Difference between StringBuffer and StringBuilder classes in Java

The main difference between StringBuffer and StringBuilder in Java is that StringBuffer is thread-safe and synchronized while StringBuilder is not. This means that StringBuffer is slower in performance compared to StringBuilder in scenarios where multiple threads are accessing the object simultaneously.

Therefore, if you are working in a single-threaded environment, it is recommended to use StringBuilder for better performance. However, if thread safety is a concern, then you should use StringBuffer to ensure data integrity.

Remember to choose the appropriate class based on your application's specific requirements to optimize performance and maintain data consistency.