Check if a String Has All Unique Characters in Java

Date: 2023-08-16

This Java tutorial explores four methods for determining if a string contains only unique characters. It covers a brute-force approach (O(n²)), a sorting method, using a HashSet (O(n)), and employing Java Streams. The tutorial analyzes the time complexity and efficiency of each, highlighting the HashSet approach as generally preferable for larger strings due to its linear time complexity. The use of Apache Commons Lang's StringUtils is also briefly discussed. Choosing the best method depends on factors like string length, code readability, and performance requirements.

Read more: https://examples.javacodegeeks.com/java-unique-string-check/