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Thread: How do I call a variable from another method?

  1. #1
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    Default How do I call a variable from another method?

    My code has a method where the users input a bunch of variables and then those variables get added together in a new variable. What I want to know is how do I call the variable that is in the other method to another method?

    import java.util.*;
     
    public class Calc{
    	public static void main (String [] args){
    	determinevalue1();
    	determinevalue2();
    	determineTotalvalue(double value1, double value2);
    	}
     
    	public static double determinevalue1(){
    	 Scanner console = new Scanner(System.in);
    	 System.out.println("Enter your first number");
    	double v1 = console.nextDouble();
    	System.out.println("Enter your next number");
    	double v2 = console.nextDouble();
    	double vtotal = 365 * (v1 / v2);
    	value1 = 2.3 * vtotal;
    	return value1;
    	}
     
    	public static double determinevalue2(){
    	 Scanner console = new Scanner(System.in);
    	 System.out.println("Enter your first number");
    	double v1 = console.nextDouble();
    	System.out.println("Enter your next number");
    	double v2 = console.nextDouble();
    	double vtotal = 365 * (v1 / v2);
    	value2 = 2.3 * vtotal;
    	return value1;
    	}
    	public static double determineTotalvalue(){
    	double totalvalue = (value1 + value2) / 1000;
    	System.out.println(totalvalue);
    	return totalvalue;
    	}
     
    	}
    Last edited by brandon236; October 3rd, 2014 at 06:28 PM.


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    Default Re: How do I call a variable from another method?

    Welcome to the forum! Please read this topic to learn how to post code in code or highlight tags and other useful info for new members.

    Show us the code and the error. Please post your code correctly using code or highlight tags per the above link.

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    Default Re: How do I call a variable from another method?

    So I figured out that you can declare a new variable and assign it to the method like
    x = determinevalue1(int 3, int 4);
    but the problem with that is my values result from scanner inputs from the user so how can I do that but make it so the values are from the user?

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    Default Re: How do I call a variable from another method?

    the problem with that is my values result from scanner inputs from the user so how can I do that but make it so the values are from the user?
    Huh? It sounds like you've done what you're asking for help to do.

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    Default Re: How do I call a variable from another method?

    Uhm, declare the variables u need outside of all the methods and u can change and access them in all methods.

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    Default Re: How do I call a variable from another method?

    Quote Originally Posted by Resantic View Post
    Uhm, declare the variables u need outside of all the methods and u can change and access them in all methods.
    I tried that but it didn't work. It keeps saying "Cannot find symbol".

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    Default Re: How do I call a variable from another method?

    Post the code that gives that error with the full text of the error.

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    Default Re: How do I call a variable from another method?

    Hello!
    You have to declare the variables to be avalible for the whole class. That means you have to declare them outside all functions and variables.
    Put all variables in the on top of the class, like this:

    public class DemonstrationExample {
        // DECLARE VARIABLES HERE, BELOW ALL METHODS AND EVENTUALLY ANY SUB CLASSES
        private static int integerNumber = 2;
        private static String text;
        private static float floatingPointNumber;
     
        // DECLARE YOUR METHODS BELOW THE VARIABLE DECLARATIONS
        public static void changeAllVariables() {
            text = "Hello World";
            integerNumber = 5;
            floatingPointNumber = 2.23;
        }
     
        public static void printAllVariables() {
            System.out.println(text + ", " + integerNumber + ", " + floatingPointNumber);
        }
     
        public static void main(String[] args) {
            changeAllVariables();
            printAllVariables();
        }
    }

    By declaring the variables below everything else in the class, they will be accesable in the whole class.

    Some keywords when declaring variables:
    public: Variables declared as public can be accessed from other classes.

    private: Variables declared as private can only be accessed from the class which it is declared in.

    static: Variables declared as static can be accessed from static methods, classes etc.

    final: Variables declared as final can not be changed.

    Hope that helps!
    /TheDDestroyer12

  9. #9

    Default Re: How do I call a variable from another method?

    - public class Practise {
    String a;

    public String getA() {
    return a;
    }
    public void setA(String a) {
    this.a = a;
    }
    void meth1(){

    a="asd";

    // System.out.println(a);



    }
    void meth2(){
    // String as=getA();
    String b="qwerty";
    System.out.println(a+""+b);

    }


    public static void main(String[] args) {

    Practise p= new Practise();
    p.meth1();
    p.meth2();
    }

    }

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