Java Program to Find Maximum Area of Quadrilateral

import java.io.*;
class Main
{
    public static void main(String[] args)
    {
        //values for the 4 sides are declared
        int a = 2;
        int b = 3;
        int c = 2;
        int d = 3;
        //find semi perimeter
        int s = (a+b+c+d)/2;
        //find max area
        double Maxarea  = Math.sqrt((s-a)*(s-b)*(s-c)*(s-d));
        System.out.println("The max area of quadrilateral is: " + Maxarea);
    }
}

Output:

The max area of quadrilateral is: 6.0