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In Java 8, underscore (``++_++``) cannot be used as a parameter to a lambda, and by Java 9, it's a keyword. To ensure future portability (not to mention current readability), it should not be used now as an identifier.
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== Noncompliant Code Example
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[source,java]
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----
private String _; // Noncompliant
----
== Compliant Solution
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[source,java]
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----
private String foo;
----
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ifdef::env-github,rspecator-view[]
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'''
== Implementation Specification
(visible only on this page)
include::message.adoc[]
include::highlighting.adoc[]
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'''
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== Comments And Links
(visible only on this page)
include::../comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
