Question

Question 1. Write a complete main method that does the following: 1. Takes 2 command line arguments, both integers. 2. If there are not 2 arguments, throw an IllegalArgumentException with an appropriate message. 3. Otherwise, output, to the console, the sum and product of those numbers, each on a different line. For example, C:>java Question2 12 5 12 5

Answer 1

public class Question2 {

public static void main(String[] arguments) {

if (arguments.length == 2) {

int firstInteger = Integer.parseInt(arguments[0]);

int secondInteger = Integer.parseInt(arguments[1]);

System.out.println(firstInteger + " + " + secondInteger + " = " + (firstInteger + secondInteger));

System.out.println(firstInteger + " * " + secondInteger + " = " + (firstInteger * secondInteger));

} else {

throw new IllegalArgumentException();

}

}

}

Step-by-step explanation:

• Inside the main method, check whether the length of arguments is equal to 2, and then store the arguments in the variables called firstInteger and secondInteger respectively.
• The next step is to display the sum and product of both firstInteger and secondInteger inside the if block.
• Otherwise, if the length of arguments is not equal to 2, then throw an IllegalArgumentException.