How to Parse ISO-8601 DateTime with Offset and Colon in Java?

Parsing ISO-8601 DateTime with Offset and Colon in Java

Question:

Parsing date time in Java can be challenging when encountering unconventional formats. How can we parse a date time string in ISO-8601 format with an offset and a colon, such as "2013-04-03T17:04:39.9430000 03:00", and convert it to the desired format "dd.MM.yyyy HH:mm"?

Answer:

The specified format is indeed the ISO-8601 standard, which is commonly used in data exchange. To parse and reformat it in Java, we can utilize the SimpleDateFormat class:

<code class="java">import java.text.SimpleDateFormat;
import java.util.Date;

// Example date time string in ISO-8601 format
String isoDateTime = "2013-04-03T17:04:39.9430000+03:00";

// Create SimpleDateFormat objects for input and output formatting
SimpleDateFormat inFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
SimpleDateFormat outFormat = new SimpleDateFormat("dd.MM.yyyy HH:mm");

// Parse the ISO-8601 date time string into a Date object
Date dtIn = inFormat.parse(isoDateTime);

// Convert the Date object to the desired format
String dtOut = outFormat.format(dtIn);

// Output the converted date time in the desired format
System.out.println(dtOut);</code>

In this code:

• inFormat defines the ISO-8601 parsing format.
• outFormat defines the desired output format.
• dtIn stores the parsed Date object.
• dtOut contains the resulting date time string in the desired format.

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