Different Ways to Convert java.util.Date to java.time.LocalDate in Java
Prior to Java 8 for handling time and dates we had Date, Calendar, TimeStamp (java.util) but there were several performance issues as well as some methods and classes were deprecated, so Java 8 introduced some new concepts Date and Time APIs’ (also known as Joda time APIs’) present in java.time package.
Java 7: Date, Calendar, TimeStamp present inside java.util package.
Java 8: Time Date APIs’ present inside the java.time package.
Different ways to Convert java.util.Date to java.time.LocalDate:
- Using Instance and ZonedDateTime
- Using Instant and Date.getTime()
- Using ofInstant() and ZoneId.systemDefault()
Method 1: Using Instance and ZonedDateTime
- First we will convert the date object to an instant object.
- Every instant object is associated with the zoneId so we need to give the zoneId.
- At last we will convert it into LocalDate object.
- In this program, we will convert the date object into instant using toInstant() method which returns instant object and takes no parameters.
- Now we need to assign zoneId to it using atZone() method in this we need to pass the zone Id as a parameter for default we can use ZoneId.systemDefault().
- At last, we will convert it into a LocalDate object using the toLocalDate() method.
Method 2: Using Instant and Date.getTime()
This approach is almost similar to the first one the only difference will be the way the instant object will be created.
- Here we will use Instant.ofEpochMilli() method, it takes date as an argument.
- After that again we will use atZone() method for adding the ZoneId followed by toLocalDate() method to get the LocalDate Object.
- It is the easiest approach we will use Java 9’s ofInstant() method of LocalDate class it takes two parameters.
- A first parameter is an instant object of date and the second is ZoneId.
- Here in the first argument, we will use toInstant() method to get the instant object and for the second argument we will use ZoneId.systemDefault().
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