подскажите пожалуйста почему не работает?
package com.javarush.task.pro.task12.task1205;
/*
Метод деления
*/
public class Solution {
public static void main(String[] args) {
divide(1, 0);
divide(-1, 0);
divide(0, 0);
divide(100, 20);
divide(200, 20);
}
public static void divide(double a, double b) {
if ((a>0 && b==0)||(a==Double.NEGATIVE_INFINITY && b>=0 )
|| (a==Double.NEGATIVE_INFINITY && b<0 && b!=0))
{System.out.println(Double.POSITIVE_INFINITY);}
else if ((a<0 && b==0)||(a==Double.NEGATIVE_INFINITY && b>=0 &&
b!=Double.POSITIVE_INFINITY)||(a==Double.POSITIVE_INFINITY && b<0 &&
b!=Double.NEGATIVE_INFINITY))
{System.out.println(Double.NEGATIVE_INFINITY);}
else if ((a==0 && b==0)||(a==Double.NaN || b==Double.NaN)||
(a==Double.POSITIVE_INFINITY && b==Double.POSITIVE_INFINITY)||
(a==Double.POSITIVE_INFINITY && b==Double.NEGATIVE_INFINITY)||
(a==Double.NEGATIVE_INFINITY && b==Double.POSITIVE_INFINITY)||
(a==Double.NEGATIVE_INFINITY && b==Double.NEGATIVE_INFINITY))
{System.out.println(Double.NaN);}
else {System.out.println(a/b);}
}
}