[HADOOP-8814] Inefficient comparison with the empty string. Use isEmpty() instead

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.1.1-beta
• Component/s: conf, fs, fs/s3, ha, io, metrics, performance, record, security, util
• Hadoop Flags: Reviewed
• Assignee: Brandon Li
• Reporter: Brandon Li
• Created: 15/Sep/12 20:20
• Updated: 03/Sep/14 23:36
• Resolved: 20/Sep/12 04:06

Description

Prior to JDK 6, we can check if a string is empty by doing "".equals(s) or s.equals("").

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