Dec 10, 2008 · What is the main difference between StringBuffer and StringBuilder? Is there any performance issues when deciding on any one of these?

It is supposed to be generally preferable to use a StringBuilder for string concatenation in Java. Is this always the case? What I mean is this: Is the overhead of creating a StringBuilder object,

Jun 4, 2010 · StringBuilder is a mutable class that can be appended to, characters replaced or removed and ultimately converted to a String StringBuffer is the original synchronized version …

May 9, 2011 · But StringBuilder is a bit more intuitive to read and code, and the penalty would not matter for smaller strings. Actually the performance for case 2 is much faster than case 1, …

Mar 4, 2011 · I'm using a StringBuilder in a loop and every x iterations I want to empty it and start with an empty StringBuilder, but I can't see any method similar to the .NET StringBuilder.Clear …

The StringBuilder class is mutable and unlike String, it allows you to modify the contents of the string without needing to create more String objects, which can be a performance gain when …

Jan 26, 2013 · 297 I have a StringBuilder object, StringBuilder result = new StringBuilder(); result.append(someChar); Now I want to append a newline character to the StringBuilder. How …

A StringBuilder object maintains a buffer to accommodate the concatenation of new data. New data is appended to the end of the buffer if room is available; otherwise, a new, larger buffer is …

Using StringBuilder you modify the actual content of the object without allocating a new one. So use StringBuilder when you need to do many modifications on the string.

It also talks about how the GC also helps to reduce costs in this environment. What is the actual performance tradeoffs between using +, StringBuilder or StringBuffer? (In my case it is …