1.
http://javaalmanac.com/egs/javax.swing.text/formtext_FormTextNum.html
2.
DateFormat format = new SimpleDateFormat("yyyy-mm-dd");
JFormattedTextField dateField = new JFormattedTextField(df);
http://javaalmanac.com/egs/javax.swing.text/formtext_FormTextNum.html
2.
DateFormat format = new SimpleDateFormat("yyyy-mm-dd");
JFormattedTextField dateField = new JFormattedTextField(df);
JFormattedTextField numberField = new JFormattedTextField(format);