Java: StringUtils.join on an ArrayList returns NoSuchMethodError Exception -


I have an ArrayList that I would like to connect with a delimiter of ',' I have read here in some answers that StringUtils. Joint is a good choice but the problem is that when I try to join an ArrayList, I get the following error: 

  java.lang.NoSuchMethodError: org.apache. Commons.lang.StringUtils. Ljava / Lang / string; (C Ljava / util / archive);

Code: 

  Array list & lt; String & gt; Friends list = new Array's & lt; String & gt; (); . . . StringUtils.join (Friends list, ',');

What am I missing?

When I am coding with Netbeen, I do not warn this error, this is when I try to compile.

You have an older version of Commons-Lang, get the latest version, which has this method.

Alternatively, you can call StringUtils.join (friendsList.toArray (), ',')


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