[ARROW-6289] [Java] Add empty() in UnionVector to create instance

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/16852
• Assignee: Ji Liu
• Reporter: Ji Liu
• Created: 18/Aug/19 15:33
• Updated: 11/Jan/23 07:46
• Resolved: 21/Aug/19 16:32

Description

Currently complex type vectors all have empty() API to create instance except UnionVector.

Issue Links

• links to: GitHub Pull Request #5115