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How to get current time stamp in android?

I want to get current Timestamp in this YYYY-MM-DDTHHmmssZ .For instance; Expected value : 2016-01-01%2000:00:00. I have tried various methods,One of them is below :
String timeStamp = new SimpleDateFormat("YYYY-MM-DD'T'HH:mm:ss'Z'").format(new Timestamp(System.currentTimeMillis()));
Still I am facing the error (didn't getting expected output which is 2016-01-01%2000:00:00) , Any help will be appreciate,thanks.

just use this:
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd-MM-yyyy-hh-mm-ss");
String format = simpleDateFormat.format(new Date());
Log.d("MainActivity", "Current Timestamp: " + format);
just change the format in which you want current time stamp.
Thanks. :)

Your question is ambiguous but according to my understanding:
String timeStamp = new SimpleDateFormat("YYYY-MM-DD'T'HH:mm:ss'Z'")
You haven to set the timezone, like:
private static SimpleDateFormat df
= new SimpleDateFormat( "yyyy-MM-dd'T'hh:mm:ssz")
df.setTimeZone(TimeZone.getTimeZone("GMT"));
OR
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
System.out.println(sdf.format(new Date())); //-prints-> 2015-01-22T03:23:26Z
If you want to learn more. please refer to:
https://svn.apache.org/repos/asf/commons/dormant/feedparser/trunk/src/java/org/apache/commons/feedparser/tools/ISO8601DateParser.java

Storing Current date in database

I am having a column in my table of type TIMESTAMP.
In my servlet am writing the code to insert current date and time in this column like this :
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = new Date();
String sendDate = dateFormat.format(date);
ps.setString(4,sendDate);
But it throws an Exception that:
java.sql.SQLException: [Oracle][ODBC][Ora]ORA-01843: not a valid month
What can be the reason?
Please help.

Why do you use ps.setString ?
You should use ps.setDate.
EDIT
Date dateNow = new java.sql.Date(System.CurrentTimeMillis())
ps.setDate(dateNow);
Better to use timestamp tough:
ps.setTimestamp(1, new Timestamp(System.currentTimeMillis());

Cast String Date to new format Java

I am trying to cast a date format which is string resultset from database to a standard format, but using simpledateformat gives following error:
Exception in thread "main" java.lang.IllegalArgumentException: Cannot format given Object as a Date
at java.text.DateFormat.format(Unknown Source)
at java.text.Format.format(Unknown Source)
at CopyEJ.CopyEJ.main(CopyEJ.java:113)
RROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [../../../src/share/back/util.c:838]
With De-bug I found out variable time_stmp has value "2013-04-19 17:29:06" I want to cast to this:
yyyyMMddhhmmss
Here's code:
SimpleDateFormat df = new SimpleDateFormat("yyyyMMddhhmmss");
ResultSet rs_dt = cmd1.executeQuery(dt);
String time_stmp = null;
while (rs_dt.next())
{
time_stmp = rs_dt.getString(1);
}
StringBuilder ts = new StringBuilder( df.format( time_stmp ) );
What is the best way to achieve this?

Your Simple DateFormat has the wrong datepattern. You have to parse it to date with the pattern of you DB, then parse it back to String.
Try it this way:
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
ResultSet rs_dt = cmd1.executeQuery(dt);
String time_stmp = null;
while (rs_dt.next())
{
time_stmp = rs_dt.getString(1);
}
Date d = null;
try {
Date d = df.parse(time_stmp);
} catch (ParseException ex) {
Logger.getLogger(Prime.class.getName()).log(Level.SEVERE, null, ex);
}
SimpleDateFormat df2 = new SimpleDateFormat("yyyyMMddhhmmss");
StringBuilder ts = new StringBuilder( df2.format(d) );
By the way:
If you want your output to be in 24h-Format, then you have to use the pattern yyyyMMddHHmmss

The problem is, format of the date retrieved from DB is yyyy-dd-MM HH:mm:ss and you are trying to parse it with the format yyyyMMddhhmmss
You can do something like this
String date = "2013-04-19 17:29:06";
Date d = new SimpleDateFormat("yyyy-dd-MM HH:mm:ss").parse(date);
SimpleDateFormat outputFormat = new SimpleDateFormat("yyyyMMddhhmmss");
System.out.println(outputFormat.format(d));

You need to use DateFormat.parse() here since the argument is of type String. DateFormat.format() on the other hand is used to format Date objects as String.
StringBuilder ts = new StringBuilder(df.format(df.parse(time_stmp)));
Also, it's recommended to save date/time data as a TimeStamp in database instead of a String.

Like it was mention you need to use
SimpleDateFormat.parse()
Also if your string is in the form
`2013-04-19 17:29:06`
You will want to construct your SimpleDateFormat for reading in like this
`yyyy-MM-dd HH:mm:ss` //make sure you use uppercase H for 24 hour times

Use SimpleDateFormat.parse() to convert a String to a Date.
Use SimpleDateFormat.format() to convert a Date to a String.
All together now:
SimpleDateFormat dbFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat stdFormat = new SimpleDateFormat("yyyyMMddhhmmss");
String s = stdFormat.format(dbFormat.parse(input));
You can modify the formats to suit your needs.

Hi you can use below code to format date as of your choice (Ex: yyyy-MM-dd HH:mm:ss)
Calendar calendar = Calendar.getInstance();
Date calDate = calendar.getInstance().getTime();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("Calendar Date: " + calDate);
System.out.println("Your Choice Date format (yyyy-MM-dd HH:mm:ss): "+dateFormat.format(calDate));

This will work
SimpleDateFormat df = new SimpleDateFormat("YYYY-MM-dd hhhh:mm:ss");
String time_stmp ="2013-04-19 17:29:06";
Date date=df.parse(time_stmp);
StringBuilder ts = new StringBuilder( df.format( date ) );
System.out.println(ts);

Convert date into specific format

I am working on Java. I have a date for example: 20120328.
Year is 2012, month is 03 & day is 28.
I want to convert it into yyyy-MM-dd format.
I have tried it but it is not working.
How to do it?

SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
Date date = new Date();
String ourformat = formatter.format(date.getTime());
If you want other than "MM/dd/yyyy" then just change the format in SimpleDateFormat

Find some examples here.
DateFormat formatter = new SimpleDateFormat("MM/dd/yy");
Date date = (Date)formatter.parse("01/29/02");

Take a look here. You will need to use the SimpleDateFormat class.

First you create the format using substring like
String myDate = "20120328";
String myConvertedDate = myDate.substring(0,4) + "-" + myDate.substring(5,6) + "-" + myDate.substring(7);
This produces the date as 2012-03-28
Then use simple date format to convert that into date if required.

You can use this one for Date formatting
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
Date date = new Date();
String ourformat = formatter.format(date.getTime());
And this one for getting TimeStamp
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
Timestamp timestamp =timestamp=new Timestamp(System.currentTimeMillis());
String ourformat = formatter.format(timestamp);

Simple java date conversion

Having some troubles and can't find a quick answer..
Im trying to store a date within a string, and later fetch it to convert it back to a date.
However when storing the date using:
string tmp = new Date().toString();
And then trying to convert it back using
Date date = new Date(tmp);
I get the Exception type
java.lang.IllegalArgumentException
with my Android 2.2 device. Does work with 2.2 & 2.3 emus tho.
Any tips on what other way i can store and convert back?

You could use SimpleDateFormat with its methods parse() and format().
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss.SSS");
String tmp = sdf.format(new Date());
Date date = sdf.parse(tmp);

Do you need it to be a string? long is easier :)
do
long time = new Date().getTime();
Date date = new Date(time);
then you dont' have to parse

SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
// to string
String dateStr = formatter.format(new Date());
// to date
Date date = formatter.parse(dateStr);

use SimpleDateFormat as shown below.
SimpleDateFormat formatter= new SimpleDateFormat("yyyy-MM-dd");
//this will convert date into string.
String temp = formatter.format(currentDate.getTime());
//this will convert string into date format.
Date date=(Date)formatter.parse(temp);