Java fresher interview question:Area of triangle

public class Areaoftriangle
{
    public static void main(String[] args)
    {
    int a=50,b=30,c=30;
    if (((a+b)>c)&&((b+c)>a)&&((c+a)>b))
    {
        double s;
        s=(a+b+c)/2;
        double area;
        area=Math.sqrt(s*(s-a)*(s-b)*(s-c));
        double S=Math.floor(area);
        System.out.println("area is:"+ S);
    }
    else
    {
        System.out.println("Triangle is not possible");
    }
}

}