How to Convert `java.util.Date` to `java.time.LocalDate`?

Converting java.util.Date to java.time.LocalDate

Java's date and time API was overhauled in JDK 8/JSR-310, introducing a new paradigm for handling date-related operations. A common task in this transition is converting existing java.util.Date objects to the new java.time.LocalDate format.

Short Answer

To convert a java.util.Date to LocalDate, follow these steps:

Date input = new Date();
LocalDate date = input.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();

Explanation

java.util.Date represents an instant in time without any time zone information. However, LocalDate represents a specific calendar date without time or time zone.

To convert a Date to LocalDate, you must first convert Date to Instant using the toInstant() method. An Instant has no time zone associated with it.

Next, you need to apply a time zone to the Instant to get a ZonedDateTime object. You can use ZoneId.systemDefault() to get the default system time zone.

Finally, you can extract the LocalDate component from the ZonedDateTime object using the toLocalDate() method.

Java 9 Answer

Java SE 9 introduced a simpler alternative to the above conversion:

Date input = new Date();
LocalDate date = LocalDate.ofInstant(input.toInstant(), ZoneId.systemDefault());

This method directly converts the Date to a LocalDate without the need for an intermediate ZonedDateTime object.

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