CODEWITHSUNDEEP
javadatedatetime
traveller
traveller

Reputation: 83

Java Date Parsing from string

I'm trying to parse a String into Data, I create the DataParser, in according to date format, the code I wrote is this: 

    String date_s = "04-May-2017 17:28:27";
    DateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss");
    Date date;
    try {
        date = formatter.parse(date_s);
         System.out.println(date);
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

When I execute this, I got always an exception

java.text.ParseException: Unparseable date: "04-May-2017 17:28:27"

I don't understand why the data is not parsed, someone can help me?

Upvotes: 1

Views: 427

Answers (3)

Norbert
Norbert

Reputation: 254

You need another constructor with a Locale that supports MMM (May)

DateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss",Locale.US)

or using standard format dd-MM-yyyy with month digits. (Sorry, in the meantime the answer was already posted)

Upvotes: 0

Anonymous
Anonymous

Reputation: 86389

This thread of answers would not be complete without the modern solution. These days you should no longer use Date and SimpleDateFormat, but switch over to the newer date and time classes:

    DateTimeFormatter formatter 
            = DateTimeFormatter.ofPattern("dd-MMM-yyyy HH:mm:ss", Locale.ENGLISH);
    LocalDateTime dateTime;
    try {
        dateTime = LocalDateTime.parse(date_s, formatter);
        System.out.println(dateTime);
    } catch (DateTimeParseException e) {
        System.err.println(e);
    }

This prints

2017-05-04T17:28:27

(LocalDateTime.toString() returns ISO 8601 format) If leaving out Locale.ENGLISH, on my computer I get

Text '04-May-2017 17:28:27' could not be parsed at index 3

Index 3 is where it say May, so the message is somewhat helpful.

LocalDateTime and DateTimeFormatter were introduced in Java 8, but have also been backported to Java 6 and 7.

Upvotes: 2

ΦXocę 웃 Пepeúpa ツ
ΦXocę 웃 Пepeúpa ツ

Reputation: 48307

the string you want to parse is local dependent (the word May is English), so the jvm is not able to infer that may is the month of may in English

define the formatter using the constructor qith the locale.

DateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss",Locale.ENGLISH);

Upvotes: 0

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