Incorrect 'DateTimeFormat' pattern

Reports incorrect date time format patterns.

The following errors are reported:

Unsupported pattern letters, like "TT"
Using reserved characters, like "#"
Incorrect use of padding
Unbalanced brackets
Incorrect amount of consecutive pattern letters

Examples:

  DateTimeFormatter.ofPattern("[][]]"); // Closing ']' without previous opening '['
  DateTimeFormatter.ofPattern("TT"); // Illegal pattern letter 'T'
  DateTimeFormatter.ofPattern("{"); // Use of reserved character '{'
  DateTimeFormatter.ofPattern("MMMMMM"); // Too many consecutive pattern letters 'M'

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

IncorrectDateTimeFormat

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Probable bugs

New in 2022.3

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024