Can't Convert JavaFX Datepicker date to a specified date format - java-8

Question

Cannot convert javaFX Datepicker date to a specific(dd-MM-yyyy) date format.
here i using two Methods using SimpleDateFormat, but i got some errors like these.
when using this method
String testDateString = dpfrom.getValue().toString();
DateFormat df = new SimpleDateFormat("dd-MM-yyyy");
Date d1 = df.parse(testDateString);
System.out.println("Date in dd/MM/yyyy format is: "+df.format(d1));
the error message is:
java.text.ParseException: Unparseable date: "2019-09-23"
while using this method:
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date d1= sdf.parse(dpfrom.getValue().toString());
System.out.println(d1);
i got this Output:
Fri Mar 11 00:00:00 IST 29
but i want the output like this:
23-09-2019
please help me to solve this issue.
I hope you guys to solve this problem.Thank you...

Answer 1

Try this
private void dateTest() {
try {
String testDateString = "2019-09-23";
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date d1 = df.parse(testDateString);
System.out.println(d1);
df = new SimpleDateFormat("dd-MM-yyyy");
String d2 = df.format(d1);
System.out.println(d2);
} catch (ParseException e) {
e.printStackTrace();
}
}
output
Mon Sep 23 00:00:00 ICT 2019
23-09-2019
in your case change testDateString to dpfrom.getValue().toString();

Answer 2

As you have tagged your question as Java8 JavaFX8 question. Here is a more Java-8 fashion answer with LocalDate :
String static final DATE_PATTERN = "yyyy-MM-dd"
String datePickerValue = dpfrom.getValue().toString();
DateTimeFormatter dtf = DateTimeFormatter.ofPattern(DATE_PATTERN);
LocalDate date = LocalDate.parse(datePickerValue, dtf);
This is actually the new Java Time API since Java 8 (java.time) package

Answer 3

Trying to convert LocalDate to String and then try to parse it as a Date is a bad idea. Simply use DateTimeFormatter to convert to a string directly:
final String format = "dd-MM-yyyy";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
System.out.println("Date in " + format + " format is: " + formatter.format(d1));