How Spring is different from core java

 Mostly Spring differs from Core java has it reduces dependency of one element on other. In spring the code is made loosely coupled and hence dependency on one element on other is completely eliminated.

With the help of dependency injection (dependency is injected through annotations or xml). Code is made loosely coupled. For good programming practice, the code should be loosely coupled. Which in core java, we cannot do. It can be done in spring.

For Example

Class Employee{

private String empID=null;

private Address add=null;

public String getEmpId(){

return empID;}

public void setEmpId(String empID){

this.empID=empID;}

public Address getAddress(){

return add;}

public void setAddress(Address add){

this.add=add;}

}

Class Address{

}

In the above example Class Employee depends on Class Address in Core Java. The example is said to be tightly coupled code. In spring Injection of Class Address is either done by .xml file or annotation. Hence the dependency is reduced, and code is made loosely coupled. 

Brain neuron's siphon at zero cost

 Brain which is considered to be one of the most important parts in human body, is contemplated to be the powerhouse of human advancements. Either excelling at business or education or any activity, brain power is must. Measure of intelligence is directly correlated to, how striking is electric neurons activity. Advancement in science, medicine or in any field majorly revolves around the brain. From early man to the human being now, brain played major role in human advancements. In this article, I like to reveal some secrets that can increase our brain activity with zero cost involved.

With my experiments from past 12 years, I got to know, how to make brain electric.

                                                          Chess

Thing, I like the best with chess is, that it makes people think, which will definitely lubricate the brain. I recommend solving chess puzzles are best to increase your brain power. The title of this article is with no cost involved; I will improve your brain activity. With my experience with chess, it will be more rewarding if you only solve chess puzzles. I like to reveal some free chess puzzles sites and applications which are free.

                

   

www.lichess.org (There chess puzzles are free, I find those puzzles having depth and will increase your creativity and imagination) 

   

TACTICS FRENZY

This App, which belongs to world number 1(according to FIDE Rating) Magnus Carlsen's a chess app.Chess  puzzles are free of cost and very deep. I will guarantee you for a complete neuronlitement(joke).

You can get this app in play store.

Note:Even for people with chess background also can daily, solve 10 puzzles will improve their brain activity.

                                                        SUDOKU

With my experience, I find solving sudoku's are good for brain. I like to give free sudoku site, that you can find on the internet.

  Daily Puzzles - Sudoku Of The Day        

You will get mind bending sudoku's here.The swordfish sudoku's and X-Wings puzzles are the best here.From beginner to advance geeks, everybody can find the recipe over here.

                                           MATH AND RESONING

MATH and RESONING provides much needed inputs to brain. I like to list some really good YouTube channels, that can make you excited.

           

                       (1476) LOGICALLY YOURS - YouTube

The above YouTube channel have good puzzles and interview questions, which will definitely enrich your view.

                   (1476) MindYourDecisions - YouTube

Good YouTube channel. We can get the puzzle books of the author in different sites.

                                              PUZZLE BOOKS

Solving puzzles from puzzle book. You might be confused because you have to purchase books, but that is no need. If you type pdfroom or pdfdrive in google you will go to the site, there type puzzle books, you will get many puzzle books there. 

 These are the things and habits done regularly and with a dedicated discipline can increase our IQ and the brain power. Getting the things done with no cost and greater optimization is what this blog post refers to, Hope this post is engaging and interesting.

---------------------                              Comment and share                                                                                                            ----------------

                                  

 

How To Make A telegram Blot using SpringBoot (java)

 To Make a Telegram Bot ,first you have to create a bot in telegram,type BotFather in telegram search 

type /newbot in the telegram (like there in pic)

Here, I gave bot name as (satishbot),has shown in the pic.

we will get the token,like there in above pic ,In the above pic you can see(Use this token HTTP API),there at the botton ,you will see the token.This is all you have to do with telegram App

With the use of Spring Iniatializer create a SpringBoot project

  

The above pic is the package structure of a chatbot application using Eclipse IDE.

The above pic shows classes in the package.I will give the code below of each class in the package

ChatbotApplication main class

Here we have  to register out bot class with telegram

package com.example.chatbot.chatbot;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.telegram.telegrambots.meta.TelegramBotsApi;

import org.telegram.telegrambots.meta.exceptions.TelegramApiException;

import org.telegram.telegrambots.meta.generics.BotSession;

import org.telegram.telegrambots.meta.generics.LongPollingBot;

import org.telegram.telegrambots.meta.generics.TelegramBot;

//import org.telegram.telegrambots.meta.TelegramBotsApi;

//import org.telegram.telegrambots.meta.TelegramBotsApi;

/*import org.telegram.telegrambots.meta.exceptions.TelegramApiException;

import org.telegram.telegrambots.meta.generics.BotSession;

import org.telegram.telegrambots.meta.generics.LongPollingBot;

import org.telegram.telegrambots.updatesreceivers.DefaultBotSession;*/

import org.telegram.telegrambots.updatesreceivers.DefaultBotSession;

import com.example.chatbot.config.TelegramBotConfig;

//import com.pengrad.telegrambot.TelegramBot;

@SpringBootApplication(scanBasePackages={ "com.example.chatbot.config"})

public class ChatbotApplication {

public static void main(String[] args) {

SpringApplication.run(ChatbotApplication.class, args);

///TelegramBot telegramBot = new TelegramBot();

//TelegramBot telegramBot = new TelegramBot();

    try {

        TelegramBotsApi botsApi = new TelegramBotsApi(DefaultBotSession.class);

        botsApi.registerBot(new TelegramBotConfig());

        System.out.println("bot registered successfully");

    } catch (TelegramApiException e) {

        e.printStackTrace();

    }

}

}

TelegramBotConfig :: class code 

package com.example.chatbot.config;

import com.example.chatbot.UserState.UserStateEnum;

import com.pengrad.telegrambot.TelegramBot;

//import com.pengrad.telegrambot.request.SendMessage;

import java.util.HashMap;

import java.util.Map;

//import com.pengrad.telegrambot.TelegramBotAdapter;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.stereotype.Component;

import org.telegram.telegrambots.bots.DefaultAbsSender;

import org.telegram.telegrambots.bots.TelegramLongPollingBot;

import org.telegram.telegrambots.meta.api.methods.send.SendMessage;

import org.telegram.telegrambots.meta.api.objects.Message;

import org.telegram.telegrambots.meta.api.objects.Update;

import org.telegram.telegrambots.meta.api.objects.replykeyboard.ReplyKeyboard;

import org.telegram.telegrambots.meta.api.objects.replykeyboard.ReplyKeyboardRemove;

import org.telegram.telegrambots.meta.bots.AbsSender;

import org.telegram.telegrambots.meta.exceptions.TelegramApiException;

import static  com.example.chatbot.UserState.UserStateEnum.AWAITING_NAME;

import com.example.chatbot.KeyBoardFac.*;

import static com.example.chatbot.UserState.UserStateEnum.FOOD_DRINK_SELECTION;

import static com.example.chatbot.UserState.UserStateEnum.AWAITING_CONFIRMATION;

import static com.example.chatbot.UserState.UserStateEnum.PIZZA_TOPPINGS;

@Component

public class TelegramBotConfig extends TelegramLongPollingBot  {

private final HashMap<Long, UserStateEnum> chatStates =new HashMap<>();

 

@Override

public void onUpdateReceived(Update update) {

String userMessage=update.getMessage().getText();

Long chatId=update.getMessage().getChatId();

SendMessage message = new SendMessage();

   if(userMessage.equalsIgnoreCase("/start")) {

   replyToStart(chatId);

   

  }

  

   if(!userMessage.equalsIgnoreCase("/start")) {

  switch (chatStates.get(chatId)) { case AWAITING_NAME ->

  replyToName(chatId, update); case FOOD_DRINK_SELECTION ->

replyToFoodDrinkSelection(chatId, update);

case PIZZA_TOPPINGS -> 

  replyToPizzaToppings(chatId, update); case AWAITING_CONFIRMATION ->

  replyToOrder(chatId, update); default -> unexpectedMessage(chatId); }

   }

   }

   

@Override

public String getBotUsername() {

return "satred35bot";

}

  @Override public String getBotToken() { return "6467366090:AAE-1eCSTPVhbeu0O0VlqYjODeaOu8_jHWE"; }

 

public void replyToStart(Long chatId) {

try {

SendMessage message=    new SendMessage();

message.setChatId(chatId.toString());

message.setText("Welcome to satishbot ,please enter your name");

execute(message);

chatStates.put(chatId,AWAITING_NAME ); 

}catch (TelegramApiException e) {

        e.printStackTrace();

    }

    

}

private void unexpectedMessage(Long chatId) {

    SendMessage sendMessage = new SendMessage();

    sendMessage.setChatId(chatId.toString());

    sendMessage.setText("I did not expect that.");

    try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

private void replyToName(Long chatId, Update message) {

    promptWithKeyboardForState(chatId, "Hello " + message.getMessage().getText() + ". What would you like to have?",

      KeyboardFactory.getPizzaOrDrinkKeyboard(),

     FOOD_DRINK_SELECTION);

}

private void promptWithKeyboardForState(Long chatId, String text, ReplyKeyboard YesOrNo, UserStateEnum awaitingReorder) {

    SendMessage sendMessage = new SendMessage();

    sendMessage.setChatId(chatId.toString());

    sendMessage.setText(text);

    sendMessage.setReplyMarkup(YesOrNo);

   try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

  chatStates.put(chatId, awaitingReorder);

 }

private void replyToPizzaToppings(Long chatId, Update message) {

    if ("margherita".equalsIgnoreCase(message.getMessage().getText())) {

        promptWithKeyboardForState(chatId, "You selected Margherita Pizza.\nWe will deliver it soon. Thank you!\nOrder again?",

                KeyboardFactory.getYesOrNo(), AWAITING_CONFIRMATION);

    } else if ("pepperoni".equalsIgnoreCase(message.getMessage().getText())) {

        promptWithKeyboardForState(chatId, "We finished the Pepperoni Pizza.\nSelect another Topping",

                KeyboardFactory.getPizzaToppingsKeyboard(), PIZZA_TOPPINGS);

    } else {

        SendMessage sendMessage = new SendMessage();

        sendMessage.setChatId(chatId.toString());

        sendMessage.setText("We don't sell " + message.getMessage().getText() + " Pizza.\nSelect the toppings!");

        sendMessage.setReplyMarkup(KeyboardFactory.getPizzaToppingsKeyboard());

        try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

    }

}

private void replyToFoodDrinkSelection(Long chatId, Update message) {

    SendMessage sendMessage = new SendMessage();

    sendMessage.setChatId(chatId.toString());

    if ("drink".equalsIgnoreCase(message.getMessage().getText())) {

        sendMessage.setText("We don't sell drinks.\nBring your own drink!! :)");

        sendMessage.setReplyMarkup(KeyboardFactory.getPizzaOrDrinkKeyboard());

       try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

    } else if ("pizza".equalsIgnoreCase(message.getMessage().getText())) {

        sendMessage.setText("We love Pizza in here.\nSelect the toppings!");

        sendMessage.setReplyMarkup(KeyboardFactory.getPizzaToppingsKeyboard());

        try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

chatStates.put(chatId, PIZZA_TOPPINGS); 

    } else {

        sendMessage.setText("We don't sell " + message.getMessage().getText() + ". Please select from the options below.");

        sendMessage.setReplyMarkup(KeyboardFactory.getPizzaOrDrinkKeyboard());

       try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

    }

}

private void replyToOrder(Long chatId, Update message) {

    SendMessage sendMessage = new SendMessage();

    sendMessage.setChatId(chatId.toString());

    if ("yes".equalsIgnoreCase(message.getMessage().getText())) {

        sendMessage.setText("We will deliver it soon. Thank you!\nOrder another?");

        sendMessage.setReplyMarkup(KeyboardFactory.getPizzaOrDrinkKeyboard());

       try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

chatStates.put(chatId, FOOD_DRINK_SELECTION); 

    } else if ("no".equalsIgnoreCase(message.getMessage().getText())) {

        stopChat(chatId);

    } else {

        sendMessage.setText("Please select yes or no");

        sendMessage.setReplyMarkup(KeyboardFactory.getYesOrNo());

       try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

    }

}

private void stopChat(Long chatId) {

    SendMessage sendMessage = new SendMessage();

    sendMessage.setChatId(chatId.toString());

    sendMessage.setText("Thank you for your order. See you soon!\nPress /start to order again");

chatStates.remove(chatId); 

    sendMessage.setReplyMarkup(new ReplyKeyboardRemove(true));

   try {

execute(sendMessage);

} catch (TelegramApiException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

class KeyboardFactory code::::

package com.example.chatbot.KeyBoardFac;

import org.telegram.telegrambots.meta.api.objects.replykeyboard.ReplyKeyboard;

import org.telegram.telegrambots.meta.api.objects.replykeyboard.ReplyKeyboardMarkup;

import org.telegram.telegrambots.meta.api.objects.replykeyboard.buttons.KeyboardRow;

import java.util.List;

public class KeyboardFactory {

public static ReplyKeyboard getPizzaToppingsKeyboard() {

KeyboardRow row = new KeyboardRow();

row.add("Margherita");

row.add("Pepperoni");

return new ReplyKeyboardMarkup(List.of(row));

}

public static ReplyKeyboard getPizzaOrDrinkKeyboard(){

KeyboardRow row = new KeyboardRow();

row.add("Pizza");

row.add("Drink");

return new ReplyKeyboardMarkup(List.of(row));

}

public static ReplyKeyboard getYesOrNo() {

KeyboardRow row = new KeyboardRow();

row.add("Yes");

row.add("No");

return new ReplyKeyboardMarkup(List.of(row));

}

}

Enum UserStateEnum

package com.example.chatbot.UserState;

public enum UserStateEnum {

AWAITING_NAME, FOOD_DRINK_SELECTION, PIZZA_TOPPINGS, AWAITING_CONFIRMATION

}

OUTPUT WILL BE LIKE