When attempting to convert a given date into a specific format, Java developers may encounter the exception: "java.lang.IllegalArgumentException: Cannot format given Object as a Date." This error occurs when trying to format an unsupported object as a date.
To resolve this issue, we need to use the correct formatting strategy. The DateFormat.format method accepts Date objects as input. In the provided example, the input value is a string representing a date, not a Date object.
The solution is to use two separate SimpleDateFormat objects: one for parsing the input string and another for formatting the result. For instance:
<code class="java">// Define the output format (mm/yyyy for months and years) DateFormat outputFormat = new SimpleDateFormat("mm/yyyy", Locale.US); // Define the input format (yyyy-MM-dd'T'HH:mm:ss.SSSX) DateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSX", Locale.US); String inputText = "2012-11-17T00:00:00.000-05:00"; try { // Parse the input string as a Date object Date date = inputFormat.parse(inputText); // Format the Date object using the desired format String outputText = outputFormat.format(date); } catch (ParseException e) { // Handle parsing exceptions here }</code>
By following this approach, we can effectively convert a string representing a date into a desired format while avoiding the "Cannot format given Object as a Date" error.
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