Contents - Cultural View

String Buffer 282
As well, the shortcomings of arrays are inherent in a StringBuffer. In order to insert or remove characters are
arbitrary positions, whole sections of arrays must be moved.
The method by which a StringBuffer is attractive in an environment with low processing power takes this ability by
using too much memory, which is likely also at a premium in this environment. This point, however, is trivial,
considering the space required for creating many instances of Strings in order to process them. As well, the
StringBuffer can be optimized to "waste" as little memory as possible.
The StringBuilder class, introduced in J2SE 5.0, differs from StringBuffer in that it is unsynchronized. When only a
single thread at a time will access the object, using a StringBuilder is more efficient than using a StringBuffer.
StringBuffer and StringBuilder are included in the java.lang package.
In .NET
Microsoft's .NET Framework has a StringBuilder class in its Base Class Library.
See also
• Analysis of algorithms
Links
• The JavaDocs of StringBuffer [1] , StringBuilder [2] and String [3] , as well as the article StringBuffer and
StringBuilder.
• The source code of these classes [4]
• Urban Performance Legends [5] - An article which involves a discussion of immutable objects with respect to
object-oriented design
References
[1] http:/ / java. sun. com/ j2se/ 1. 5. 0/ docs/ api/ java/ lang/ StringBuffer. html
[2] http:/ / java. sun. com/ j2se/ 1. 5. 0/ docs/ api/ java/ lang/ StringBuilder. html
[3] http:/ / java. sun. com/ j2se/ 1. 5. 0/ docs/ api/ java/ lang/ String. html
[4] http:/ / www. java2s. com/ Code/ JavaAPI/ java. lang/ StringBuffer. htm
[5] http:/ / www-128. ibm. com/ developerworks/ java/ library/ j-jtp04223. html?ca=dgr-lnxw01JavaUrbanLegends