Scanner sc = new Scanner(System.in)

It is a in-build class present in java.util

The inbuilt class is used to take the input from user through console.

Scanner class uses diff input methods:

• nextByte()
• nextShort()
• nextInt()
• nextDouble()
• nextFloat()
• nextBoolean()
• nextLong()

Steps to use scanner class methods

1. Import the scanner class by using import keyword.
2. Create the object of scanner class.
   1. Scanner sc = new Scanner(System.in);
3. Call the Scanner class method by using Scanner object reference variable.

   1. variable.methodName(), eg: sc.nextInt()

   2. Example:

      import java.util.Scanner;
      public class MyScanner {
          public static void main(String[] args) {
              Scanner sc = new Scanner(System.in);
              System.out.println("Enter a number");
              int a= sc.nextInt();
              System.out.println("Your Entered numer is "+a);
          }
      }
      

   3. program to take name, height, weight, mail from user and display it

      import java.util.Scanner;
      public class ScannerDemo {
          public static void main(String[] args) {
              Scanner sc = new Scanner(System.in);
              System.out.println("Enter your name");
              String name = sc.next();
              System.out.println("Enter your Phone number");
              Long phone = sc.nextLong();
              System.out.println("Enter your height");
              Float height = sc.nextFloat();
              System.out.println("Enter your weight");
              Float weight = sc.nextFloat();
              sc.nextLine();
              System.out.println("Enter your mail");
              String mail = sc.next();
              System.out.println("Your name is "+name);
              System.out.println("Your phone number is "+phone);
              System.out.println("Your height is "+height);
              System.out.println("Your weight is "+weight);
              System.out.println("Your mail is "+mail);
              sc.close();
          }
      }