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Channel

Уютное сообщество джавистов

@javaarchivebooks

On this record: Growth · Engagement · Reactions · Posts · Citations · Handles named that no longer answer · Cite this entry

1,878subscribers

-8 since we began measuring on 7 August 2026

Risers and fallers across the register · movement among entries of 1,000–3,162.

Register entry

Telegram ID-1001721782278
TypeChannel
Username@javaarchivebooks
CreatedBetween 1 December 2021 and 30 April 2023 — estimated from Telegram’s id allocation, not measured. How this range is calculated.
First recorded7 August 2026
Last confirmed live3 September 2026
Measurements held8
Confirmed unchanged1 time, most recently 3 September 2026
On Telegramt.me/javaarchivebooks

Growth

1,8781,8871,882.57 August 2026 — 1,886 subscribers7 August 2026 — 1,886 subscribers14 August 2026 — 1,887 subscribers17 August 2026 — 1,885 subscribers20 August 2026 — 1,881 subscribers24 August 2026 — 1,880 subscribers31 August 2026 — 1,879 subscribers3 September 2026 — 1,878 subscribers7 August 20263 September 2026
8 measurements spanning 27 days, net -8. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 1,877–1,888 and does not start at zero.
Measurement log — every subscribers count we have recorded
Measured (UTC)SubscribersChange
3 Sept 2026, 12:221,878-1
31 Aug 2026, 00:141,879-1
24 Aug 2026, 15:441,880-1
20 Aug 2026, 21:361,881-4
17 Aug 2026, 19:341,885-2
14 Aug 2026, 16:441,887+1
7 Aug 2026, 06:311,886no change
7 Aug 2026, 06:261,886first reading

Engagement

20 posts held, back to 16 December 2024the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 2 pages of Telegram’s post history, 20 posts per page.

Nothing published in the last 30 days. ERR and ER are rolling 30-day measures, so there is nothing to compute — we hold 20 posts for this entry, the most recent from 26 February 2026. An engagement rate over an empty window would be a number about nothing.

Reaction mix

31 reactions across 15 posts, in 5 distinct kinds. The most used accounts for 51.6% of them.

Every reaction kind recorded on the sample, most used first
ReactionCountShareShare, drawn
👍1651.6%
722.6%
👏39.68%
🥰39.68%
😁26.45%

No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.

Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.

Coverage. Reactions were read on 15 of the 20 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 31 reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.

Measured over the 20 most recent posts we hold, published 16 December 2024 to 26 February 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.

Recent posts

26 Feb 2026, 05:50 UTC627 views1 reactionsread 7 August 2026
Photo

Java: быстрый старт Автор: Джейми Чан Год издания: 2021 #java #ru Скачать книгу

👏1

19 Feb 2026, 14:41 UTC748 views1 reactionsread 7 August 2026
Photo

Java. Состояние языка и его перспективы Автор: Федор Урванов Год издания: 2023 #java #ru Скачать книгу

👍1

16 Sept 2025, 16:21 UTC≈1,280 views2 reactionsread 7 August 2026
Photo

Java: устранение проблем Автор: Лауренциу Спилкэ Год издания: 2023 #java #ru Скачать книгу

2

30 Aug 2025, 07:59 UTC≈1,290 views1 reactionsread 7 August 2026
Photo

Mastering Secure Java Applications Авторы: Debopam Poddar, Joyanta Banerjee, Tarun Kumar Chawdhury Год издания: 2024 #java #en Скачать книгу

👍1

15 Jul 2025, 14:14 UTC≈1,360 viewsread 7 August 2026
Photo

Java. Библиотека профессионала Автор: Кей С. Хорстманн Год издания: 2020 #java #ru Скачать книгу

19 Jun 2025, 13:12 UTC≈1,330 views4 reactionsread 7 August 2026

Что такое Optional? Опциональное значение Optional — это контейнер для объекта, который может содержать или не содержать значение null. Такая обёртка является удобным средством предотвращения NullPointerException, т.к. имеет некоторые функции высшего порядка, избавляющие от добавления повторяющихся if null/notNull проверок: Optional<String> optional = Optional.of("hello"); optional.isPresent(); // true optional.if

👍4

4 Mar 2025, 11:18 UTC≈1,600 views1 reactionsread 7 August 2026
Photo

Java. Оптимизация программ Автор: Эванс Бенджамин, Джеймс Гоф, Ньюланд Крис Год издания: 2021 #java #ru Скачать книгу

1

3 Mar 2025, 11:18 UTC≈1,340 viewsread 7 August 2026
Photo

Гид Java-разработчика. Проектно-ориентированный подход Автор: Рауль-Габриэль Урма Год издания: 2022 #java #ru Скачать книгу

30 Jan 2025, 13:09 UTC≈1,480 views4 reactionsread 7 August 2026
Photo

Java: устранение проблем Автор: Лауренциу Спилкэ Год издания: 2023 #java #ru Скачать книгу

👍4

28 Jan 2025, 13:07 UTC≈1,200 views2 reactionsread 7 August 2026
Photo

Java: руководство для начинающих. 9 изд Автор: Герберт Шилдт Год издания: 2023 #java #ru Скачать книгу

😁2

23 Jan 2025, 18:13 UTC≈1,150 views1 reactionsread 7 August 2026
Photo

От Java к Kotlin Авторы: Дункан Макгрегор, Нэт Прай Год издания: 2023 #java #kotlin #ru Скачать книгу

👍1

21 Jan 2025, 18:12 UTC≈1,040 views3 reactionsread 7 August 2026
Photo

Designing Hexagonal Architecture with Java Автор: Davi Vieira Год издания: 2023 #java #en Скачать книгу

👍3

Showing the 12 most recent of 20 posts we hold for @javaarchivebooks. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Mentions

Names

Channels on the register whose handles appear in this channel's posts.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 3 September 2026 — this entry's latest reading, not the date you are reading this.

“Уютное сообщество джавистов” (@javaarchivebooks), 1,878 subscribers as measured 3 September 2026. Telegram Register, tgregister.com/channel/javaarchivebooks.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.