Method to add and multiply integers

[Scott Howie]

Hi guys, been given this as a college exercise and not quite sure where to start.

Develop a method that accepts as data input three integer numbers,
calculates the sum and the product of the numbers,
and displays the sum and product.

Any help would be greatly appreciated.

[Henry Wong]

Well, I would start at step one, which is ...

Develop a method that accepts as data input three integer numbers

How do you "accept as data input" of an integer?

Henry

[Guillermo Ishi]

Show your best attempt so far so we can see where you're at.

[Scott Howie]

Ok here's what I have so far

public class SequenceChallenge {
	
	int int1_;
    int int2_;
    int int3_;
	
	public SequenceChallenge() {
	
		int1_ = 0;
        int2_ = 0;
        int3_ = 0;
        sum_ = 0;	
		
    public int sumTotal (){
        sum_ = int1_ + int2_ + int3_;
        return sum_;
		}
    }
}

[Jelle Klap]

Valiant first attempt, but unfortunately this won't compile and it doesn't seem to be in line with the assignment.
The method sumTotal() doesn't accept anything as input, nor does it display the result.
For more information on how to pass information to a method, please have a look at this tutorial.
You did get the calculation of the sum right, so points for that! The assignment also speaks of calculating the product which would require the use of a different operator, but is otherwise similar.
This tutorial explains the available operators.

[Campbell Ritchie]

Welcome to the Ranch

How much Java® have you been taught? It would be helpful to know what sort of level they expect you to work at. To continue from what Jelle said, a totalling method is a good thing. You can pass its result to a displaying method. As a general rule of thumb, the smaller a method is, the better.

Style thing: please delete every underscore character because Java® style is only to use underscores in test method names, constant names and package names.

[joey parkker]

I think this may helps you

import java.io.BufferedReader;
import java.io.InputStreamReader;
 
class addtwonumbers_function
{
       // private = local to this class
       private static int addIntegers(int a, int b)
       {
              return (a+b);
       }
 
       public static void main(String[] args)
       {
              // system.in reader (e.g. the input from the console)
              InputStreamReader ISR = new InputStreamReader(System.in);       
              // buffer the console reader
              BufferedReader BR = new BufferedReader(ISR);                     
 
              // the default values for the two numbers
              int val1 = 0;
              int val2 = 0;
              try 
              {
                     // output the question.
                     System.out.print("Enter first number : ");
                     // read in the console intput one line (BR.readLine) and then convert to a integer
                     val1 = Integer.parseInt(BR.readLine());
                     System.out.print("Enter second number : ");
                     val2 = Integer.parseInt(BR.readLine());
              }
              catch (Exception ex)
              {
                     // if the input was a string.
                     System.out.println(ex.toString());
              }
              // output the answer of adding both of the values together
              System.out.println("Answer = " + addIntegers(val1, val2));
       }
}

[Campbell Ritchie]

Welcome to the Ranch

I am afraid that program does not help the OP very much. It shows some very out of date practice, poor exception handling and poor identifiers. It also does not answer the original question in the thread title.