Yes! Much has changed. Here's a good summary: https://stackoverflow.com/questions/46512888/how-is-string-concatenation-implemented-in-java-9 https://stackoverfl

Yes! Much has changed. Here's a good summary: https://stackoverflow.com/questions/46512888/how-is-string-concatenation-implemented-in-java-9 https://stackoverflow.com/questions/46512888/how-is-string-c... The change in question is JEP 280.