[jira] [Created] (LOG4J2-2270) Strings::join, when called with [null] returns "null" instead of EMPTY

[Cyril Martin (JIRA)]

Cyril Martin created LOG4J2-2270:
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             Summary: Strings::join, when called with [null] returns "null" 
instead of EMPTY
                 Key: LOG4J2-2270
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2270
             Project: Log4j 2
          Issue Type: Bug
          Components: API
    Affects Versions: 2.10.0
            Reporter: Cyril Martin


The 
[javadoc|https://logging.apache.org/log4j/2.x/log4j-api/apidocs/org/apache/logging/log4j/util/Strings.html#join(java.util.Iterator,%20char)]
 states "Null objects [...] within the iteration are represented by empty 
strings".

But when there is exactly one element, Strings::join do not test if it is null.

{code} Strings.join(Arrays.asList((String)null), '.') {code}
returns "null" where I expected EMPTY ("")



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