Что не так? Строка 27-ая

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);
        System.out.println(max);
    }

    public static int[] initializeArray() throws IOException {
          BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
 int[] k = new int[20];
for ( int i = 0; i<=k.length-1; i++){
 k[i] = Integer.parseInt(reader.readLine());}
        return k;
    }

    public static int max(int[] array) {
       int max = k[0];
for ( int i = 0; i<k.length; i++){
if (max<k[i])
max = k[i];}
        return max;
    }
}