Thread: Recursion Stackoverflow Error help!

public class Project02
{
	private double areaTotal;
	public Project02(double Total)
	{
		areaTotal = Total;
	}
		public static double TotalArea(double areaTotal)
		{		
			double []x = {7.5774, 6.4226, 4.3453, 3.4226, 4.5724, 6.6547};
			double []y = {4.6340, 6.3660, 6.2321, 4.3660, 2.6340, 2.7679};
 
			double a1 = (x[0] * y[1] + x[1] * y[2] + x[2] * y[0] - y[0] * x[1] - y[1] * x[2] - y[2] * x[0])/2;
			double a2 = (x[0] * y[2] + x[2] * y[3] + x[3] * y[0] - y[0] * x[2] - y[2] * x[3] - y[3] * x[0])/2;
			double a3 = (x[0] * y[3] + x[3] * y[4] + x[4] * y[0] - y[0] * x[3] - y[3] * x[4] - y[4] * x[0])/2;
			double a4 = (x[0] * y[4] + x[4] * y[5] + x[5] * y[0] - y[0] * x[4] - y[4] * x[5] - y[5] * x[0])/2;
 
			double []a = {a1, a2, a3, a4};
 
			double result;
			if(areaTotal == 0 && areaTotal > 3)
				{
				result = 0;
				System.out.println("Done");
				}
			else
				{
				result = a[(int)areaTotal] + TotalArea(a[(int)areaTotal - 1]);
				System.out.println(result);
				}
				return result;
	}
}

DRIVER

import java.util.Scanner;
 
public class Project02Driver
{
	public static void main(String []args)
	{
		int areaTotal;
		Scanner scan = new Scanner(System.in);
		areaTotal = scan.nextInt();
		System.out.println(Project02.TotalArea(areaTotal));
	}
}

I run this program using the driver class. However, every time I input a number for areaTotal I get a stackoverflow error. My end goal in this program is to be able to use recursion to successfully print the total in array a using my driver program.

Not sure if it's the problem, but i found something suspicious. Look at the following statement. What are you trying to achieve here?

		if(areaTotal == 0 && areaTotal > 3)

When would this return true and when would this return false?