Need help to finish this netbeans program?

Question

I had a review and im stuck on this last question.I got a few but I don't know how to finish this. Any help would be appreciated. Im just trying to finish this so I can study it.
So far I have
//Program to input 2 numbers through the keyboard and print their sum and product
package slproject
import java.util.*;
Public class main{
Public static void main(String[]) args)
double x,y;

The rest I have to plug in are
System.out.println("x="+x):
x=a.nextDouble();
System.out.println("y="+y);
y=b.nextDouble();
Scanner b= new Scanner(System.in);
System.out.println("Please enter a value for x:");
System.exit(0);
{System.out.println("The product of "+ x +" and "+ y +"="+(x*y));
{System.out.println("The sum of "+ x +" and "+ y +"="+(x+y));
System.out.println("Please enter a value for y:");
Scanner a = new Scanner(System.in)

Answer 1

Luke, I gather you have all the instructions needed in the program but need to put them in the correct order for the program to do what it is supposed to do.

It may help you to keep in mind the usual flow of a small program like this:

1) the program asks the user (prints) to provide the values that it needs

2) the program reads (scans) the values provided by the user

3) the program performs the required computations

4) the program provides the user with the results of the computations (prints)

5) the program stops

 

Comments:

 

1) and 2) are usually repeated for each value needed.

 

If 3) does not actually require much work, 3) is sometimes combined with 4).

 

The last instruction of a program does not need to be an explicit stop; a program normally stops anyway when it runs out of instructions.

 

This program creates two scanners where one would have sufficed. Multiple scanners are needed only if the input is coming from multiple sources, like the user's keyboard and a file.

 

Good luck!