567. Permutation in String

567. Permutation in String
https://www.youtube.com/watch?v=wpq03MmEHIM&t=14s

https://leetcode.com/problems/permutation-in-string/solution/

Sliding Window
  Try use int[] array




Line 12: error: illegal start of type


class Solution {
    public boolean checkInclusion(String s1, String s2) {
    int[] array1 = new int[26];   /////// int[] , not char[]
    int[] array2 = new int[26];
    for(int i = 0; i < s1.length(); i++){
      array1[s1.charAt(i) - 'a']++;     //////// char - ‘a’ = a number, ‘a’ - ‘a’ = 0, ‘b’ - ‘a’ = 1 
      array2[s2.charAt(i) - 'a']++;
      }
    }
    
    for(int i = s1.length() - 1; i < s2.length - 1; i++){    /////// range 
      if(match(array1, array2){
        return true;
      }
      // - prev
      array2[s2.charAt(i + 1 - s1.length()) - 'a']--;    ///// index , easy to mess up
      // + new 
      array2[s2.charAt(i + 1) - 'a']++;
    }
    return match(array1, array2);
    
    
    private boolean (int[] array1, int[] array2){
      for(int i = 0; i < 26; i++){
       if(array1[i] != array2[i]){
        return false;
      }
      return true;
    }
    
}