//The following line is needed to get a number from the keyboard.
import java.util.Scanner;

public class Input {
	public static void main(String[] args) {

		System.out.print("Please click in the Console, ");
		System.out.print("type a number, and press ENTER: ");
		int i = getInt();	//Get a number from the keyboard.

		System.out.print("Type another number, and press ENTER: ");
		int j = getInt();
		System.out.println("The sum is " + (i + j) + ".");
	}

	//The following 8 lines are needed to get an integer from the keyboard.
	private static int getInt() {
		final Scanner scanner = new Scanner(System.in);
		if (scanner.hasNextInt()) {
			return scanner.nextInt();
		}
		System.err.println("Expected an integer.");
		return 0;
	}
}