Thread: Printing the method return from another class

i cant get the return value to my Printer class from the Calculator class method.

Please explain. What happens? If there are error messages, copy the full text and paste it here.

[QUOTE]ObjectFunctionality.java:24: error: cannot find symbol[/QUOTE
The compiler can not find a declaration for the variable: sum that is in scope (declared within the same {}s) on line 24.
Where is sum declared? Its declaration needs to be in scope at line 24.

There is a variable: sum declared in the Calculator class but that is not in scope because it is in a different class.

Note: Java naming conventions state that method names should start with lowercase letters. Sum and Print should be sum and print.
Also method names should be verbs that describe what the method does.

how to get that sum value from the Calculator class

The sum method returns the sum of the two int values passed to it.
The calling code needs to save the value returned by the sum method in a variable so that it can work with it locally:

   int theSum = Calculator.sum(num1, num2);   // call sum method and save its results in theSum

class Printer {
	static int Print() {
 
	Scanner reader = new Scanner(System.in);
 
	System.out.println("Type in the first integer: ");
	int num1 = reader.nextInt();
	System.out.println("Type in the second interge: ");
	int num2 = reader.nextInt();
 
	Calculator.sum(num1, num2);
 
	int theSum = Calculator.sum(num1, num2);
	System.out.println("Sum of the numbers: " + theSum);
	}	
}

Why does the code call the sum method two times?

The print method is declared to return an int value but there is no return statement that returns any value.
What is the value the print method is supposed to return?
Should the print method be declared as returning void and not int?

Our posts crossed. Check my last post

ye i forgot to put on // on that line Calculator.sum(num1, num2);, so the compiler ignores my statement and use yours. but oh my god.. changing static int print() { to static void print() { did it, now it works...
since days i was caught up on other parts of the code and totally ignored this very line when i started to understand about objects chapter. thanks man for ruling that one out!! finally i can move on in the exercises xd

btw: that was the example code after i put my code into, so i could see theirs:

import java.util.Scanner;
 
public class ObjectFunctionality {
    public static void main(String args[]) {
        Printer thing = new Printer();
        thing.Print();
    }
}
class Printer {
    int firstNumber, secondNumber, result;
    Scanner reader = new Scanner(System.in);
    Calculator counter = new Calculator();
 
 
    Printer() {
        System.out.print("Type in the first integer: ");
        firstNumber = reader.nextInt();
        System.out.print("Type in the second integer: ");
        secondNumber = reader.nextInt();
        result = counter.Sum(firstNumber, secondNumber);
    }
 
    public void Print() {      
        System.out.println("Sum of the numbers: " + result);
    }
}
class Calculator {
    static int Sum(int first, int second) {
        int sum = first + second;
        return sum;
    }
}