added "Package Access vs. Public Constructors" section

hiding/CreatePackageAccessObject.java

@@ -0,0 +1,12 @@
+// hiding/CreatePackageAccessObject.java
+// (c)2017 MindView LLC: see Copyright.txt
+// We make no guarantees that this code is fit for any purpose.
+// Visit http://OnJava8.com for more book information.
+// {WillNotCompile}
+import hiding.packageaccess.*;
+
+public class CreatePackageAccessObject {
+  public static void main(String[] args) {
+    new PublicConstructor();
+  }
+}

hiding/packageaccess/PublicConstructor.java

@@ -0,0 +1,9 @@
+// hiding/packageaccess/PublicConstructor.java
+// (c)2017 MindView LLC: see Copyright.txt
+// We make no guarantees that this code is fit for any purpose.
+// Visit http://OnJava8.com for more book information.
+package hiding.packageaccess;
+
+class PublicConstructor {
+  public PublicConstructor() {}
+}