package logicProgramme;

import java.util.Scanner;

public class Scanner_Class_ReadIntegerValue {


// read the number from standard input 

    public static void main(String[] args) {
        int num;
        // print the message to ask the user to enter number
        System.out.println("Enter the integer: ");

        // Scanner class import from utility package.
        //create Scanner object. 
        Scanner  s = new Scanner(System.in);
        //create scanner object s ,to take input from keyboard (System.in)

        //read the input form the user and store it  in num.
        num = s.nextInt();

        System.out.println("Entered interger is: "+ num);

        // closes the scanner to free up the resourse.
        s.close();


    }

}

package logicProgramme;

public class ReadInetegerWithoutScanner {


    // read the number from  without scanner class


    public static void main(String[] args) {
    if (args.length >0) // check the  user entered input or no.
    {
        int num =Integer.parseInt(args[0]);
        // Integer.parseInt(args[0]); , Integer.parseInt -> it is convert  string to integer, args[0] , index of  array 0 the postion take the input 
        // parse mean read and  convert , int means integer - string to int convert 
        // example:-i entered arg tab 123 and it String args output 45  
        // in eclipse right click file -> runs as -> run configuration -> argument tab  give nput and apply and run.

        // simple Integer ,java class  in java.lang package parseInt
        //Integer -> class ,  parseInt method,

        System.out.println("Entered integer is: "+num);
    }
    else
    {
        System.out.println("No integer entered");
    }
    }

}

/*int to String convert 
 * String.valueof();
 * 
 * 
 * /
 */

package logicProgramme;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class UsingBufferedReaderClass {
// how to use BufferReader to read a line of input from the user and print it to the console.
    public static void main(String[] args) throws IOException {

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String input  =reader.readLine();

        System.out.println(input);


    }

}
/*
 * 1.Bufferedreader -> Bufferedreader in java class read the text from the charater(not byte )  input stream. 
 * 
 * system.in read the byte from the keyboard  not characters.(system.in  can not directely  read string or line -only raw bytes)
 * 
 *2.InputStreamReader -> it is a bridge b/w System.in (bytes)  and java character
 * it is convert to  byte to character, so help full for  read text from keyboard.
 * 
 * 3.readline() it method  of Bufferereader, it ead one full line of text and it is return a string 
 */

/*BufferedReader it  java class read the text chracter not bytes, system.in  , 
 * it read  input from keyboard like byte not a character, Inputstreamreader is it help convert byte to character ,and read text in keyboard and , it bridge b/w  (system.in)  byte and character, and readLine() methdod of  Bufferereader class,it reade the  text line
 * 
 * 
 */