Java Scanner

We use the Scanner class to take input from users.

To use Scanner, we must add the line

Import java.util.Scanner;

At the beginning of our program.

This imports the Scanner class Inside Our program.

Create Scanner Object:

Once the Scanner class is imported, we need to create an object from it.

Scanner input = new Scanner (System.in);

Here, input is an object of Scanner which will be used to take input. The System. In specifies we will take input from the standard input (keyboard).

Note: We will learn about objects and classes in detail in the upcoming lessons.

Take int input

● We use the nextInt() method of the Scanner class to take an integer input from the user.

Notice the line

Int data = input.nextInt();

● It takes integer input from the user and stores it to the data variable.

And, the line

Input.close();

Closes Scanner. It’s a good practice to close Scanner after it is used.

import java.util.Scanner; 

class Main { 

public static void main(String[] args) { 

// create object of Scanner 

Scanner input = new Scanner(System.in); 

System.out.println( "Enter an integer:"); 

// take int input 
          
int data = input.nextInt(); 

System.out.println( "Input Data: " + data); 

// close Scanner 
          
input.close(); 

} 
} 
/*Output:

Enter an integer: 

27 

Input Data: 27 */

Take input from he user

Java Scanner

Take int input

Quiz

Question Text