Bael 389 - Making Gson field in both classes static (#1366)

* Project for " A Guide to the Java API for WebSocket" article

* Setting dependencies correctly

* Formatting adjustments

* Removing tomcat7 maven plugin

* Applying formatt - No spaces

* BAEL-389 - Building URL dynamically between host and pathname

* Setting javax websocket api scope to provided

* Make Gson static field

java-websocket/src/main/java/com/baeldung/websocket/MessageDecoder.java

@@ -8,9 +8,11 @@ import com.baeldung.model.Message;
 import com.google.gson.Gson;
 
 public class MessageDecoder implements Decoder.Text<Message> {
+
+    private static Gson gson = new Gson();
+
     @Override
     public Message decode(String s) throws DecodeException {
-        Gson gson = new Gson();
         Message message = gson.fromJson(s, Message.class);
         return message;
     }

java-websocket/src/main/java/com/baeldung/websocket/MessageEncoder.java

@@ -8,9 +8,11 @@ import com.baeldung.model.Message;
 import com.google.gson.Gson;
 
 public class MessageEncoder implements Encoder.Text<Message> {
+
+    private static Gson gson = new Gson();
+
     @Override
     public String encode(Message message) throws EncodeException {
-        Gson gson = new Gson();
         String json = gson.toJson(message);
         return json;
     }