This question already has answers here:
java date problem in parsing
(4 answers)
Closed 7 years ago.
I am setting the date in gui using JDateChooser , but it is not taking the proper value . I have used the format
DateFormat formatter = new SimpleDateFormat("yyyy-mm-dd");
I am choosing the date from the calender provided by JDateChooser, but the month value that it is taking finally is out of bounds!!! I have no clue. There is no problem in the calender they have provided. But the value they take after processing is clearly out of bounds.
The jar used by me is : jcalender-1.4.jar
mm is minutes. You want MM. It's in the documentation.
Need to change yyyy.MM.ddon this format . may be it works
Related
This question already has answers here:
How to check if string matches date pattern using time API?
(3 answers)
Parse any date in Java
(6 answers)
Format date in yyyy-MM-dd hh:mm:ss format from whatever format
(2 answers)
How to get the given date string format(pattern) in java?
(10 answers)
Closed 1 year ago.
I have several date data in the database with different format like this:
When
---
2021-11-20
2021-11-20 05:03:31
2021-11-20 04:19:25.4
19-11-2021 19:11
19/11/2021 17.39
19 November'21 16:00
19-November-2021
19/11/2021
19-Nov-2021
Now I would like to change them in one go regardless of the formatting it was to dd-mm-yyyy so they can be uniformed in Java. I have found some answers in stack overflow before such as the usage of SimpleDateTime and DateTimeFormatter, but the datetime format were seemed as only one and they wanted to change to one specific datetime form, but in my case, the datetime form seems very random. Any idea would greatly be appreciated. Thanks in advance.
P.S. I would like to sanitize the upcoming inputs from users since it has the input field for "when", but the filling format is still up to user to pick which they like. This is sure not a good practice, but changing this fundamental and most likely used would cause such unnecessary conflict.
I would suggest to create a cutom formatter using pattern and use it. Something like:
public static final MY_DATE_TIME_PARSER = new DateTimeFormatterBuilder()
.appendPattern("yyyy-MM-dd[['T']HH[[':']mm[[':'][ss['.'[SSS][SS][S]]]['Z']]]]").parseDefaulting(ChronoField.HOUR_OF_DAY, 0)
.parseDefaulting(ChronoField.MINUTE_OF_HOUR, 0).parseDefaulting(ChronoField.SECOND_OF_MINUTE, 0)
.parseDefaulting(ChronoField.NANO_OF_SECOND, 0).toFormatter();
And then use it as:
String string = "2021-01-01T10:20:30.Z";
LocalDateTime localDateTime = LocalDateTime.parse(string, MY_DATE_TIME_PARSER);
Try testing it with different inputs and see if it solves your purpose.
This question already has answers here:
How to get current moment in ISO 8601 format with date, hour, and minute?
(23 answers)
Calendar date to yyyy-MM-dd format in java
(11 answers)
Closed 6 years ago.
I am new to Java and trying to use Calendar object to get date and time of now as a string. I am particularly stuck at object and object conversions.
Here is the format I need (as a string):
2016-03-30T14:21:00Z
If I could just get the date and time format right, I could play around with the string but I am struggling with deprecated methods.
Thank you for replies
Your best bet is to start using Java 8's new Time API (or JodaTime if you can't use Java 8)
LocalDateTime now = LocalDateTime.now();
String isoFormat = DateTimeFormatter.ISO_INSTANT.format(now.toInstant(ZoneOffset.UTC));
System.out.println(isoFormat);
outputs 2016-03-30T17:51:38.639Z (when I tested it)
Solved my question using this link:
http://beginnersbook.com/2013/05/current-date-time-in-java/
Thanks for replies, I will also look into Java 8' time API
This question already has answers here:
How to subtract X days from a date using Java calendar?
(11 answers)
How to add 7 days to current date while not going over available days of a month?
(8 answers)
Closed 8 years ago.
First off thank you for taking the time to scroll through this.
I am basically a greenhorn when it comes to Java but I am working on a program that asks the user some basic info then sets a start date and then schedules service dates at bi weekly intervals between March and October from their start date.
For the start date variable, I simply set it up as:
STARTDATE = getDate();
to give the current date when the user signs up.
I have been sifting through my searches for days but I cannot figure out how to increment the service dates by 14 days to save my life.
I tried using SERVICEDATE = STARTDATE + (0, 14, 0);
but I cant make sense of whats really happening here. Any ideas?
Use the common-lang library. It has a DateUtils class which can be used for this.
Use it like this:
SERVICEDATE = DateUtils.addDays(STARTDATE, 14);
Maybe have a look at this: Java getDate date-x days
They are subtracting days but I think it can be turned into adding days too.
I suggest you use Joda Library
Date STARTDATE = getDate();
DateTime stDate = new DateTime(STARTDATE);
//Date after 14 days
DateTime rsDate = stDate.plusDays(14);
This question already has answers here:
How to get the current date/time in Java [duplicate]
(28 answers)
Closed 9 years ago.
How to get current java date? I need to use it in my app for setting posting time. I tried use DateSelecter libdary but that didnt work in the way I needed I to, it printed it in a non human readable way.
You're missing the java tsg. But this is how to get thr date:
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date));
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Android: how to get the current day of the week (Monday, etc…) in user language?
I want to get the date of the specific day in java for android application development.
eg. For Sunday
7.8.2011
14.8.2011
21.8.2011
Date date1 = (new GregorianCalendar(2011 , Calendar.AUGUST, 28)).getTime();
Format formatter = new SimpleDateFormat("EEEE");
String s = formatter.format(date1); // s==Sunday
Take a look at the Calendar Class. You can instantiate it using the Calendar.getInstance() method.
http://download.oracle.com/javase/1.5.0/docs/api/java/util/Calendar.html
i think its something like this cal.get(Calendar.DAY_OF_WEEK)