Gson for Java example code added

Author: mukeshydv

index.html

@@ -120,12 +120,12 @@
 				</div>
 			</div>
 			<div class="col-sm-5">
+				<div class="alert alert-danger" role="alert" id="errorAlert">
+				</div>
 				<div class="form-group bg-secondary text-light border border-secondary rounded p-2">
 					<label for="input">Input JSON:</label>
 					<textarea class="form-control form-font" rows="25" id="input"></textarea>
 				</div> 
-				<div class="alert alert-danger" role="alert" id="errorAlert">
-				</div>
 				<div class="alert alert-secondary" role="alert" id="exampleCode">
 				</div>
 			</div>

languages/JavaGson.json

@@ -131,5 +131,6 @@
                 "checked": ""
             }
         }
-    }
+    },
+    "exampleCode": "## Example\n\n\n#### Decoding:\nThe example below shows how to decode an instance of `<!RootClassName>` type from JSON object.\n\n```java\nString json = \"...\"; // Your JSON String.\n\nGsonBuilder builder = new GsonBuilder();\nGson gson = builder.create();\n<!RootClassName> model = gson.fromJson(json, <!RootClassName>.class);\n```\n\n\n#### Encoding: \nThe example below shows how to encode an instance of a simple `<!RootClassName>` type into a JSON object.\n\n```java\n<!RootClassName> model = new <!RootClassName>();\n// Assign value to variables.\n\nGsonBuilder builder = new GsonBuilder();\nGson gson = builder.create();\nSystem.out.println(gson.toJson(model));\n```"
 }