What is the difference between String and StringBuilder in Java?

What is the difference between String and StringBuilder in Java?

In Java, a String is immutable, meaning once created, it cannot be changed. StringBuilder, on the other hand, is mutable and allows modifications.

Can you give me an example of when to use StringBuilder?

Sure! Use StringBuilder when you need to perform many string manipulations, like concatenation in a loop, as it's more efficient.

What are the performance implications of using String vs StringBuilder?

Using String can lead to performance issues due to the creation of multiple immutable objects. StringBuilder is more efficient for frequent modifications.

Are there any thread-safety concerns with StringBuilder?

Yes, StringBuilder is not synchronized, so it's not thread-safe. If you need thread safety, consider using StringBuffer instead.