Скачать или смотреть How to Parse and Format the Date in Java Using SimpleDateFormat

Learn how to parse and format dates in Java using the `SimpleDateFormat` class to convert strings into Date objects and vice versa.
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If you've ever worked with dates and times in Java, you may have encountered a scenario where you need to parse a date from a string or format a date into a string. One popular class for this task is the SimpleDateFormat class. Below, we will walk through how to parse the date "2015-01-13 15:59:10" using SimpleDateFormat.

Parsing a Date String

To parse a date string using SimpleDateFormat, you need to specify the format of the date in the constructor of SimpleDateFormat. For example:

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In the code above:

We define the date string "2015-01-13 15:59:10".

We create a SimpleDateFormat instance that matches the pattern of the date string.

We use the parse method to convert the string into a Date object.

We handle any potential ParseException that could arise if the format of the date string does not match the expected pattern.

Formatting a Date

Once you have a Date object, you might want to format it back into a string. Here’s how you can do it using SimpleDateFormat:

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In this example:

We create a Date object representing the current date and time.

We format this date object into a string with our desired pattern.

We print the formatted date string.

Summary

SimpleDateFormat is a versatile class in Java for parsing and formatting dates. By defining an appropriate date pattern, you can easily convert date strings into Date objects and vice versa. Although SimpleDateFormat is easy to use, it is important to handle potential parsing exceptions and ensure your date patterns are correctly specified.