CODEWITHSUNDEEP
javamethods
Gen
Gen

Reputation: 11

How to assign a variable to the return statement of a static method?

I cant seem to get the value of the second method please teach me how I'm still a beginner at this. Do I have to use a different variable? And if so how do I assign the return value of that method to the said variable? 

import java.util.Scanner ;

class JavaChip
{

    static Scanner s = new Scanner(System.in) ;
    static double val ;


    public static void main( String[] args )
    {
        displayLine () ;
        System.out.print ("Enter number of cups of Mocha JavaChip: ");
        val = getMocha( s.nextDouble() ) ;
        System.out.print ("The grams of mocha is: " + val ) ;

        System.out.print ("\nThe grams of sugar is: " + val ) ;
        displayLine () ;
    }

    static double getMocha ( double c )
    {
        return ( 1.215 * c ) ;
    }

    static double getSugar (double c)
    {
        val = ( 0.15 * c ) ;
        return val ;
    }

    static void displayLine()
    {
        System.out.println("\n\n[][][][][][][][][][][][][][][][][][][]") ;
        System.out.println("[][][][][][][][][][][][][][][][][][][]") ;
    }

}

Upvotes: 0

Views: 18776

Answers (3)

Android Killer
Android Killer

Reputation: 18489

Your code is 100% correct.Just you are not calling that getSugar(double value) method. Just do the same as you did for getMocha(double value).Then you can get the return value.

Upvotes: 1

Naor
Naor

Reputation: 24063

Actually you should saparate your project into two files:
1. File that will include the main function and helper functions of display like displayLine.
2. File that wil represent the business of your project (JavaChip?).

Example:

Program.java:

class Program
{
    public static void main( String[] args )
    {
        displayLine () ;
        System.out.print ("Enter number of cups of Mocha JavaChip: ");
        Scanner s = new Scanner(System.in) ;
        JavaChip jc=new JavaChip();
        double val = jc.getMocha( s.nextDouble()) ;
        System.out.print ("The grams of mocha is: " + val ) ;
        val = jc.getSugar( s.nextDouble());
        System.out.print ("\nThe grams of sugar is: " + val ) ;
        displayLine () ;
    }

    static void displayLine()
    {
        System.out.println("\n\n[][][][][][][][][][][][][][][][][][][]") ;
        System.out.println("[][][][][][][][][][][][][][][][][][][]") ;
    }
}

JavaChip.java:

class JavaChip
{
    public JavaChip()
    {

    }

    public double getMocha ( double c )
    {
        return ( 1.215 * c ) ;
    }

    public double getSugar (double c)
    {
        val = ( 0.15 * c ) ;
        return val ;
    }
}

Upvotes: 1

Peter Lawrey
Peter Lawrey

Reputation: 533492

If you want to use the value of a method you have to call it.

val = getSugar(num);

Using static fields to pass arguments or return values is bad practice. This is likely to cause confusion and be a cause of subtle multi-threaded bugs. Its also more complex than just returning the value like you do with getMocha()

Upvotes: 5

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