1736. Latest Time by Replacing Hidden Digits.java

class Solution {
    public String maximumTime(String time) {
        char[] array = time.toCharArray();
        if (array[0] == '?') {
            if (array[1] == '?') {
                array[0] = '2';
                array[1] = '3';
            } else {
                if (array[1] <= '3')
                    array[0] = '2';
                else
                    array[0] = '1';
            }
        }
        if (array[1] == '?') {
            if (array[0] == '2')
                array[1] = '3';
            else
                array[1] = '9';
        }
        if (array[3] == '?')
            array[3] = '5';
        if (array[4] == '?')
            array[4] = '9';
        return new String(array);
    }
}