rspec/rules/S2131/java/rule.adoc

== Why is this an issue?

"Boxing" is the process of putting a primitive value into a primitive-wrapper object. When that's done purely to use the wrapper class' ``++toString++`` method, it's a waste of memory and cycles because those methods are ``++static++``, and can therefore be used without a class instance. Similarly, using the ``++static++`` method ``++valueOf++`` in the primitive-wrapper classes with a non-``++String++`` argument should be avoided.


=== Noncompliant code example

[source,java]
----
int myInt = 4;
String myIntString = (new Integer(myInt)).toString(); // Noncompliant; creates & discards an Integer object
myIntString = Integer.valueOf(myInt).toString(); // Noncompliant
----


=== Compliant solution

[source,java]
----
int myInt = 4;
String myIntString = Integer.toString(myInt);
----


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== Implementation Specification
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== Comments And Links
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