How to fix 'Date Time Parse Exception' in Java

Question

I have a Date Time Formatter Which I am trying to format inputted dates into format (d/MM/yyyy) Shown Below

DateTimeFormatter format = DateTimeFormatter.ofPattern("dd/MM/yyyy");

I am then using this formatter to take user input on date of birth as a String and then attempting to parse that through to store as a LocalDate variable with temp storing the user inputted date of birth

public void addCustomer() throws ParseException {
        customerID++;
        //Create Scanner
        Scanner scan = new Scanner(System.in);

        //Take user input
        System.out.println("Please enter your name: ");
        String name = scan.nextLine();
        System.out.println("Please enter your Date of Birth(dd/MM/yyyy): ");
        String temp = scan.nextLine();
        LocalDate date = LocalDate.parse(temp);
        Customer c = new Customer(customerID, name, date, false, "N/A");
        customers.add(c);
    }

However this always returns a DateTimeParseException: Text could not parse. Is the issue in how I am setting up the Date Time Formatter to always cause this exception? Shown Below

Exception in thread "main" java.time.format.DateTimeParseException: Text '27/01/1999' could not be parsed at index 0
    at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2046)
    at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1948)
    at java.base/java.time.LocalDate.parse(LocalDate.java:428)
    at java.base/java.time.LocalDate.parse(LocalDate.java:413)
    at BikeNow.addCustomer(BikeNow.java:153)
    at BikeNow.main(BikeNow.java:98)

So the content of temp will always be the date of birth of the user e.g 27/01/2000 — Chornologic, Apr 08 '19 at 13:06
This is working in my environment... Please show us the stack trace and the input that caused the `Exception`. — deHaar, Apr 08 '19 at 13:08
I am guessing there is some sort of `scan.nextInt()` or something before the lines that you have shown us. This is why we want a [mcve], rather than just a few lines of code. — RealSkeptic, Apr 08 '19 at 13:11
@RealSkeptic I have updated the question with the full method — Chornologic, Apr 08 '19 at 13:12
Your code doesn't actually use the `format` variable that you created. — RealSkeptic, Apr 08 '19 at 13:15
@RealSkeptic in the code before the question update, the defined `DateTimeFormatter` was used correctly. However, this is the reason (here/now), most likely. — deHaar, Apr 08 '19 at 13:18

score 4 · Accepted Answer · edited Apr 08 '19 at 18:50

4

Pass your DateTimeFormatter object.

Change this:

LocalDate date = LocalDate.parse(temp);

…to this:

LocalDate date = LocalDate.parse(temp, format);

edited Apr 08 '19 at 18:50

Basil Bourque

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answered Apr 08 '19 at 13:17

Rmahajan

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score 2 · Answer 2 · answered Apr 08 '19 at 13:17

I think that you forgot the parameter, here is the fix:

public void addCustomer() throws ParseException {
        customerID++;
        //Create Scanner
        Scanner scan = new Scanner(System.in);

        //Take user input
        System.out.println("Please enter your name: ");
        String name = scan.nextLine();
        System.out.println("Please enter your Date of Birth(dd/MM/yyyy): ");
        String temp = scan.nextLine();

    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        LocalDate date = LocalDate.parse(temp, formatter);
        Customer c = new Customer(customerID, name, date, false, "N/A");
        customers.add(c);
}

How to fix 'Date Time Parse Exception' in Java

2 Answers2