== Why is this an issue?

Creating temporary primitive wrapper objects only for `String` conversion or the use of the `compareTo()` method is inefficient.

Instead, the static `toString()` or `compare()` method of the primitive wrapper class should be used.


=== Noncompliant code example

[source,java,diff-id=1,diff-type=noncompliant]
----
private int isZero(int value){
    return Integer.valueOf(value).compareTo(0); // Noncompliant
}
private String convert(int value){
    return Integer.valueOf(value).toString(); // Noncompliant
}
----


=== Compliant solution

[source,java,diff-id=1,diff-type=compliant]
----
private int isZero(int value){
    return Integer.compare(value, 0); // Compliant
}
private String convert(int value){
    return Integer.toString(value); // Compliant
}
----



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

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

=== Message

Call the static method {wrapperClass}.[toString(...)|compare(...)} instead of instantiating a temporary object.


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

=== on 29 Jul 2013, 15:21:20 Freddy Mallet wrote:
Is implemented by \http://jira.codehaus.org/browse/SONARJAVA-246

=== on 16 Aug 2013, 14:29:29 Dinesh Bolkensteyn wrote:
\[~freddy.mallet] You can't use {primitiveWrapperClass} in the rule description ;-)

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