Thread: ()Method cannot be applied to ()

So, after two days of trying to figure out the problem, I've decided to come to the experts for advice. Here is my code:

import java.util.Scanner;
 
public class Quiz7
{
	public static void main(String[] args)
	{
			String radius;
			Scanner keyboard = new Scanner(System.in);
			String programName;
			String dueDate;
			System.out.print("What is the name of the program? ");
			programName=keyboard.nextLine();
			System.out.print("What is the due date of the program? ");
			dueDate=keyboard.nextLine();
			int iMenuInput = 0;
			final double PI = 3.1416f;
			displayMyInfo(programName, dueDate);
			menu();	
			AreaCircle();
 
 
			}//end of main
 
	public static void displayMyInfo(String programName, String dueDate)
	{
			System.out.print("The program name is" +programName);
			System.out.print("The due date of the program is" +dueDate);
	}//end of displayMyInfo
 
 
	public static int menu()
	{
		Scanner kb2 = new Scanner(System.in);
		int iMenuInput;
		System.out.print("* * * * * * * * M E N U * * * * * * * *");
		System.out.print("\n\n1>   Area of a circle");
		System.out.print("\n2>    Circumference of a circle");
		System.out.print("\n3>    Area of a rectangle");
		System.out.print("\n4>   Perimeter of a rectangle");
		System.out.print("\n5>    Volume of a box");
		System.out.print("\n6>    Volume of a cone");
		System.out.print("Enter your choice ");
		iMenuInput=kb2.nextInt();
		System.out.print ("  OR 2, OR 3, OR 4, ETC");
		return iMenuInput;
	}//end of menu
 
	public static double AreaCircle(int radius)
	{
		final double PI = 3.1416f;
		double dAreaCircle;
 
		dAreaCircle = PI * radius * radius;
 
		return dAreaCircle;
 
	}//end of areaCircle
 
	public static double circumference(int radius)
	{
		final double PI = 3.1416f;
		float fCircumference;
		fCircumference = (float)(2 * PI * radius);
		return fCircumference;
	}//end of circumference
 
	public static int areaRectangle(int length, int width)
	{
		int iAreaRectangle;
		iAreaRectangle = length * width;
		return iAreaRectangle;
	}//end of areaRectangle
 
	public static int perimeterRectangle(int length, int width)
	{
		int iPerimeterRectangle;
		iPerimeterRectangle = 2 *(length * width);
		return iPerimeterRectangle;
	}//end of perimeterRectangle
 
	public static int volumeBox(int length, int width, int height)
	{
		int iVolumeBox;
		iVolumeBox = length * width * height;
		return iVolumeBox;
	}//end of volumeBox
 
	public static double volumeCone(int radius, int height)
	{
		final double PI = 3.1416f;
		float fVolumeCone;
		fVolumeCone = (float)(PI*radius*radius*radius*height)/3.0f;
		return fVolumeCone;
	}//end of volumeCone
 
 
 
 
 
 
}//end of Quiz7

The problem seems to lie on line 19, with the error: AreaCircle(int) in Quiz7 cannot be applied to ()
AreaCircle();

Thanks for your help in advance!

I don't have that much Java experience but what the error is saying is that the method needs an int in the () of the method. Your instance method is:

	public static double AreaCircle(int radius)   //specifically the (int radius) parameter
	{
		final double PI = 3.1416f;
		double dAreaCircle;
 
		dAreaCircle = PI * radius * radius;
 
		return dAreaCircle;
 
	}//end of areaCircle

Basically, you need to put an integer into your method because you set a parameter for it. I'm pretty sure AreaCircle(); =/= AreaCircle(parameter(s)); since adding parameters would make them separate methods, despite having the same name.

So, on line 19, I need to specify that it is an integer in the parentheses?

Alright, thank you. It is now telling me that I am missing a .class on the same line. How would I go about fixing this. And thank you again for your quick replies.

Originally Posted by CrimsonFlash

So, on line 19, I need to specify that it is an integer in the parentheses?

Well, pretty much, I think. In your case, since you wanted the method to calculate the area of a circle given a radius, when you call it, it basically wants an integer (or radius), to use in the calculation. Since you call the method using AreaCircle(); the program is looking for a method called AreaCircle() with no parameter instead of the AreaCircle(int radius). So when you do call the method, you have to either put a specific value or you can use a variable for a user inputted integer.

Example:

int x = 0;
AreaCircle(x);
//or it would be
AreaCircle(0);

but for your situation, I'd recommend setting an int variable to equal a user input, kind of like how you did in your menu method.

*ahh KevinWorkman answered because I was so slow
*anyways, it's pretty much what he said

import java.util.Scanner;
 
public class Quiz7
{
	public static void main(String[] args)
	{
			String radius;
			Scanner keyboard = new Scanner(System.in);
			String programName;
			String dueDate;
			System.out.print("What is the name of the program? ");
			programName=keyboard.nextLine();
			System.out.print("What is the due date of the program? ");
			dueDate=keyboard.nextLine();
			int iMenuInput = 0;
			final double PI = 3.1416f;
			displayMyInfo(programName, dueDate);
			menu();	
			areaCircle(int);
 
 
	}//end of main
 
	public static void displayMyInfo(String programName, String dueDate)
	{
			System.out.print("The program name is" +programName);
			System.out.print("The due date of the program is" +dueDate);
	}//end of displayMyInfo
 
 
	public static int menu()
	{
		Scanner kb2 = new Scanner(System.in);
		int iMenuInput;
		System.out.print("* * * * * * * * M E N U * * * * * * * *");
		System.out.print("\n\n1>   Area of a circle");
		System.out.print("\n2>    Circumference of a circle");
		System.out.print("\n3>    Area of a rectangle");
		System.out.print("\n4>   Perimeter of a rectangle");
		System.out.print("\n5>    Volume of a box");
		System.out.print("\n6>    Volume of a cone");
		System.out.print("Enter your choice ");
		iMenuInput=kb2.nextInt();
		System.out.print ("  OR 2, OR 3, OR 4, ETC");
		return iMenuInput;
	}//end of menu
 
	public static double areaCircle(int radius)
	{
		final double PI = 3.1416f;
		double dAreaCircle;
 
		dAreaCircle = PI * radius * radius;
 
		return dAreaCircle;
 
	}//end of areaCircle
 
	public static double circumference(int radius)
	{
		final double PI = 3.1416f;
		float fCircumference;
		fCircumference = (float)(2 * PI * radius);
		return fCircumference;
	}//end of circumference
 
	public static int areaRectangle(int length, int width)
	{
		int iAreaRectangle;
		iAreaRectangle = length * width;
		return iAreaRectangle;
	}//end of areaRectangle
 
	public static int perimeterRectangle(int length, int width)
	{
		int iPerimeterRectangle;
		iPerimeterRectangle = 2 *(length * width);
		return iPerimeterRectangle;
	}//end of perimeterRectangle
 
	public static int volumeBox(int length, int width, int height)
	{
		int iVolumeBox;
		iVolumeBox = length * width * height;
		return iVolumeBox;
	}//end of volumeBox
 
	public static double volumeCone(int radius, int height)
	{
		final double PI = 3.1416f;
		float fVolumeCone;
		fVolumeCone = (float)(PI*radius*radius*radius*height)/3.0f;
		return fVolumeCone;
	}//end of volumeCone
 
 
 
 
 
 
}//end of Quiz7

As Kevin requested, here is my code. Thanks

In our Java class, we are working with UML statements, so I have to stick to calling the methods like that. Unless I'm missing something, of course.

Do you think you could paste the error message? Also, for the areaCircle(int); I didn't mean to literally put "int" in there but to put an integer value, either an int variable or value like in my previous post.