Valid Palindrome II version 2

ValidPalindromeIIV2.java

// Need an intermediate Result class to return multiple values from a function
public class Result{
    public boolean isPalindrome = false;
    public int diffStartIndex = 0;
    public int diffEndIndex = 0;

    public Result(boolean isPalindrome, int diffStartIndex, int diffEndIndex) {
        this.isPalindrome = isPalindrome;
        this.diffStartIndex = diffStartIndex;
        this.diffEndIndex = diffEndIndex;
    }
}

public Result isPalindromeGenericHelper(String s, int start, int end) {
    while (start < end) {
        if (s.charAt(start) == s.charAt(end)) {
            start++;
            end--;
            continue;
        }
        return new Result(false, start, end);
    }
    return new Result(true, start, end);
}

public boolean validPalindrome(String s) {
    // Just remember to add your VM params with -ea in your run configuration
    assert s != null && s.length() > 0 : "Invalid input string s";

    Result res = isPalindromeGenericHelper(s, 0, s.length()-1);
    if (res.isPalindrome) {
        return true;
    }
    return isPalindromeGenericHelper(s, res.diffStartIndex + 1, res.diffEndIndex).isPalindrome ||
            isPalindromeGenericHelper(s, res.diffStartIndex, res.diffEndIndex - 1).isPalindrome;
}