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Tag: stringbuilder

Java CharAt() and deleteCharAt() performance

I’ve been wondering about the implementation of charAt function for String/StringBuilder/StringBuffer in java what is the complexity of that ? also what about the deleteCharAt() in StringBuffer/StringBuilder ? Answer For String, StringBuffer, and StringBuilder, charAt() is a constant-time operation. For StringBuffer and StringBuilder, deleteCharAt() is a linear-time operation. StringBuffer and StringBuilder have very similar performance characteristics. The primary difference is

String, StringBuffer, and StringBuilder

Please tell me a real time situation to compare String, StringBuffer, and StringBuilder? Answer Mutability Difference: String is immutable, if you try to alter their values, another object gets created, whereas StringBuffer and StringBuilder are mutable so they can change their values. Thread-Safety Difference: The difference between StringBuffer and StringBuilder is that StringBuffer is thread-safe. So when the application needs