--- /dev/null	2014-01-14 17:58:07.923182598 +0400
+++ new/src/share/demo/default-methods/DiamondInheritance.java	2014-01-15 17:13:32.595905360 +0400
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * The code sample diamond inheritance with <b>default methods</b>. If there's
+ * not already a unique method implementation to inherit, you must provide
+ * it. The inheritance diagram is similar to the following:
+ * <pre>
+ *                   Animal
+ *                    /   \
+ *                 Horse   Bird
+ *                    \   /
+ *                   Pegasus
+ * </pre>
+ *
+ * Both {@link Horse} and {@link Bird} interfaces implements the <code>go</code>
+ * method. The {@link Pegasus} class have to overrides the 
+ * <code>go</code> method.
+ *
+ * The new syntax of super-call is used here:
+ * <pre>
+ *     &lt;interface_name&gt;.super.&lt;method&gt;(...);
+ *     For example:  Horse.super.go();
+ * </pre> So, Pegasus moves like a horse.
+ *
+ * @author Taras Ledkov
+ */
+public class DiamondInheritance {
+
+    /**
+     * Base interface to illustrate the diamond inheritance.
+     *
+     * @see DiamondInheritance
+     */
+    public interface Animal {
+
+        /**
+         * Return string representation of the "go" action for concrete animal
+         *
+         * @return string representation of the "go" action for concrete animal
+         */
+        String go();
+    }
+
+    /**
+     * Interface to illustrate the diamond inheritance.
+     *
+     * @see DiamondInheritance
+     */
+    public interface Horse extends Animal {
+
+        /**
+         * Return string representation of the "go" action for horse
+         *
+         * @return string representation of the "go" action for horse
+         */
+        @Override
+        default String go() {
+            return this.getClass().getSimpleName() + " walks on four legs";
+        }
+    }
+
+    /**
+     * Interface to illustrate the diamond inheritance.
+     *
+     * @see DiamondInheritance
+     */
+    public interface Bird extends Animal {
+
+        /**
+         * Return string representation of the "go" action for bird
+         *
+         * @return string representation of the "go" action for bird
+         */
+        @Override
+        default String go() {
+            return this.getClass().getSimpleName() + " walks on two legs";
+        }
+
+        /**
+         * Return string representation of the "fly" action for bird
+         *
+         * @return string representation of the "fly" action for bird
+         */
+        default String fly() {
+            return "I can fly";
+        }
+    }
+
+    /**
+     * Class to illustrate the diamond inheritance. Pegasus must mix horse and
+     * bird behavior.
+     *
+     * @see DiamondInheritance
+     */
+    public static class Pegasus implements Horse, Bird {
+
+        /**
+         * Return string representation of the "go" action for the fictitious
+         * creature Pegasus
+         *
+         * @return string representation of the "go" action for the fictitious
+         * creature Pegasus
+         */
+        @Override
+        public String go() {
+            return Horse.super.go();
+        }
+    }
+
+    /**
+     * Illustrate the behavior of the {@link Pegasus} class
+     *
+     * @param args command line arguments
+     */
+    public static void main(final String[] args) {
+        System.out.println(new Pegasus().go());
+    }
+}