Steps for attaching scanner

• What is Scanner?

  • A class that represents text-based parser.

  • It can parse text data from any source console input,text file, socket, string.

  import java.util.*;
  //OR 
  import java.util.Scanner;

• Create instance of Scanner class

  • constructor: Scanner(InputStream in)

  • stdin: System.in

  Scanner sc=new Scanner(System.in);

• To check data type of input type currenly present in the input strream use

    boolean hasNextInt();
    boolean hasNextByte();
    boolean hasNextLong();
    //and so on... 

• To read data

  int nextInt() throws InputMismatchException
  double nextDouble() throws InputMismatchException
  String next();
  String nextLine();
  boolean nextBoolean();
  //and so on...