[ARROW-15722] [Java] Improve error message for ListVector with wrong number of children

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 8.0.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/20121
• Assignee: Bryan Cutler
• Reporter: Bryan Cutler
• Created: 17/Feb/22 18:47
• Updated: 11/Jan/23 11:39
• Resolved: 22/Feb/22 22:13

Description

If a ListVector is made without any children, the error message will say "Lists have only one child. Found: []".

The wording could be improved a little to let the user know what went wrong.

Issue Links

• links to: GitHub Pull Request #12456