Как решить?

package com.javarush.task.task02.task0217;

/*
Минимум четырех чисел
*/
public class Solution {
    public static int min(int a, int b, int c, int d) {
         int result ;
    if (a < b);
          result = a;
          else result = b;
    if (b < c);
          result = b;
          else result = c;
    if (c < d);
          result = d;
          else result = c;
          return result;



    }

    public static int min(int a, int b) {
         int result ;
         if (a < b)
             result = a;
         else
             result = b;
         return result;

    }

    public static void main(String[] args) throws Exception {
        System.out.println(min(-20, -10));
        System.out.println(min(-20, -10, -30, -40));
        System.out.println(min(-20, -10, -30, 40));
    }
}