Changed package naming across all examples.

private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java

@@ -0,0 +1,34 @@
+package com.iluwatar.privateclassdata;
+
+/**
+ * 
+ * The Private Class Data design pattern seeks to reduce exposure of attributes 
+ * by limiting their visibility. It reduces the number of class attributes by 
+ * encapsulating them in single data object. It allows the class designer to 
+ * remove write privilege of attributes that are intended to be set only during 
+ * construction, even from methods of the target class.
+ * 
+ * In the example we have normal Stew class with some ingredients given in
+ * constructor. Then we have methods to enumerate the ingredients and to taste
+ * the stew. The method for tasting the stew alters the private members of the
+ * stew class.
+ * 
+ * The problem is solved with the Private Class Data pattern. We introduce
+ * ImmutableStew class that contains StewData. The private data members of
+ * Stew are now in StewData and cannot be altered by ImmutableStew methods.
+ *
+ */
+public class App {
+	
+    public static void main( String[] args ) {
+    	// stew is mutable
+    	Stew stew = new Stew(1, 2, 3, 4);
+    	stew.mix();
+    	stew.taste();
+    	stew.mix();
+    	
+    	// immutable stew protected with Private Class Data pattern
+    	ImmutableStew immutableStew = new ImmutableStew(2, 4, 3, 6);
+    	immutableStew.mix();
+    }
+}