How to receive user date through JTextField, using JodaTime?

Try to make this account using LocalDate , parsing the string with DateTimeFormatter :

  String strDate = "30/08/2016";
  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
  LocalDate dataVencimento = LocalDate.parse(strDate, formatter);

  LocalDate dataHoje = LocalDate.now();

  long daysBetween = ChronoUnit.DAYS.between(dataHoje, dataVencimento);

  System.out.println(daysBetween);

The code above, if executed today (07/31/2016), will display 30. If negative, it is because the second date is less than the first date passed in DAYS.between .

See working at ideone .

References :

Java SE 8 Date and Time (oracle)

Calculate days between two dates in Java 8

Thanks in advance, your response was helpful, although I have managed to solve it differently, it was just a matter of logic itself.

private JTextField dia;
private JTextField mes;
private JTextField ano;

container.add(new JLabel("Dia"));
container.add(dia);
container.add(new JLabel("Mês"));
container.add(mes);
container.add(new JLabel("Ano"));
container.add(ano);

...

int day = Integer.parseInt(dia.getText());
int month = Integer.parseInt(mes.getText());
int year = Integer.parseInt(ano.getText());

DateTime hoje = new DateTime();
DateTime dataVencimento = new DateTime(year, month, day, 0, 0);

Days diferenca = Days.daysBetween(dataVencimento, hoje);

What I did was create a variable for each part of the date, day, month, year, and convert it to an integer and put the variable within the DateTime dateVenu.