Added a test/example of running a client and a server in the

same JVM.  a) this makes a good example of self-hosted style
LAN multiplayer games, and b) it causes the serialization bug
to show up so I can fix it.  (Already fixed it and that commit
will be next... it's almost like TDD.)

jme3-examples/src/main/java/jme3test/network/TestChatClientAndServer.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2015 jMonkeyEngine
+ * 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 'jMonkeyEngine' 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.
+ */
+package jme3test.network;
+
+
+/**
+ *  Combines the server instance and a client instance into the
+ *  same JVM to show an example of, and to test, a pattern like
+ *  self-hosted multiplayer games.
+ *
+ *  @author    Paul Speed
+ */
+public class TestChatClientAndServer {
+    
+    public static void main( String... args ) throws Exception {
+
+        System.out.println("Starting chat server...");    
+        TestChatServer chatServer = new TestChatServer();
+        chatServer.start();
+ 
+        System.out.println("Waiting for connections on port:" + TestChatServer.PORT);
+ 
+        // Now launch a client
+
+        TestChatClient test = new TestChatClient("localhost");
+        test.setVisible(true);
+        
+        // Register a shutdown hook to get a message on the console when the
+        // app actually finishes
+        Runtime.getRuntime().addShutdownHook(new Thread() {
+                @Override
+                public void run() {
+                    System.out.println("Client and server test is terminating.");
+                }
+            });
+                
+        // Keep running basically forever or until the server
+        // shuts down
+        while( chatServer.isRunning() ) {
+            synchronized (chatServer) {
+                chatServer.wait();
+            }
+        }    
+    }
+}