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diff --git a/docs/modules/ROOT/examples/introduction/ComparablePoint.java b/docs/modules/ROOT/examples/introduction/ComparablePoint.java
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+++ b/docs/modules/ROOT/examples/introduction/ComparablePoint.java
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+/*
+Copyright (c) Xerox Corporation 1998-2002.  All rights reserved.
+
+Use and copying of this software and preparation of derivative works based
+upon this software are permitted.  Any distribution of this software or
+derivative works must comply with all applicable United States export control
+laws.
+
+This software is made available AS IS, and Xerox Corporation makes no warranty
+about the software, its performance or its conformity to any specification.
+*/
+
+package introduction;
+
+public aspect ComparablePoint {
+
+   declare parents: Point implements Comparable;
+
+   public int Point.compareTo(Object o) {
+      return (int) (this.getRho() - ((Point)o).getRho());
+   }
+
+   public static void main(String[] args){
+      Point p1 = new Point();
+      Point p2 = new Point();
+
+      System.out.println("p1 =?= p2 :" + p1.compareTo(p2));
+
+      p1.setRectangular(2,5);
+      p2.setRectangular(2,5);
+      System.out.println("p1 =?= p2 :" + p1.compareTo(p2));
+
+      p2.setRectangular(3,6);
+      System.out.println("p1 =?= p2 :" + p1.compareTo(p2));
+
+      p1.setPolar(Math.PI, 4);
+      p2.setPolar(Math.PI, 4);
+      System.out.println("p1 =?= p2 :" + p1.compareTo(p2));
+
+      p1.rotate(Math.PI / 4.0);
+      System.out.println("p1 =?= p2 :" + p1.compareTo(p2));
+
+      p1.offset(1,1);
+      System.out.println("p1 =?= p2 :" + p1.compareTo(p2));
+   }
+}