Scratch

slayerrobe7 · 2012-03-31 15:35:45

i am going threw the java tutorials and on of the projects was to use the computer to find the square root of a number

my code is

Code:

class Root {
    private static Object math;
    public static void main(String[] args) {
       int number = 225;
       System.out.println("The square root of"
               + number
               + "is"
               + math.sqrt(number)
      );        
    }
}

it is not working and i don't know why please help

Jwosty · 2012-03-31 15:39:03

I don't think this really belongs in Scratch, maybe try SO?

ZeroLuck · 2012-03-31 15:40:03

This can't work!
Just do this:

Code:

public class Root {
    public static void main(String[] args) {
       int number = 225;
       System.out.println("The square root of"
               + number
               + "is"
               + Math.sqrt(number)
        );
    }
}

The "math" Object you made is null.
(=> NullPointerException when you use it)
And java.lang.Math is final, you can't make an instance of it.

Last edited by ZeroLuck (2012-03-31 15:41:02)

slayerrobe7 · 2012-03-31 15:43:06

thank you

slayerrobe7 · 2012-03-31 15:53:35

if i have anymore problems ill post here

nickbrickmaster · 2012-03-31 19:17:24

That's because you re-defined math, which actually should have been Math, which you shouldn't have redefined..

Scratch

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#1 2012-03-31 15:35:45

java problems

Code:

#2 2012-03-31 15:39:03

Re: java problems

#3 2012-03-31 15:40:03

Re: java problems

Code:

#4 2012-03-31 15:43:06

Re: java problems

#5 2012-03-31 15:53:35

Re: java problems

#6 2012-03-31 19:17:24

Re: java problems

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