Web Reference: Jul 23, 2025 · Working with strings is a typical activity in Java programming, and sometimes we need to remove duplicate characters from a string. In this article we have given a string, the task is to remove duplicates from it. Do you just want to 'collapse' repeating characters, or remove duplicates entirely. That is, should "abba" result in "aba" or "ab"? Convert the string to an array of char, and store it in a LinkedHashSet. That will preserve your ordering, and remove duplicates. Something like: char[] chars = string.toCharArray(); for (char c : chars) { Jan 16, 2026 · How to Remove Duplicate Characters from a String in Java: Best Methods and Examples String manipulation is a fundamental task in Java programming, and one common requirement is removing duplicate characters from a string.
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