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HomeJavajavaTutorialWhy is Java SimpleDateFormat Consistently Interpreting the Month as January with AD Dates?

Why is Java SimpleDateFormat Consistently Interpreting the Month as January with AD Dates?

Java SimpleDateFormat Consistently Mistaking Month as January

As developers work with date values from various sources, they may encounter instances where the Java SimpleDateFormat class incorrectly interprets the month portion of the date. This issue can manifest when transforming dates from Active Directory (AD) to Java dates.

The provided code snippet utilizes SimpleDateFormat to parse AD date values into Java Date objects:

<code class="java">SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/DD");</code>

However, the provided date format pattern ("yyyy/MM/DD") assumes a capital "M" for the month designation. This conflicts with the lowercase "M" used in AD date values, resulting in the incorrect interpretation of the month as January for every parsed date.

Addressing the Issue

To resolve this discrepancy, the code needs to employ the correct format pattern for AD dates, which utilize a lowercase "m" for month designation. Additionally, the date separator should align with AD standards. Therefore, the revised format pattern should be:

<code class="java">SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");</code>

With this adjustment, the SimpleDateFormat will correctly parse AD date values, resolving the issue of consistently mistaking the month as January and ensuring accurate date transformations.

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