import java.util.*;

public class AddFourRobust
{
	public static void main( String args[] )
	{
		Scanner console = new Scanner( System.in );
		System.out.print("Input an integer: ");
		if ( console.hasNextInt() )
		{
			int userInput = console.nextInt();
			System.out.println("\nFour more than your number is " + ( userInput + 4 ) );
		}
		else
		{
			System.out.println("\nThat wasn’t an integer!");
		}
	}
}