Calling a parameterised method from another class

Question

I have written a method in one class and wish to call it in another, i.e print the result. Here is the method's class:

public class squareRoot {

    public double absoluteValue(double x){
        if (x < 0)
            x = -x;
        return(x);
    }

    public double squareRoot(double x){
        double epsilon  = .00001;
        double guess    = 1.0;

        while(absoluteValue(guess * guess - x) >= epsilon)
            guess = (x / guess + guess) / 2.0;
        return guess;
    }
}

The second class is a simple gui class and I wish to call the squareRoot method. I obtain the user input and then try to print the function, like this (with x being the user input in the gui class). However it is not working

 squareRoot(x);

Please give more details as to the manner in which it is not working. Are you getting an error, a wrong calculation, compilation error etc? Also please show how you are instantiating the squareRoot class and using it — Rob McFeely
– Rob McFeely, Commented May 12, 2016 at 7:58
@RobMcFeely I created an object of the squareRoot class, squareRoot obj; — robinhood46
– robinhood46, Commented May 12, 2016 at 8:00

Sanjeev · Accepted Answer · 2016-05-12 07:56:16Z

3

Declare your method as static

public static double squareRoot(double x)

and then call it by

System.out.println(squareRoot.squareRoot(x));

answered May 12, 2016 at 7:56

Sanjeev

9,9762 gold badges24 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

codex · Accepted Answer · 2016-05-12 08:28:33Z

0

Be careful with static approaches, in more complex systems you'd have to think twice before declaring a static.

I recommend creating a instance for this purpose squareRoot sqr = new squareRoot();

You can then access the class method by e.g. sqr.squareRoot(int value)

answered May 12, 2016 at 8:28

codex

456 bronze badges

Collectives™ on Stack Overflow

Calling a parameterised method from another class

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related