TelegramBot

public static void sendMessage(String msg) throws Exception {

    String botToken = "###############";

    TelegramBot bot = new TelegramBot(botToken);

    String telegramNo = "###############";


     SendMessage request = new SendMessage(telegramNo, textMessage)
          .parseMode(ParseMode.HTML) .disableWebPagePreview(true).disableNotification(false);

      SendResponse sendResponse = bot.execute(request);

      boolean ok = sendResponse.isOk();

      com.pengrad.telegrambot.model.Message message = sendResponse.message();

      if(ok){

        System.out.println("메세지 보내기 성공");   

      }else{

        System.out.println("메세지 보내기 실패");

      }

}

Pom.xml

 <dependency>
   <groupId>com.github.pengrad</groupId>
   <artifactId>java-telegram-bot-api</artifactId>
   <version>4.6.0</version>
</dependency>