Для работы нужно создать Standalone-приложение и при первом запуске подтвердить запрос приложения и скопировать access_token из адресной строки.
При желании можно добавить свои методы, которые описаны в документации.
Пример:
VkApi vkApi = VkApi.with(APP_ID, ACCESS_TOKEN);
System.out.println(vkApi.getAlbums("140381946");
Формат полученных данных - JSON. Распарсить можно библиотекой org.json

                        
public class VkApi {

 

    private static final String AUTH_URL = "https://oauth.vk.com/authorize?client_id={APP_ID}&scope={PERMISSIONS}&redirect_uri={REDIRECT_URI}&display={DISPLAY}&v={API_VERSION}&response_type=token";

 

    private static final String API_REQUEST = "https://api.vk.com/method/{METHOD}?{PARAMS}&access_token={TOKEN}&v=5.21";

 

    public static VkApi with(String appId, String accessToken) throws IOException {

        return new VkApi(appId, accessToken);

    }

 

    private final String accessToken;

 

    private VkApi(String appId, String accessToken) throws IOException {

        this.accessToken = accessToken;

        if (accessToken == null || accessToken.isEmpty()) {

            auth(appId);

            throw new Error("Need access token");

        }

    }

 

    private void auth(String appId) throws IOException {

        String reqUrl = AUTH_URL

            .replace("{APP_ID}", appId)

            .replace("{PERMISSIONS}", "photos,messages")

            .replace("{REDIRECT_URI}", "https://oauth.vk.com/blank.html")

            .replace("{DISPLAY}", "page")

            .replace("{API_VERSION}", "5.21");

        try {

            Desktop.getDesktop().browse(new URL(reqUrl).toURI());

        } catch (URISyntaxException ex) {

            throw new IOException(ex);

        }

    }

 

    public String getDialogs() throws IOException {

        return invokeApi("messages.getDialogs", null);

    }

 

    public String getHistory(String userId, int offset, int count, boolean rev) throws IOException {

        return invokeApi("messages.getHistory", Params.create()

            .add("user_id", userId)

            .add("offset", String.valueOf(offset))

            .add("count", String.valueOf(count))

            .add("rev", rev ? "1" : "0"));

    }

 

    public String getAlbums(String userId) throws IOException {

        return invokeApi("photos.getAlbums", Params.create()

            .add("owner_id", userId)

            .add("photo_sizes", "1")

            .add("thumb_src", "1"));

    }

 

    private String invokeApi(String method, Params params) throws IOException {

        final String parameters = (params == null) ? "" : params.build();

        String reqUrl = API_REQUEST

            .replace("{METHOD}", method)

            .replace("{TOKEN}", accessToken)

            .replace("{PARAMS}&", parameters);

        final StringBuilder result = new StringBuilder();

        final URL url = new URL(reqUrl);

        try (InputStream is = url.openStream()) {

            BufferedReader reader = new BufferedReader(new InputStreamReader(is));

            reader.lines().forEach(result::append);

        }

        return result.toString();

    }

 

    private static class Params {

 

        public static Params create() {

            return new Params();

        }

 

        private final HashMap<String, String> params;

 

        private Params() {

            params = new HashMap<>();

        }

 

        public Params add(String key, String value) {

            params.put(key, value);

            return this;

        }

 

        public String build() {

            if (params.isEmpty()) return "";

            final StringBuilder out = new StringBuilder();

            params.keySet().stream().forEach(key -> {

                out.append(key).append('=').append(params.get(key)).append('&');

            });

            return out.toString();

        }

    }

}