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ISODateTimeFormat.dateTime().parseDateTime() cannot parse 2015-11-18T00:00:00+0000

I have string in this format "2015-11-18T00:00:00+0000". I thought it's a ISO8601 format and tried to parse it to a Joda DateTime instance, but it told me it's malformed:
String toParse = "2015-11-18T00:00:00+0000";
DateTime date = ISODateTimeFormat.dateTime().parseDateTime(toParse);
And I got this error:
java.lang.IllegalArgumentException: Invalid format: "2015-11-18T00:00:00+0000" is malformed at "+0000"
How can I convert the above string to a DateTime?

The method ISODateTimeFormat.dateTime() requires a millisecond part which is missing in your input. Solution: Use the method dateTimeNoMillis().
String input = "2015-11-18T00:00:00+0000";
DateTime dt = ISODateTimeFormat.dateTimeNoMillis().parseDateTime(input);
System.out.println(dt); // 2015-11-18T01:00:00.000+01:00 (using offset of default timezone)
If you want to preserve the offset (+0000) contained in your input then you will also need to call withOffsetParsed() on your formatter.

Convert String to Date. can Date.parse be used?

I am trying to read a line from a file, however, I keep getting an error saying:
Incompatible types: String cannot be converted to Date.
How can I fix this?
String[] attributes = csvString.split(",");
teamName = attributes[0];
result = attributes[1];
date = (attributes[2]);
opponent = attributes[3];
attendance = Integer.parseInt(attributes[4]);
I also tried date = Date.parse(attributes[2]);, which did not work.
The file looks as follows:
Kronos United,2-3,16/05/2011,Dedfield United,2829

Since you are representing a date, not a specific instant in time, you should represent the match's date as a LocalDate instance, rather than an obsolete and poorly-name Date instance.
DateTimeFormatter df = DateTimeFormatter.ofPattern("dd/MM/yyyy");
LocalDate date = LocalDate.parse(text, df);
If you can, stick with LocalDate throughout your program, and avoid the deprecated Date class. If you need to interoperate with some other library that requires a Date, you can convert it, but you have choose the target time zone and time of day, which isn't included in the data you are parsing.

You can use SimpleDateFormat.
In your example, that should do the trick:
String dateString = "16/05/2011";
DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
Date date = df.parse(dateString);
don't forget to
import java.text.SimpleDateFormat;
import java.text.DateFormat;

What is the datatype of your attribute date. Is it date or string? It must be string to read first from csv and then convert to date.
String date = attributes[2];
And then later convert it to date using SimpleDateFormat class.

Java util.numberFormatException for input string: "2014-01-12 05-44-56"

I'm new in OFBiz, and Java. I used bellow block of code for checking date time input and use that for searching in table.
Timestamp strtDate = UtilDateTime.getTimestamp((String)request.getParameter("strt_date"));
if(strtDate != null)
{
// then here i used the date for taking data.
}
When i fill the date time field of form to search or when no date is selected for searching error occure that show numberFormatException, so how i can solve that? thanks for any help and guide.

Based on the Apache ofbiz API it looks like UtilDateTime#getTimestamp(String) expects milliseconds value. You are passing in "2014-01-12 05-44-56". You need to parse your date first. With pure pre 1.8 java (keep in mind that formatters aren't thread safe):
String dateString = "2014-01-12 05-44-56";
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
Date date = formatter.parse(dateString);
UtilDateTime.getTimestamp(date.getTime());
Since java 1.8 (highly recommended to switch if you can!):
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH-mm-ss");
ZonedDateTime date = ZonedDateTime.parse(text, formatter);
long millis = date.toInstant().toEpochMilli();

you have to pass time in milliseconds not as you are passing.
you can check code also :
public static Timestamp getTimestamp(String milliSecs) throws NumberFormatException {
return new Timestamp(Long.parseLong(milliSecs));
}
it will parse the data in long which you are passing and that should be valid long value.

request.getParameter("strt_date") will anyways return String, so no need to cast it explicitly to String. Moreover, there will be a contract between Client & Server on the required Date Format. So you have to parse the String-Date in the same format using SimpleDateFormat. Code outlook will look like bellow:
SimpleDateFormat formatter = new SimpleDateFormat("contract-date-format");
Date date = formatter.parse(request.getParameter("strt_date"));
UtilDateTime.getTimestamp(date.getTime());

How to retrieve chosen date from JDatechooser?

I am using Eclipse to do a college project on Java. I realized that java does not have a built in date selector like C#, so I downloaded and added JDateChooser. I tried to retrieve the chosen date but it failed:
String Date = dateChooser.getDate(); //I want to the date to be retrieved as string
Any ideas? Is there some kind of initialization that I must do?

Retrieve the date that the user selected by calling getDate(), which returns a Date object. Then convert that object into a String by calling SimpleDateFormat.format():
Date d;
SimpleDateFormat sdf;
String s;
d = dateChooser.getDate(); // Date selected by user
sdf = SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); // Or whatever format you need
s = sdf.format(d); // Viola
See also: Question 5683728

If I have the right component, the Java Docs show that the getDate method returns Date
getDate
public java.util.Date getDate() Returns the date. If the
JDateChooser is started with a null date and no date was set by the
user, null is returned. Returns: the current date

String dob =new SimpleDateFormat("dd-MMM-yyyy").format(jDateChooser1.getDate());

Convert string into a Java Date

String stringDate = "2013-08-20T12:10:35Z"
How can I convert this stringDate into a Date? I have tried the following:
def dateString = stringDate.replace("T",":")
Date date = new Date().parse("yyyy-M-d:H:m:s", dateString)
The result is not correctly formatted and the parse is deprecated for date.

The Java method static long parse(String s) is deprecated, but groovy provides a non-deprecated parse method:
def date = Date.parse("yyyy-MM-dd'T'HH:mm:ss'Z'", stringDate)
The format you're using is the ISO 8601 standard format. Searching on that should provide you with additional information.

You need to set up a Java SimpleDateFormat object and then call its parse method.
SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss") ;
Date result= sdf.parse(input) ;
Check SimpleDateFormat documentation for format options.

Make your life easier, use the Grails Joda Time plugin.
http://grails.org/plugin/joda-time