Telegram Bot Utilities – examples: Receive updates

Receive bot’s Updates

The “getUpdates” method accepts three parameters:

• The first parameter is the starting id (i.e. the minimum id of the first update being returned)
• The second one is called limit: the number of updates being read in the current call (if it is set to less than 1 it will return all the avaiable updates)
• The last parameter is the timeout for the request (if set to less than 1 it will not set a timeout)

Here you can see a small piece of code that shows how to receive incoming updates:

public static void main(String[] args) throws GettingUpdatesException, IOException {
    String yourToken = "YOUR TOKEN";
    // Instantiates bot
    TelegramBot b = new TelegramBot(yourToken);
    // Instantiates updates array
    Update[] updates;
    try {
        // Try to receive incoming updates from the bot
        updates = b.getUpdates(-1, -1, -1);
    } catch (EmptyUpdatesException e) {
        e.printStackTrace();
    }
    // Iterate over the updates
    for (int i = 0; i < updates.length; i++) {
        //An update could have no message (e.g. it is an inline query, or other)
        if(updates[i].getMessage() != null) {
            // If there is a Message into the current update, then print it
            System.out.println(updates[i].getMessage().getText());
        }
    }
}

Here you can see how you can use that method in order to create an echo bot: