SCANNER

SCANNER

                                Import java.uti.Scanner because the Scanner class is inside util package of java library. Than we create reference (object) of class Scanner named s. "System.in" This is the predefine library which allow user to enter value in any variable at run time through keyboard. We can say same as scanf() in c and cin >> in c++.

Now in Scanner class there are so many different different methods for scaning different type of values.

In-built methods of Scanner class for scanning different types of values.

1. nextByte()  for scanning byte type value.

2. nextShort()  for scanning short type value.

3. nextInt() for scanning int type value.

4. nextLong() for scanning long type value.

5. nextFloat() for scanning floting point value.

6. nextDouble() for scanning double type value.

7. next() for scanning a string.

Prog.

import java.util.Scanner;

public class ScannerTest

{

    public static void main(String[] args)

    {

        Scanner s = new Scanner(System.in); // Here we initialize object s for Scanner class.  

        System.out.print("Enter the first value a : ");

        int a = s.nextInt();    // Scan int type value

        System.out.print("Enter the second value b : ");

        int b = s.nextInt();    // Scan int type value

        int sum = a + b;

        System.out.println("The addition of a and b : a + b = "+sum);

    }

}Output :

C:\java> javac ScannerTest.java

C:\java> java ScannerTest

Enter the first value a : 5

Enter the second value b : 6

The addition of a and b : a + b = 11

Anurag