--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/ThreadLocal/ThreadId.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ *
+ *
+ * Example class from java.lang.ThreadLocal class doc. Used by
+ * TestThreadId.java
+ */
+
+// Josh Bloch suggested this latest version after many inputs from other
+// EG members and JUC list subscribers
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class ThreadId {
+    // Atomic integer containing the next thread ID to be assigned
+    private static final AtomicInteger nextId = new AtomicInteger(0);
+
+    // Thread local variable containing each thread's ID
+    private static final ThreadLocal<Integer> threadId =
+        new ThreadLocal<Integer>() {
+            @Override protected Integer initialValue() {
+                return nextId.getAndIncrement();
+        }
+    };
+
+    // Returns the current thread's unique ID, assigning it if necessary
+    public static int get() {
+        return threadId.get();
+    }
+}