Не понимаю в чем ошибка
package com.javarush.task.task07.task0701;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/*
Массивный максимум
*/
public class Solution {
public static void main(String[] args) throws Exception {
int[] array = initializeArray();
int max = max(array);
BufferedReader reader = new BufferedReader (new InputStreamReader(System.in));
for (int i = 0; i < array.length; i++)
{
String s = reader.readLine();
array[i] = Integer.parseInt(s);
}
System.out.println(max);
}
public static int[] initializeArray() throws IOException {
int [] num = new int [20];
return null;
}
public static int max(int[] array) {
int a = 0;
int b = 0;
int c = 0;
for (int i = 0; i< array.length;i++)
{
if (a>=b)
{
b = a;
a = array[i];
if (i== array.length)
{
c = b;
}
}
}
return c;
}
}