tl;dr
Until bug is fixed:
OffsetDateTime.parse(
"2018-02-13T10:20:12.120+0000" ,
DateTimeFormatter.ofPattern( "uuuu-MM-dd'T'HH:mm:ss.SSSX" )
)
When bug is fixed:
OffsetDateTime.parse( "2018-02-13T10:20:12.120+0000" )
Details
You are using the wrong classes.
Avoid the troublesome old legacy classes such as Date, Calendar, and SimpleDateFormat. Now supplanted by the java.time classes.
The ZonedDateTime class you used is good, it is part of java.time. But it is intended for a full time zone. Your input string has merely an offset-from-UTC. A full time zone, in contrast, is a collection of offsets in effect for a region at different points in time, past, present, and future. For example, with Daylight Saving Time (DST) in most of North America, the offsets change twice a year growing smaller in the Spring as we shift clocks forward an hour, and restoring to a longer value in the Autumn when we shift clocks back an hour.
OffsetDateTime
For only an offset rather than a time zone, use the OffsetDateTime class.
Your input string complies with the ISO 8601 standard. The java.time classes use the standard formats by default when parsing/generating strings. So no need to specify a formatting pattern.
OffsetDateTime odt = OffsetDateTime.parse( "2018-02-13T10:20:12.120+0000" );
Well, that should have worked. Unfortunately, there is a bug in Java 8 (at least up through Java 8 Update 121) where that class fails to parse an offset omitting the colon between hours and minutes. So the bug bites on +0000 but not +00:00. So until a fix arrives, you have a choice of two workarounds: (a) a hack, manipulating the input string, or (b) define an explicit formatting pattern.
The hack: Manipulate the input string to insert the colon.
String input = "2018-02-13T10:20:12.120+0000".replace( "+0000" , "+00:00" );
OffsetDateTime odt = OffsetDateTime.parse( input );
DateTimeFormatter
The more robust workaround is to define and pass a formatting pattern in a DateTimeFormatter object.
String input = "2018-02-13T10:20:12.120+0000" ;
DateTimeFormatter f = DateTimeFormatter.ofPattern( "uuuu-MM-dd'T'HH:mm:ss.SSSX" );
OffsetDateTime odt = OffsetDateTime.parse( input , f );
odt.toString(): 2018-02-13T10:20:12.120Z
By the way, here is a tip: I have found that with many protocols and libraries, your life is easier if your offsets always have the colon, always have both hours and minutes (even if minutes are zero), and always use a padding zero (-05:00 rather than -5).
DateTimeFormatterBuilder
For a more flexible formatter, created via DateTimeFormatterBuilder, see this excellent Answer on a duplicate Question.
Instant
If you want to work with values that are always in UTC (and you should), extract an Instant object.
Instant instant = odt.toInstant();
ZonedDateTime
If you want to view that moment through the lens of some region’s wall-clock time, apply a time zone.
ZoneId z = ZoneId.of( "America/Montreal" );
ZonedDateTime zdt = odt.atZoneSameInstant( z );
See this code run live at IdeOne.com.
All of this has been covered many times in many Answers for many Questions. Please search Stack Overflow thoroughly before posting. You would have discovered many dozens, if not hundreds, of examples.
About java.time
The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.
The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.
To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.
You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.
Where to obtain the java.time classes?
The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.
10can be either, trying usingHHinsteadhh... or add aam/pmmarker – Bolen