Search results
Dec 10, 2008 · The difference is that StringBuffer is synchronized and StringBuilder is not. Although, StringBuilder is faster than StringBuffer, the difference in performance is very little. StringBuilder is a SUN's replacement of StringBuffer. It just avoids synchronization from all the public methods.
Jun 4, 2010 · Thread-Safety Difference: The difference between StringBuffer and StringBuilder is that StringBuffer is threadsafe. So when the application needs to be run only in a single thread, then it is better to use StringBuilder. StringBuilder is more efficient than StringBuffer. Situations: If your string is not going to change use a String class ...
Jan 26, 2013 · In addition to K.S's response of creating a StringBuilderPlus class and utilising ther adapter pattern to extend a final class, if you make use of generics and return the StringBuilderPlus object in the new append and appendLine methods, you can make use of the StringBuilders many append methods for all different types, while regaining the ability to string string multiple append commands together, as shown below
Mar 4, 2011 · 34. If you look at the source code for a StringBuilder or StringBuffer the setLength () call just resets an index value for the character array. IMHO using the setLength method will always be faster than a new allocation. They should have named the method 'clear' or 'reset' so it would be clearer.
Aug 3, 2010 · As of Java 8, the String class has a static method join.The first argument is a string that you want between each pair of strings, and the second is an Iterable<CharSequence> (which are both interfaces, so something like List<String> works.
The problem with String concatenation is that it leads to copying of the String object with all the associated cost. StringBuilder is not threadsafe and is therefore faster than StringBuffer, which used to be the preferred choice before Java 5. As a rule of thumb, you should not do String concatenation in a loop, which will be called often.
Sep 29, 2016 · In Java the assignment operator is = and the reassignment term is usually applied to scope variables (e.g. sb = new StringBuffer()). So, generally speaking, your question is a bit incorrect, because the only answer you can get is sb = new StringBuffer("testString") -- you probably wouldn't ask a bountified question about such sort of things.
Mar 26, 2011 · Beyond the simple question (StringBuffer is more efficient than "+" and thread-safe, and StringBuilder is faster than StringBuffer but no thread-safe) I would like to know when to use them. (Important: I know the differences between them; this is a question related to the architecture of the platform and some design decisions.)
1. Other answers have mentioned that StringBuilder should be used when you are creating a string in a loop. However, most of the loops are over collections and from Java 8 the collections can be transformed to Strings using the joining method from Collectors class. As an example, in the next code:
May 9, 2011 · I took few ways of growing strings in this; 1) Append to StringBuilder, 2) Insert to front of StringBuilder as as shown by @Mehrdad, 3) Partially insert from front as well as end of the StringBuilder, 4) Using a list to append from end, 5) Using a Deque to append from the front. .sequential() .forEach(i -> {.
