Next, create handler methods for each structure in your JSON text. You'll + * need a method for each object type and for each array type. + *
When a nested object or array is encountered, delegate to the + * corresponding handler method. + * + *
When an unknown name is encountered, strict parsers should fail with an + * exception. Lenient parsers should call {@link #skipValue()} to recursively + * skip the value's nested tokens, which may otherwise conflict. + * + *
If a value may be null, you should first check using {@link #peek()}. + * Null literals can be consumed using either {@link #nextNull()} or {@link + * #skipValue()}. + * + *
{@code
+ * [
+ * {
+ * "id": 912345678901,
+ * "text": "How do I read a JSON stream in Java?",
+ * "geo": null,
+ * "user": {
+ * "name": "json_newb",
+ * "followers_count": 41
+ * }
+ * },
+ * {
+ * "id": 912345678902,
+ * "text": "@json_newb just use JsonReader!",
+ * "geo": [50.454722, -104.606667],
+ * "user": {
+ * "name": "jesse",
+ * "followers_count": 2
+ * }
+ * }
+ * ]}
+ * This code implements the parser for the above structure: {@code
+ *
+ * public List readJsonStream(InputStream in) throws IOException {
+ * JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
+ * try {
+ * return readMessagesArray(reader);
+ * } finally {
+ * reader.close();
+ * }
+ * }
+ *
+ * public List readMessagesArray(JsonReader reader) throws IOException {
+ * List messages = new ArrayList();
+ *
+ * reader.beginArray();
+ * while (reader.hasNext()) {
+ * messages.add(readMessage(reader));
+ * }
+ * reader.endArray();
+ * return messages;
+ * }
+ *
+ * public Message readMessage(JsonReader reader) throws IOException {
+ * long id = -1;
+ * String text = null;
+ * User user = null;
+ * List geo = null;
+ *
+ * reader.beginObject();
+ * while (reader.hasNext()) {
+ * String name = reader.nextName();
+ * if (name.equals("id")) {
+ * id = reader.nextLong();
+ * } else if (name.equals("text")) {
+ * text = reader.nextString();
+ * } else if (name.equals("geo") && reader.peek() != JsonToken.NULL) {
+ * geo = readDoublesArray(reader);
+ * } else if (name.equals("user")) {
+ * user = readUser(reader);
+ * } else {
+ * reader.skipValue();
+ * }
+ * }
+ * reader.endObject();
+ * return new Message(id, text, user, geo);
+ * }
+ *
+ * public List readDoublesArray(JsonReader reader) throws IOException {
+ * List doubles = new ArrayList();
+ *
+ * reader.beginArray();
+ * while (reader.hasNext()) {
+ * doubles.add(reader.nextDouble());
+ * }
+ * reader.endArray();
+ * return doubles;
+ * }
+ *
+ * public User readUser(JsonReader reader) throws IOException {
+ * String username = null;
+ * int followersCount = -1;
+ *
+ * reader.beginObject();
+ * while (reader.hasNext()) {
+ * String name = reader.nextName();
+ * if (name.equals("name")) {
+ * username = reader.nextString();
+ * } else if (name.equals("followers_count")) {
+ * followersCount = reader.nextInt();
+ * } else {
+ * reader.skipValue();
+ * }
+ * }
+ * reader.endObject();
+ * return new User(username, followersCount);
+ * }}
+ *
+ *