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Date: Sun, 16 Sep 2012 07:21:07 +1100 (NCT)
From: "Brandon Li (JIRA)" <jira@apache.org>
To: common-dev@hadoop.apache.org
Message-ID: <1511209515.84742.1347740467721.JavaMail.jiratomcat@arcas>
Subject: [jira] [Created] (HADOOP-8814) Inefficient comparison with the
 empty string. Use isEmpty() instead
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Brandon Li created HADOOP-8814:
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             Summary: Inefficient comparison with the empty string. Use isEmpty() instead
                 Key: HADOOP-8814
                 URL: https://issues.apache.org/jira/browse/HADOOP-8814
             Project: Hadoop Common
          Issue Type: Improvement
          Components: conf, fs, fs/s3, ha, io, metrics, performance, record, security, util
            Reporter: Brandon Li
            Assignee: Brandon Li
            Priority: Minor


Prior to JDK 6, we can check if a string is empty in 2 ways:

   * if(s != null && s.length() == 0)
   * if(("").equals(s)) or if( s.equals(""))

Starting from JDK 6, String class has a new convenience and efficient method isEmpty() to check string's length.

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