Why Does SimpleDateFormat Generate an Incorrect Date for a \'YYYY-MM-dd HH:mm\' String?

SimpleDateFormat Generates Incorrect Date Time for YYYY-MM-dd HH:mm String

Issue:

Parsing a string in the "YYYY-MM-dd HH:mm" format using SimpleDateFormat yields an unexpected date.

Example:

<code class="java">Date newDate = null;
String dateTime = "2013-03-18 08:30";
SimpleDateFormat df = new SimpleDateFormat("YYYY-MM-dd HH:mm", Locale.ENGLISH);
df.setLenient(false);
try {
    newDate = df.parse(dateTime);
} catch (ParseException e) {
    throw new InvalidInputException("Invalid date input.");
}</code>

Actual Result:

Sun Dec 30 08:30:00 EST 2012

Expected Result:

2013-03-18 08:30:00

Resolution:

The issue lies in the SimpleDateFormat pattern string. The format specifier for year should be "yyyy" instead of "YYYY".

Corrected Code:

<code class="java">SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.ENGLISH);</code>

This modification ensures that the year is parsed as a four-digit year, aligning with the expected format of "YYYY-MM-dd HH:mm".

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