Date Validation using Jdatechooser

Question

I’m trying to validate two dates in the following case:

I created a Jframe that receives two data fields using Jdatechooser, as shown below:

First field the user informs the shutdown date, second field the user informs the payment date.

Now enter the validation, after placing the second field, I have to do a validation between them, that the payment date can not be longer than 10 days from the date of shutdown.

I was trying to put this validation at the time the user chose the payment date.

I’m trying to do this validation however I’m not getting, I tried to buy using the following code below:

if (txtDataDes.getDate().before(txtDataPg.getDate())) {

Thanks for your help.