Do not know how to solve this

Hi I'm a new student of java programming. I ran this code, there's a problem but I do not know how to solve it. Please help.

Code:

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public class Q3 {

        double length=5, width=8, height=9, radius=6;

    public static double volume(double length, double width, double height) {

            double box= length * width * height;

            return box;
    }

    public static void main(String[] args){

            System.out.println("The volume of rectangular box is "+ volume());
    }
}

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Pass the parameters to your volume method.

Goldest

Hi I've made amendments to it and it works, thanks Goldest!

System.out.println("The volume of rectangular box is "+ volume(5,8,9));

Initially I put the parameters as

System.out.println("The volume of rectangular box is "+ volume(length,width,height));

Question, is there a way I can pass English words as parameters instead of numbers?

Quote:

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Originally Posted by jaylimix

Hi I've made amendments to it and it works, thanks Goldest!
System.out.println("The volume of rectangular box is "+ volume(5,8,9));
Initially I put the parameters as
System.out.println("The volume of rectangular box is "+ volume(length,width,height));

Question, is there a way I can pass English words as parameters instead of numbers?

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Sure you can as long as you define those English words to be visible variables; here you define three local variables in your main( ... ) method:

Code:

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double length= 5.0;
double width= 8.0;
double height= 9.0;

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Next you can call your method as:

Code:

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System.out.println("The volume of rectangular box is "+ volume(length,width,height));

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kind regards,

Jos

Quote:

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Originally Posted by jaylimix

System.out.println("The volume of rectangular box is "+ volume(length,width,height));

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This should be the proper way. What happened when you tried this?

Quote:

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Originally Posted by goldest

This should be the proper way. What happened when you tried this?

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No, those variables are instance variables but there is no instance.

kind regards,

Jos

Goldest and Jos, when I tried this, it has errors:

Code:

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System.out.println("The volume of rectangular box is "+ volume(length, width, height));
                                                                                          ^
3 errors

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What does this mean?

Quote:

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Originally Posted by JosAH

No, those variables are instance variables but there is no instance.

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Yeah, I know. I actually wanted the OP to come up with "Cannot make a static reference to the non-static field" error. That way he would have learned how to do it. Nothing else. :P:

And yes, having those variables local would resolve the things in first place.

Goldest

Quote:

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Originally Posted by goldest

Yeah, I know. I actually wanted the OP to come up with "Cannot make a static reference to the non-static field" error. That way he would have learned how to do it. Nothing else. :P:

And yes, having those variables local would resolve the things in first place.

Goldest

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Yes true it does comes up with that

non-static variable length cannot be referenced from a static context
System.out.println("The volume of rectangular box is "+ volume(length, width, height));
^

Ya I manage to make it work by adding a static in front of the variable. It's just guessing for me based on the error.

Quote:

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Originally Posted by jaylimix

Yes true it does comes up with that

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Good. Now go back and see what Jos had said in post 4,

Quote:

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Originally Posted by JosAH

here you define three local variables in your main( ... ) method:

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I hope that would make it clear.

Goldest

Quote:

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Originally Posted by jaylimix

Ya I manage to make it work by adding a static in front of the variable. It's just guessing for me based on the error.

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Aahh, well thats another way.

Considering that you are new to Java, I would strongly suggest you to have a look at the common java errors here : Top Ten Errors Java Programmers Make.

Hope that would be beneficial for you. :)-:

Goldest

Ya I got what you guys mean about the define as local variable :(nod): Thanks for the help! Thanks for link too.

You're welcome!

Keep coming back here in case of any further problems. :(grin):

Goldest