--- jsr166/src/jsr166y/RecursiveTask.java	2009/07/20 22:26:04	1.3
+++ jsr166/src/jsr166y/RecursiveTask.java	2013/07/26 16:36:21	1.13
@@ -1,29 +1,29 @@
 /*
  * Written by Doug Lea with assistance from members of JCP JSR-166
  * Expert Group and released to the public domain, as explained at
- * http://creativecommons.org/licenses/publicdomain
+ * http://creativecommons.org/publicdomain/zero/1.0/
  */
 
 package jsr166y;
 
 /**
- * Recursive result-bearing ForkJoinTasks.
- * <p> For a classic example, here is a task computing Fibonacci numbers:
+ * A recursive result-bearing {@link ForkJoinTask}.
  *
- * <pre>
- * class Fibonacci extends RecursiveTask&lt;Integer&gt; {
+ * <p>For a classic example, here is a task computing Fibonacci numbers:
+ *
+ *  <pre> {@code
+ * class Fibonacci extends RecursiveTask<Integer> {
  *   final int n;
  *   Fibonacci(int n) { this.n = n; }
- *   Integer compute() {
- *     if (n &lt;= 1)
- *        return n;
+ *   protected Integer compute() {
+ *     if (n <= 1)
+ *       return n;
  *     Fibonacci f1 = new Fibonacci(n - 1);
  *     f1.fork();
  *     Fibonacci f2 = new Fibonacci(n - 2);
  *     return f2.compute() + f1.join();
  *   }
- * }
- * </pre>
+ * }}</pre>
  *
  * However, besides being a dumb way to compute Fibonacci functions
  * (there is a simple fast linear algorithm that you'd use in
@@ -33,17 +33,14 @@ package jsr166y;
  * minimum granularity size (for example 10 here) for which you always
  * sequentially solve rather than subdividing.
  *
+ * @since 1.7
+ * @author Doug Lea
  */
 public abstract class RecursiveTask<V> extends ForkJoinTask<V> {
+    private static final long serialVersionUID = 5232453952276485270L;
 
     /**
-     * Empty constructor for use by subclasses.
-     */
-    protected RecursiveTask() {
-    }
-
-    /**
-     * The result returned by compute method.
+     * The result of the computation.
      */
     V result;
 
@@ -61,7 +58,7 @@ public abstract class RecursiveTask<V> e
     }
 
     /**
-     * Implements execution conventions for RecursiveTask
+     * Implements execution conventions for RecursiveTask.
      */
     protected final boolean exec() {
         result = compute();