commit

ArrayList to Check
Transaction Implements AccountBook
added Null to empty methods

Checkbook/src/main/java/Checkbook.java

@@ -1,10 +1,77 @@
+import java.time.LocalDate;
 import java.util.ArrayList;
+import java.util.Iterator;
 
 public class Checkbook {
     private ArrayList<Transaction> transactionList;
+    private double cashAmount;
+    private Payee owner;
 
-    Checkbook(ArrayList<Transaction> transactionList){
-        this.transactionList = transactionList;
+    Checkbook(double cashAmount){
+        this.cashAmount = cashAmount;
+        this.transactionList = new ArrayList<>();
     }
+    Checkbook(Payee owner, double cashAmount){
+        this.owner = owner;
+        this.cashAmount = cashAmount;
+        this.transactionList = new ArrayList<>();
+    }
+
+    public int size(){
+        return -1;
+    }
+
+    public boolean isEmpty(){
+        return false;
+    }
+
+    public boolean contains(Transaction element){
+        return false;
+    }
+
+    public boolean add(Transaction element){
+        return false;
+    }
+
+    public boolean remove(Transaction element){
+        return false;
+    }
+
+    public Iterator<Transaction> iterator(){
+        return null;
+    }
+
+    public Transaction[] toArray(){
+        return null;
+    }
+
+    public Transaction[] toArray(Transaction[] a){
+        return null;
+    }
+
+    public double checkbookValue(){
+        return -1;
+
+    } // sum of all Transactions (both Debits and Credits)
+
+
+    public Transaction getTransactionsForDate(LocalDate aDate){
+        return null;
+    }
+
+    public Transaction[] getAllTransactionsForPayee(Payee payee){
+        return null;
+    }
+
+    public Transaction[] getAllDebitTransactions(){
+        return null;
+    }
+
+    public Transaction[] getAllCreditTransactions(){
+        return null;
+    }
+
+
+
 
 }