What is the difference between String and StringBuilder in Java?

What is the difference between String and StringBuilder in Java?

In Java, String is immutable, meaning once created, its value cannot be changed. StringBuilder, on the other hand, is mutable, allowing you to modify its content without creating a new object.

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 is more efficient than using String.

What are the performance implications of using String vs StringBuilder?

Using String in a loop can lead to performance issues due to the creation of multiple immutable objects. StringBuilder is more efficient as it modifies the same object.

Are there any other alternatives to StringBuilder?

Yes, you can also use StringBuffer, which is similar to StringBuilder but is synchronized, making it thread-safe.