I want to use a JTextField to enter dates in the YYYY-MM-DD format. Is there a possibility to validate the entered format?

CodePudding user response：

You are asking about Input Validation. Do this yourself with an event listener that is triggered

• either whenever the field content changes,
• or when the field loses focus
• or when the dialog's ok button is pressed

Which mechanism you use depends on how quickly you want to give feedback and how costly a validation is.

As an alternative you can refer to the Swing Frameworks Input Validation features.