Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.albasani.net!.POSTED!not-for-mail From: Lew Newsgroups: comp.lang.java.programmer Subject: Re: The behavior of "equals" method of Arrays.asList() implementation Date: Tue, 28 Jun 2011 07:29:06 -0400 Organization: albasani.net Lines: 24 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.albasani.net 0HbtENW09cwUY0MVwGxTpiHz1p676a+w5/F1s7215tYdIg/0MggHSlwFL+xlkK9XMBcmd+g6xw+/W+FHW+HcJeag/IStmMDkTBiKUQGJ0l6xIgrIo6+//OHCKVTIKInB NNTP-Posting-Date: Tue, 28 Jun 2011 11:28:48 +0000 (UTC) Injection-Info: news.albasani.net; logging-data="HwTQmvzZDpFO+S1LLmGS34IcfCuS4oI+bjqFsV1BZRcx2Iyo8bDNEK1KvcH8BioKQMUXOIXfwqdBsyo9/4ELKD1PpW6PT9hJDnStlvWwjrHPRcxgchYrKV8auRQ4XOjr"; mail-complaints-to="abuse@albasani.net" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110424 Thunderbird/3.1.10 In-Reply-To: Cancel-Lock: sha1:vSv7d7jucF9QM1rHWtew9OfBsFM= Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:5728 Eric Sosman wrote: > Alex J wrote: >> Basically I wonder if it is safe to use equals for collections (and >> junit's assertEquals in particular which in fact results in the >> *.equals invocation). >> >> One of collection instances I am working with is returned from >> Arrays.asList(..) method invocation. >> Sun JDK sources defines no equals method for >> java.util.Arrays.ArrayList inner class so I guess it is not safe to >> compare collections in that way. > > Look again. The nested class extends AbstractList, and > inherits the equals() implementation from it. Not only that, but so of course it worked, and it had better be safe or the implementation is fubared. -- Lew Honi soit qui mal y pense. http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg