无法解析的日期例外-月日期格式

Question

I have this format(String) of date: 4 AM CST 9 DEC 16

I want to parse it using this code:

String sDate = "4 AM CST  9 DEC 16";
Date st = new SimpleDateFormat("h aaa z d MMM yy",Locale.ENGLISH).parse(sDate);
DateFormat formatter = DateFormat.getDateTimeInstance(
                            DateFormat.LONG, 
                            DateFormat.FULL, 
                            new Locale("no"));
                    sDate = formatter.format(st);

But i'm having this exception instead:

java.text.ParseException: Unparseable date: "4 AM CST 9 DEC 16"

I'm really not sure but was it because the month in my sDate, the characters are all in uppercase value and the dateformat "MMM" the only uppercase letter is the first letter of each month?

Answer 1

This code:

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class Main {
  public static void main(String[] args) throws ParseException {
    String sDate = "4 AM CST  9 DEC 16";
    Date st = new SimpleDateFormat("h aaa z d MMM yy", Locale.ENGLISH).parse(sDate);
    DateFormat formatter = DateFormat.getDateTimeInstance(
        DateFormat.LONG,
        DateFormat.FULL,
        new Locale("no"));
    sDate = formatter.format(st);
    System.out.print(sDate);
  }
}

works fine. I have java version "1.8.0_77"

Answer 2

One of the reason of this exception may be of your regional setup in the computer. Unless you don't define Locale, in the DateFormat.getDateTimeInstance() method, it will take Locale info from your computer default regional location and format.

I have experienced such exception while modifying existing project when my colleague didn't get such exception in the same project and exactly same development environment. Then I crossed checked with his regional setting in control panel. The project was in Japanese Locale and date format but by computer date format was English (UK). After changing the format code didn't give error further.

Go to control panel -> Clock, Language and Region -> Region