I am experimenting with writing a java class for financial engineering (hobby of mine). The algorithm that I desire to implement is:

100 / 0.05 = 2000

Instead I get:

100 / 0.05 = 2000.9999999999998

I understand the problem to be one with converting from binary numbers to decimals (float --> int). I have looked at the BigDecimal class on the web but have not quite found what I am looking for.

Attached is the program and a class that I wrote:

// DCF class

public class DCF    {
    double rate;
    double principle;
    int period;

    public DCF(double $rate, double $principle, int $period)    {
        rate = $rate;
        principle = $principle;
        period = $period;
    }
    // returns the console value
    public double consol()  {
        return principle/rate;
    }
        // to string Method
    public String toString()    {
        return "(" + rate + "," + principle + "," + period + ")";
    }
}

Now the actual program:

// consol program

public class DCFmain {
    public static void main(String[] args)  {
        // create new DCF
        DCF abacus = new DCF(0.05, 100.05, 5);
        System.out.println(abacus);
        System.out.println("Console value= " + abacus.consol() );   
    }
}

Output:

(0.05,100.05,5)
Console value= 2000.9999999999998

Thanks!