Java Telegram bot: get chat_id

In Java Telegram bots, you get chat_id and user_id from the update. Here are examples.

Using telegram-bot-api (Java)

@Override
public void onUpdateReceived(Update update) {
    if (update.hasMessage()) {
        Message message = update.getMessage();
        Long chatId = message.getChatId();
        Long userId = message.getFrom().getId();
        sendMessage(chatId, "Chat ID: " + chatId + ", User ID: " + userId);
    }
}

message.getChatId() — chat_id
message.getFrom().getId() — sender’s Telegram user ID

From callback query

if (update.hasCallbackQuery()) {
    CallbackQuery callback = update.getCallbackQuery();
    Long chatId = callback.getMessage().getChatId();
    Long userId = callback.getFrom().getId();
    // ...
}

From channel post

if (update.hasChannelPost()) {
    Message post = update.getChannelPost();
    Long chatId = post.getChatId();  // channel ID
    // ...
}

Debugging with @print_id_bot

Use @print_id_bot to inspect the raw update:

/json — Message as JSON. Compare with your Update object.
/dump — Full update and raw JSON (private chat only). Use to verify structure.

Forward a message to the bot and send /dump to see the exact format.

FAQ

How do I get chat_id when the bot is added to a group?

When a user sends a message, your handler receives it with getMessage().getChatId(). Or add @print_id_bot and send /id to get it manually.

Should I use Long or long for chat_id?

Use Long to handle null. For message updates, getChatId() returns a non-null Long.

Where is the update structure?

The Telegram Bot API documents it. Use /dump in @print_id_bot for real examples.

What if getFrom() is null?

For channel_post, there is no from. Check for null before calling getId().

Can I log the raw update?

Yes. Log update or serialize it to JSON. Compare with /dump output from @print_id_bot.

Use @print_id_bot /dump to inspect update structure for Java bots.

Open @print_id_bot