rspec/rules/S3009/java/rule.adoc

It's slightly more efficient to append single characters to ``++StringBuffer++`` and ``++StringBuilder++`` instances as ``++char++``s, than as ``++String++``s. That is, it's more efficient to put a single ``++char++`` in single quotes, rather than double quotes.


== Noncompliant Code Example

[source,java]
----
StringBuilder sb = new StringBuilder();

sb.append("a"); // Noncompliant
----


== Compliant Solution

[source,java]
----
StringBuilder sb = new StringBuilder();

sb.append('a'); // Noncompliant
----


ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::message.adoc[]

'''
== Comments And Links
(visible only on this page)

include::comments-and-links.adoc[]
endif::env-github,rspecator-view[]