有没有人帮忙看看 java初学者

import java.util.*;
public class A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        System.out.println(Area(a, b, c));
    }
    public static double Area(int a,int b,int c){
        double s = (a + b + c) / 2;
        return Math.sqrt(s*(s-a)*(s-b)*(s-c));
    }

}