Jul 23, 2025 · Whether a substring contains all unique characters or not can be checked in linear time by scanning it from left to right and keeping a map of visited characters.

Jan 8, 2024 · In this tutorial, compare ways to find the longest substring of unique letters using Java. For example, the longest substring of unique letters in “CODINGISAWESOME” is …

The solution uses a sliding window technique with two pointers (l and r) to maintain a window of non-repeating characters. A counter tracks character occurrences within the current window. …

In Java, substrings are part of the string which contains the continuous character of the string of any length from 1 to complete string. We are given a string and we have to find the length of …

In this blog post, we'll explore a common string processing problem: finding the length of the longest substring without repeating characters. This problem is a classic example of the sliding …

Jul 9, 2022 · In this tutorial, you will learn how to write a java program to find longest substring without repeating characters. For example, if a string is “TEXT”, the longest substring in …

May 21, 2025 · Java exercises and solution: Write a Java program to find the length of the longest substring of a given string without repeating characters.

Longest Substring Without Repeating Characters - Given a string s, find the length of the longest substring without duplicate characters. Example 1: Input: s = "abcabcbb" Output: 3 …

The brute-force idea is to try starting a substring at every index and keep extending it until we see a repeated character. For each starting point, we use a set to track the characters we’ve seen …

Jul 10, 2016 · Write a java program or function to find the longest substring without repeating characters in a given string. For example, if “ javaconceptoftheday ” is the input string, then the …