string builder vs string buffer
String vs StringBuilder vs StringBuffer: String: Immutable version char sequences StringBuilder: mutable version char sequences, not synchronized StringBuffer: mutable version char sequences, synchronized , thread-safe, slow String str = new String("a") StringBuilder s2 = new StringBuilder("B") // MUTABLE StringBuffer s2 = new StringBuffer("c") // Synchronized
string vs stringbuilder vs stringbuffer
If a string is going to remain constant throughout the program, then use the String class object because a String object is immutable. If a string can change (for example: lots of logic and operations in the construction of the string) and will only be accessed from a single thread, using a StringBuilder is good enough. If a string can change and will be accessed from multiple threads, use a StringBuffer because StringBuffer is synchronous, so you have thread-safety. If you don’t want thread-safety than you can also go with StringBuilder class as it is not synchronized.
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