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🔁 Find and Print Duplicate Characters in a String (Java)

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🔁 Find and Print Duplicate Characters in a String (Java)

Welcome to this walkthrough on how to find duplicate characters in a string using Java! This solution is simple, effective, and perfect for interviews, automation tools, or data validation tasks. What Is a Duplicate Character? A character is considered a duplicate if it appears more than once in a string. In this approach: We treat uppercase ...

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