0680-valid-palindrome-ii.java

class Solution {
    public boolean validPalindrome(String s) {
        int i = 0, j = s.length() - 1;
        while(i < j)
            if(s.charAt(i) == s.charAt(j)) {
                i += 1;
                j -= 1;
            }else
                return validPalindromeUtil(s, i + 1, j) || validPalindromeUtil(s, i, j - 1);
        return true;
    }
    
    boolean validPalindromeUtil(String s, int i, int j) {
        while(i < j)
            if(s.charAt(i) == s.charAt(j)) {
                i += 1;
                j -= 1;
            } else {
                return false;
            }
        
        return true;
    }
}