We Keep Coding

How to convert dd/MM/yyyy format date to ccyy/MM/dd format in java? [duplicate]

This question already has answers here:
How do I convert the date from one format to another date object in another format without using any deprecated classes?
(10 answers)
Closed 4 years ago.
I am facing an issue while converting dd/MM/yyyy format date to ccyy/MM/dd using Java. Can someone, please help me on this? It would be great If I get some example.
Here is my code## Example##
SimpleDateFormat dateFormat1 = new SimpleDateFormat("ddMMyyyy");
Date date1 = new Date();
LocalDate date = DateTimeFormat.forPattern("ddMMyyyy").parseLocalDate(dateFormat1.format(date1));
System.out.println("Century=" + date.getCenturyOfEra());
String usFormat = DateTimeFormat.forPattern("ccyy/MM/dd").print(date);
System.out.println(usFormat);
Thanks in advance.

Actually CCYYMMdd format is same as yyyyMMdd format since CC (century) is year (integer divide by 100) according to ISO 8601 you can read more in this post
converting dd/MM/yyyy date to ccyy/MM/dd date is simple
you can try this approach:
// define date source format
SimpleDateFormat sourceformat = new SimpleDateFormat("dd/MM/yyyy");
// define date target format that you want to convert to it
SimpleDateFormat targetformat = new SimpleDateFormat("yyyy/MM/dd");
// parse the input date as string with source format
// and then format it to the required target format
String dateAsString = "02/08/2018";
Date date = sourceformat.parse(dateAsString);
System.out.println(targetformat.format(date));
Output:
2018/08/02

Here is the solution for this
Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
String currentDate = dateFormat.format(date);
System.out.println("currentData::"+currentDate);
DateTime dt = new DateTime(dateFormat.parse(currentDate));
System.out.println("DT::"+dt);
DateTimeFormatter fmt = DateTimeFormat.forPattern("CCYY/MM/DD");
String str = fmt.print(dt);
System.out.println("CC Date::"+str);

Is there any way of converting time from "hh:mm:ss" format to "hh:mm AM/PM" format? [duplicate]

This question already has answers here:
Conversion from 12 hours time to 24 hours time in java
(17 answers)
Closed 6 years ago.
I am storing time in the database in this format: "hh:mm:ss" (example- 09:30:00) and then retrieving and trying to show it to users in this format: "hh:mm AM/PM" (example- 09:30 AM).
I'm using below code for converting it:
DateFormat currentTime = new SimpleDateFormat("hh:mm a");
String startTimeInSF = currentTime.format(startTime);
String endTimeInSF = currentTime.format(endTime);
where startTime and endTime is in hh:mm:ss format, but the above code is producing this error: java.lang.IllegalArgumentException: Bad class: class java.lang.String.
Please let me know how can I successfully convert the time from hh:mm:ss to hh:mm AM/PM?

I think you should parse your "hh:mm:ss" time into a Date Object, then use formatter to format it to "hh:mm a".
Like this :
DateFormat format1 = new SimpleDateFormat("hh:mm:ss");
try {
Date date = format1.parse("01:11:22");
SimpleDateFormat format2 = new SimpleDateFormat("hh:mm a");
String result = format2.format(date);
return result;
} catch (ParseException e) {
e.printStackTrace();
}

I believe you're looking for the parse(String source) method. The format() methods take in a Date object and output a String representation of the object. the parse methods take in a String object and converts it to a Date object.
To do what you want, you'll need to have a DateFormat with hh:mm:ss, convert the database String to a Date using parse, and then use your existing DateFormat and use format on the Date object to get the output String to display to your user.
http://docs.oracle.com/javase/7/docs/api/java/text/DateFormat.html

You need to change your code something like this, format function will not work directly on String object that is root cause of your exception.
DateFormat inputFormatter1 = new SimpleDateFormat"HH:mm:ss");
Date date1 = inputFormatter1.parse("22:10:11");
DateFormat outputFormatter1 = new SimpleDateFormat("hh:mm a");
String output1 = outputFormatter1.format(date1); //
Out will be 10:10 pm

Create a function that takes string object and returns Date object in dd-MM-yyyy format [duplicate]

This question already has answers here:
display Java.util.Date in a specific format
(11 answers)
Closed 6 years ago.
I have date in string object. I want to convert into Date object.
Date getDateFmString(String dateString)
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date convertedCurrentDate = sdf.parse(dateString);
return convertedCurrentDate ;
}
above function returning following output.
Fri Apr 22 00:00:00 IST 2016
but I want output in this format '2016-03-01' only
function should take string only.
function should return Date object.

I have done lot of research over web, but I got solution from one Expert.
Date getDateFrmString(String dDate)
{
java.sql.Date dDate = new java.sql.Date(new SimpleDateFormat("yyyy-MM-dd").parse(sDate).getTime());
return dDate;
}
this is what I want.

Change the date format from
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
to
SimpleDateFormat sdf = new SimpleDateFormat("dd-mm-yyyy");
Hope this works

See this example
public Class DateFormatDemo{
public static void main (String args[]) {
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy);
String dateInString = "01/01/2015";
try{
Date date = formatter.parse(dateInString);
System.out.println(date);
System.out.println(formatter.format(date));
}catch(ParseException e){
e.printStackTrace();
}
}
}
This link might help you with string to date object conversions

You are parsing with the wrong format try
String dateString="01-01-2016";
SimpleDateFormat sdfP = new SimpleDateFormat("dd-MM-yyyy");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date convertedCurrentDate = sdfP .parse(dateString);
String date=sdf.format(convertedCurrentDate );
System.out.println(date);
Output:
2016-01-01
DEMO1
And if you want the format to dd-MM-yyyy then no need to define seperate SimpleDateFormat object.
String dateString="01-01-2016";
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date convertedCurrentDate = sdf.parse(dateString);
String date=sdf.format(convertedCurrentDate );
System.out.println(date);
OUTPUT:
01-01-2016
DEMO2
To format the string date you have to first parse the String to Date object using the same format of date which the String have then format it using the desired format as seen in the above code.

Date objects don't have a format. Only a String does. A Date object will be output with whatever format you tell it to be format as. It all depends on what the format of the DateFormat object is when you call .format(). Calling the toString() method on a Date object uses a DateFormat of "dow mon dd hh:mm:ss zzz yyyy".

Let's do it step by step:
You have a date as String in dd-MM-yyyy format.
You want to convert it into date. (for this you are using SimpleDateFormat)
Now you are printing the date. Question here is are you printing the converted date object or input string?
If its a date object then toString method is called of date class.
As per comment on java.util.Date class it's:
dow mon dd hh:mm:ss zzz yyyy
similar to
Fri Apr 22 00:00:00 IST 2016
So that coincides with what you get in output in the second approach. But how is that code even running is strange.
String inputStr = "11-11-2012";
DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
Date inputDate = dateFormat.parse(input);
Variable 'input' is not defined.
What are the possible solutions:
While printing date, convert it back to String using SimpleDateFormat as per the requirement.
Date d =new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String dStr = sdf.format(dateString);
System.out.printn(dStr);
Extending class java.util.Date and override toString, but that would be a bad idea.

Java how to make date from string [duplicate]

This question already has answers here:
Java string to date conversion
(17 answers)
Closed 8 years ago.
how can i make Date data type from String in java?
input: String "2014/01/01 18:02:02" => output: Date 2014/01/01 18:02:02

You could use a DateFormat to parse and format (they're reciprocal functions) the String. Something like,
String str = "2014/01/01 18:02:02";
DateFormat df = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
try {
Date d = df.parse(str);
System.out.println(df.format(d));
} catch (ParseException e) {
e.printStackTrace();
}
Output is (as requested)
2014/01/01 18:02:02

please use SimpleDateFormat to parse String To Date.
In there you can find suitable DateFormat to convert this String to Date.

you can try this
String dateString = "2014/01/01 18:02:02";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
LocalDateTime StringAsDate = LocalDateTime.parse(dateString, formatter);
I would recommend using Time(java.time) API instead of java.util for your Date & Time needs as it is new and exclusively added to java for Date & Time operations.

You can use the following code snippet -
String dateString = "10-11-2014";
DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
Date inputDate = dateFormat.parse(dateString);

You can try this too.
SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
String dateInString = "2014/01/01 18:02:02";
Date date = formatter.parse(dateInString);
System.out.println(date);
System.out.println(formatter.format(date));
It is a working and it is also suitable to you as it is not complicated. you will get this output:
Wed Jan 01 18:02:02 IST 2014
2014/01/01 18:02:02

For your date following code should work :-
String myString = "2014/01/01 18:02:02";
DateFormat myDateFormat = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
Date myDate = myDateFormat.parse(myString);
For more details, see the documentation for SimpleDateFormat. Just make sure you use capital "MM" for month and small "mm" for minute.

How to change the format of date in java [duplicate]

This question already has answers here:
How can I change the date format in Java? [duplicate]
(10 answers)
Closed 9 years ago.
I have a string and i need to convert it to date in the "YYYY-mm-dd" format which i'm unable to do. I checked the similar post on stckoverflow but didnt help so i'm posting this query.
String stringDate = "Dec 13, 2013";
I need this to be convert to
Date reportDate = 2013-12-13";
when i use simpledateformat i got unparsable date. Please help

Check this out:
try {
SimpleDateFormat format1 = new SimpleDateFormat("MMM dd, yyyy");
SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM-dd");
String stringDate = "Dec 13, 2013";
Date date = format1.parse(stringDate);
System.out.println(format2.format(date));
} catch (ParseException exp) {
// Take appropriate action
}
Output: 2013-12-13

In programming a very important skill is taking information that is close to what you need and using it to find what you do need.
Look at the link in the comments and you can see:
http://download.oracle.com/javase/1.5.0/docs/api/java/text/SimpleDateFormat.html
Read that and you have what you need to adjust the answer there to give the results you want.

Use SimpleDateFormat as here:
new_date is your Date
String stringDate = "Dec 13, 2013";
SimpleDateFormat format = new SimpleDateFormat("YYYY-MM-DD");
Date new_date=format.parse(stringDate);

String date="Your date";
SimpleDateFormat format = new SimpleDateFormat("MMM DD, YYYY");
Date d= format.parse(date);
DateFormat newFormat = new SimpleDateFormat("YYYY-MM-DD");
System.out.println(newFormat.format(d));

I would do something like:
SimpleDateFormat parser = new SimpleDateFormat("MMM dd, yyyy");
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
Date reportDate = parser.parse(stringDate)
String result = formatter.format(reportDate);