<ul data-eligibleForWebStory="true"><li>Using StringBuilder to turn a list into a comma-separated string is efficient and memory-friendly compared to string concatenation with + in Java.</li><li>StringBuilder holds data in a character array, avoiding constant object churn and ensuring fast processing even with longer inputs.</li><li>String.join method in Java simplifies joining strings with a delimiter and handles adding the delimiters between items automatically, suitable for cleaner code.</li><li>String.join automatically handles empty lists and different delimiters for various contexts, making it versatile.</li><li>Both StringBuilder and String.join provide ways to create comma-separated strings, with StringBuilder offering manual control and String.join automating the process.</li><li>String.join does not tolerate null values in the input list or array, requiring data cleaning before usage to avoid exceptions.</li><li>In summary, choosing between StringBuilder and String.join depends on the level of control needed and the cleanliness of the input data.</li></ul>

Turning a Java List into a Comma-Separated String

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