Which should be preferred between String and StringBuffer when there are many updates required to the data?

Question

Accepted Answer

String should be preferred for frequent updates due to its immutability.

String is immutable, so every update creates a new instance, leading to memory overhead.
StringBuffer is mutable and allows for efficient updates without creating new instances.
Use StringBuffer when frequent updates are required to avoid unnecessary memory allocation.
Example: StringBuffer is preferred for building dynamic strings in loops.

Accepted Answer

String is immutable, meaning every modification (like concatenation) creates a new object in memory.

Frequent updates using String lead to performance issues, increased memory usage, and garbage collection overhead.

StringBuffer and StringBuilder are mutable, allowing changes to the same object without creating new ones.

StringBuffer is thread-safe (synchronized), making it suitable for multi-threaded applications.

StringBuilder is not thread-safe but offers better performance in single-threaded scenarios due to the lack of synchronization.

For many updates in single-threaded environments, StringBuilder is preferred.

For many updates in multi-threaded environments, StringBuffer is preferred.

Therefore, prefer StringBuffer (or StringBuilder) over String when the data requires many modifications.

Accepted Answer

StringBuffer.

Accepted Answer

It is recommended to use StringBuilder whenever possible because it is faster than StringBuffer. However, if the thread safety is necessary, the best option is StringBuffer objects

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