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1. Thread Safety:
– StringBuffer is thread-safe, meaning it ensures that multiple threads can safely access and modify its contents without interference. This is achieved by synchronizing access to its methods, which introduces a performance overhead.
– StringBuilder, on the other hand, is not thread-safe. It does not provide any synchronization mechanisms, making it faster but unsuitable for concurrent access from multiple threads.
2. Performance:
– StringBuffer has slightly slower performance compared to StringBuilder due to the overhead of synchronization. This makes it preferable for scenarios where thread safety is required, such as in multi-threaded environments.
– StringBuilder is faster because it does not incur the synchronization overhead of StringBuffer. It is suitable for use in single-threaded or non-concurrent environments where maximum performance is desired.