Example: "𝄞" (musical symbol) is stored as two char values in Java. A naive HashSet approach might fail. Performance: Java’s String.charAt (i) is O (1), but unchecked constraints could let O (n²) ...

A collection of Java programs and practice problems focused on arrays and strings, covering traversal,basic searching, sorting, manipulation, and common interview questions for beginners. - SarvanB ...

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