What is the difference between using the concat method and the + operator for Java string concatenation?

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If you’re looking for a simple and easy-to-read way to perform Java string concatenation, the + operator is your best friend:

String fullName = "John" + " " + "Doe";

:white_check_mark: Why use this?

  • More readable than concat method.
  • Compiler optimizes simple + operations, making them efficient.
  • Works well for a few concatenations.

:rotating_light: When to avoid?

If you’re concatenating strings in a loop, + creates new objects each time, leading to performance issues.