How to Parse Month Full Form String Using Dateformat in Java

How to parse month full form string using DateFormat in Java?

LocalDate from java.time

Use LocalDate from java.time, the modern Java date and time API, for a date

    DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("MMMM d, u", Locale.ENGLISH);
    LocalDate date = LocalDate.parse("June 27, 2007", dateFormatter);
    System.out.println(date);

Output:

2007-06-27

As others have said already, remember to specify an English-speaking locale when your string is in English. A LocalDate is a date without time of day, so a lot better suitable for the date from your string than the old Date class. Despite its name a Date does not represent a date but a point in time that falls on at least two different dates in different time zones of the world.

Only if you need an old-fashioned Date for an API that you cannot afford to upgrade to java.time just now, convert like this:

    Instant startOfDay = date.atStartOfDay(ZoneId.systemDefault()).toInstant();
    Date oldfashionedDate = Date.from(startOfDay);
    System.out.println(oldfashionedDate);

Output in my time zone:

Wed Jun 27 00:00:00 CEST 2007

Link

Oracle tutorial: Date Time explaining how to use java.time.

Java: Convert String Date to Month Name Year (MMM yyyy)

Your format must match your input

for 2016-03-20

the format should be (just use a second SimpleDateFormat object)

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

Full answer

SimpleDateFormat month_date = new SimpleDateFormat("MMM yyyy", Locale.ENGLISH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

String actualDate = "2016-03-20";

Date date = sdf.parse(actualDate);

String month_name = month_date.format(date);
System.out.println("Month :" + month_name);  //Mar 2016

Using java.time java-8

String actualDate = "2016-03-20";
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd", Locale.ENGLISH);
DateTimeFormatter dtf2 = DateTimeFormatter.ofPattern("MMM yyyy", Locale.ENGLISH);
DateTimeFormatter dtf3 = DateTimeFormatter.ofPattern("MMMM yyyy", Locale.ENGLISH);
LocalDate ld = LocalDate.parse(actualDate, dtf);
String month_name = dtf2.format(ld);
System.out.println(month_name); // Mar 2016
String fullMonthAndYear = dtf3.format(ld);
System.out.println(fullMonthAndYear); // March 2016

Java: How to convert string with month name to DateTime?

2018/Java 10

String value = "Sunday, September 29, 2013 7:59:58 AM PDT";
String format = "EEEE, MMMM dd, yyyy h:mm:ss a zzz";

DateTimeFormatter formatter = new DateTimeFormatterBuilder()
        .parseCaseInsensitive()
        .appendPattern(format)
        .toFormatter(Locale.US);
ZonedDateTime zdt = ZonedDateTime.parse(value, formatter);
System.out.println(zdt);
System.out.println(zdt.format(formatter));

Which prints

2013-09-29T07:59:58-07:00[America/Los_Angeles]
Sunday, September 29, 2013 7:59:58 AM PDT

Original answer

You need to change the expected format to meet the requirements as specified by the SimpleDateFormat

String value = "Sunday, September 29, 2013 7:59:58 AM PDT";
String format = "EEEE, MMMM dd, yyyy h:mm:ss a zzz";
SimpleDateFormat sdf = new SimpleDateFormat(format);
try {
    Date date = sdf.parse(value);
    System.out.println(date);
    System.out.println(sdf.format(date));
} catch (ParseException ex) {
    ex.printStackTrace();
}

Which outputs...

Mon Sep 30 00:59:58 EST 2013
Sunday, September 29, 2013 7:59:58 AM PDT

How to parse date with only month and year with SimpleDateFormat

You parsed it fine, but it's printed in PDT, your local timezone.

Sat Oct 31 17:00:00 PDT 2020

Well, Date doesn't track timezones. The Calendar class does, which is internal to the formatter. But still, default print behavior is current timezone.

If you logically convert this output back to UTC, and it will be November 1 since PDT is UTC-7.

Basically, use java.time classes. See additional information here How can I get the current date and time in UTC or GMT in Java?

How can I convert a String date with full month names to a Date object in java?

 String str = "6 December 2002";
 DateFormat formatter = new SimpleDateFormat("dd MMM yyyy");
 Date date = (Date)formatter.parse(str);

• Here is working IDE One demo

Must See

• API Doc

Java string to date conversion

That's the hard way, and those java.util.Date setter methods have been deprecated since Java 1.1 (1997). Moreover, the whole java.util.Date class was de-facto deprecated (discommended) since introduction of java.time API in Java 8 (2014).

Simply format the date using DateTimeFormatter with a pattern matching the input string (the tutorial is available here).

In your specific case of "January 2, 2010" as the input string:

1. "January" is the full text month, so use the MMMM pattern for it
2. "2" is the short day-of-month, so use the d pattern for it.
3. "2010" is the 4-digit year, so use the yyyy pattern for it.

String string = "January 2, 2010";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MMMM d, yyyy", Locale.ENGLISH);
LocalDate date = LocalDate.parse(string, formatter);
System.out.println(date); // 2010-01-02

Note: if your format pattern happens to contain the time part as well, then use LocalDateTime#parse(text, formatter) instead of LocalDate#parse(text, formatter). And, if your format pattern happens to contain the time zone as well, then use ZonedDateTime#parse(text, formatter) instead.

Here's an extract of relevance from the javadoc, listing all available format patterns:

DateTimeFormatter dtf =
    DateTimeFormat.forPattern("MMMM dd yyyy").withLocale(Locale.ENGLISH);
LocalDate d1 = dtf.parseLocalDate("june 15 2015");
LocalDate d2 = dtf.parseLocalDate("september 15 2015");
System.out.println(d1.isBefore(d2)); // true