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

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

The java.time package introduced in JDK 8/JSR-310 provides a more modern and comprehensive date and time API than the legacy java.util.Date class. Converting a java.util.Date object to the new java.time.LocalDate can be done effectively using the following steps:

1. Convert to Instant:

The java.util.Date class represents an instant in time as milliseconds since the epoch. To convert a java.util.Date object to an instant, use the toInstant() method.

Date input = new Date();
Instant instant = input.toInstant();

2. Apply Time Zone:

An instant does not contain timezone information. To convert it to a local date, we need to apply a timezone. Use the atZone() method with the desired timezone.

ZonedDateTime zdt = instant.atZone(ZoneId.systemDefault());

3. Extract LocalDate:

A ZonedDateTime contains both the date and time, as well as the timezone. To extract the LocalDate, use the toLocalDate() method.

LocalDate date = zdt.toLocalDate();

Java 9 Simplification:

Java 9 introduced a new method to simplify this conversion:

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

This method directly converts the instant to a LocalDate using the default timezone. It is more concise and efficient than the previous approach.

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