Cannot Find Symbol

[Promisha]

I'm trying to finish this assignment and I have one little issue I cant get to go away

import java.util.Scanner;

final class Circle
{

Scanner stdIn = new Scanner (System.in);

private double diameter;
private double radius;
private double circumfrence;
private double pi = 3.14159;


public Circle(int newRadius, int newCircumfrence)
{
setRadius(newRadius);
}

public int getRadius()
{
System.out.println("Please Enter a positive number for the Radius");
radius = stdIn.nextInt( );

return (int) (double) radius;
}

public int getCircumfrence()
{
return (int) (double) (pi*2*radius);
}

public void setRadius(double newRadius)
{
radius = newRadius;
}

public void setCircumfrence(int newCircumfrence, int Circumfrence)
{
Circumfrence = newCircumfrence;
}

public double getArea()
{
return pi*(radius*radius);
}

public double getDiameter()
{
return radius*2;
}

}

public class CircleDemo
{
public static void main(String args[])
{
int circle = 0;


Circle circ = new Circle(); //ERROR HERE

System.out.println("Area is: " + circ.getArea());
System.out.println("Cicumfrence is: " + circ.getCircumfrence());
System.out.println("Diameter is: " + circ.getDiameter());



}
}


Just above on the line Circle Circ = new circle();

Netbeans says:
Cannot Find Symbol
Symbol: Constructor Circle()
location: class circle


I'm new to this type of thing, and frankly, I suck. :(
Any Suggestions to how I get rid of this and get it to compile?

[Solarsonic]

In your Circle constructor you require 2 ints as parameters. When you tried creating a Circle object you didn't supply the required parameters.

[Promisha]

In your Circle constructor you require 2 ints as parameters. When you tried creating a Circle object you didn't supply the required parameters.

Sorry but could you be a bit more specific as to what I need to do? I have issues understanding all this stuff :(

[sunde887]

The default constructor is supplied by the compiler if you don't provide any constructors. The second you provide a constructor the compiler stops providing a default constructor. You are attempting to create a circle with a default constructor that doesn't actually exist.

A default constructor is one that does not take any arguments.

[Promisha]

The default constructor is supplied by the compiler if you don't provide any constructors. The second you provide a constructor the compiler stops providing a default constructor. You are attempting to create a circle with a default constructor that doesn't actually exist.

A default constructor is one that does not take any arguments.

I have no idea what you just said :confused:

[sunde887]

If you don't know what I said I suggest you read your text book or the java tutorials. What I said was not very advanced. Read up on what a constructor is and what I said should make more sense, if it doesn't make more sense after some reading, come back and let me know and I will help you out.

[Solarsonic]

I have no idea what you just said :confused:

Ok, as Sunde said, I would advise you learn about object-oriented programming (considering Java is the most OO language and this is very important stuff.)

But let me show to you simply:

You made a constructor like this:

public Circle(int param1, int param2)

But when you called the constructor to create a new Circle object, you didn't supply the parameters you specified in your constructor (the two ints).

This is what you did:

Circle c = new Circle();

Here is what you should be doing to satisfy the requirements of your constructor:

int a;
int b;
Circle c = new Circle(a, b);

[Promisha]

Still can't get it to work. We just barely talked about OOP last class and I'm just confused. I just want exactly what I need to do to get this to work. I just wanted to try programming and I don't really understand or like it and am already planning on switching my major to something I do enjoy and understand.

I dont understand what you meant for satisfying the constructor. (the int a; int b; ) because I didn't type a Circle C = new Circle.

I see Public Circle (int newRadius, int newCircumfrence) in the top part and Circle circ = new circle() on the bottom part.

Sorry not trying to annoy or anything but I really picked the wrong thing for me to try.


EDIT: Hold on, I got it. Thanks for help.

[sunde887]

It's not that hard, you can definitely understand it just google constructors and you should get a decent understanding. You need to code a new constructor which does not take any arguments or supply two arguments to the constructor at the bottom.

[Solarsonic]

Still can't get it to work. We just barely talked about OOP last class and I'm just confused. I just want exactly what I need to do to get this to work. I just wanted to try programming and I don't really understand or like it and am already planning on switching my major to something I do enjoy and understand.

I dont understand what you meant for satisfying the constructor. (the int a; int b; ) because I didn't type a Circle C = new Circle.

I see Public Circle (int newRadius, int newCircumfrence) in the top part and Circle circ = new circle() on the bottom part.

Sorry not trying to annoy or anything but I really picked the wrong thing for me to try.


EDIT: Hold on, I got it. Thanks for help.

Your welcome. If you have any more problems feel free to post.

[Junky]

Actually researching parameters would more help as the same problem will be encountered when they use methods.