diff --git a/gson/src/main/java/com/google/gson/JsonDeserializer.java b/gson/src/main/java/com/google/gson/JsonDeserializer.java
index 46550edf..6462d45c 100644
--- a/gson/src/main/java/com/google/gson/JsonDeserializer.java
+++ b/gson/src/main/java/com/google/gson/JsonDeserializer.java
@@ -48,11 +48,13 @@ import java.lang.reflect.Type;
  * deserializer:</p>
  *
  * <pre>
- * class IdDeserializer implements JsonDeserializer&lt;Id&gt;() {
+ * class IdDeserializer implements JsonDeserializer&lt;Id&gt; {
  *   public Id deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
  *       throws JsonParseException {
- *     return new Id((Class)typeOfT, id.getValue());
+ *     long idValue = json.getAsJsonPrimitive().getAsLong();
+ *     return new Id((Class) typeOfT, idValue);
  *   }
+ * }
  * </pre>
  *
  * <p>You will also need to register {@code IdDeserializer} with Gson as follows:</p>
diff --git a/gson/src/main/java/com/google/gson/JsonSerializer.java b/gson/src/main/java/com/google/gson/JsonSerializer.java
index 9b3e1ed5..2bdb8fb2 100644
--- a/gson/src/main/java/com/google/gson/JsonSerializer.java
+++ b/gson/src/main/java/com/google/gson/JsonSerializer.java
@@ -48,7 +48,7 @@ import java.lang.reflect.Type;
  * serializer:</p>
  *
  * <pre>
- * class IdSerializer implements JsonSerializer&lt;Id&gt;() {
+ * class IdSerializer implements JsonSerializer&lt;Id&gt; {
  *   public JsonElement serialize(Id id, Type typeOfId, JsonSerializationContext context) {
  *     return new JsonPrimitive(id.getValue());
  *   }