// Ask user for name, 
// then greet that person.

// Obtain input with the Scanner class.
// Show output with printf method.

import java.util.Scanner;
public class Greeter2
{
    public static void main(String[] args)
    {
        // Create Scanner object.
        Scanner console = new Scanner(System.in);

        // Declare name.
        String name;

        // Display prompt.
        System.out.print("Enter your name: ");

        // Input name.
        name = console.next( );

        // Show message box with greeting.
        System.out.printf("Hello, %s.", name);
    }
}

// Prompt on console:
Enter your name:

// Sample input to keyboard:
Bob

// Output message to console:
Hello, Bob.