doing work

src/main/java/io/zipcoder/SafeCopier.java

  * Make this extend the Copier like `UnsafeCopier`, except use locks to make sure that the actual intro gets printed
  * correctly every time.  Make the run method thread safe.
  */
-public class SafeCopier {
+public class SafeCopier extends Copier{
+
+    // constructor
+    public SafeCopier(String toCopy) {
+        super(toCopy);
+    }
+
+    public synchronized void run() {
+        while ( stringIterator.hasNext()) {
+            copied += stringIterator.next() + " ";
+        }
+    }
 }

src/main/java/io/zipcoder/UnsafeCopier.java

     }
 
     public void run() {
+        while ( stringIterator.hasNext()) {         // stringIterator comes from Copier
+            copied += stringIterator.next() + " ";
+        }
     }
 }
+
+
+/*
+Part 1
+
+Made for you is an abstract base class of Copier which has a constructor that takes a String and turns that into an iterator.
+This will allow us to traverse the text to be copied and pass it along to each monkey (thread).
+
+Extend Copier in UnsafeCopier.
+Then, write a run method that will have the monkey grab the next word and append it to the copy.
+
+Modify MonkeyTypewriter to create 5 monkeys (threads) using the UnsafeCopier and start them.
+
+After the sleep, print out the results of the unsafely copied passage.
+
+Part 2
+
+Finish the SafeCopier and then call that from the main method, in addition to the unsafe version.
+ */