code to find longest substring with unique K characters not working for all inputs

Question

Given a String, \"\"aabbcdeeeeggi\" and k=3, the code should find longest substring with maximum of k unique characters. For the above input, it should be \"deeeeggi\".

Answer 1

Your implementation does not work the way as expected, is because the original python solution has bug. I made some modifications to your code. Hope it's now all right:

public class SubStringWithKUniqueCharacters {

    public static void main(String[] args){

        System.out.println(longestSubStringWithUniqueK("aabbcdeeeeggi", 3));
        System.out.println(longestSubStringWithUniqueK("aabbcdeeeeggi", 2));
    }

    public static String longestSubStringWithUniqueK(String input, int k){
        int len = input.length();
        Set unique = new HashSet<>();

        int i = 0;
        int j = 0;
        int count = 0;
        int maxStartIndex = 0;
        int maxEndIndex  = 0;
        int maxLen = 0;
        char[] inputArr = input.toCharArray();

        while (i maxLen){
                maxStartIndex = i;
                maxEndIndex = j;
                maxLen = maxEndIndex - maxStartIndex;
            }
            // 1. if we reach the end of the string, we're done.
            if (j + 1 > len){
                break;
            }
            // 2. changed to count <= k here
            else if (count<= k && j

The output now is:

deeeegg
eeeegg