What is DateUtils.setMilliseconds() in Java?

How to import `DateUtils`

The definition of DateUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file:

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.12.0</version>
</dependency>

For other versions of the commons-lang package, refer to the Maven Repository.

You can import the DateUtils class as follows:

import org.apache.commons.lang3.time.DateUtils;

Syntax

public static Date setMilliseconds(final Date date, final int amount)

Parameters

final Date date: The original Date object.
final int amount: The new value of millisecond to set.

Return value

This method returns a new Date object with the millisecond field set to the specified value.

import org.apache.commons.lang3.time.DateUtils;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main{
    public static void main(String[] args) {
        Date date = new Date();
        DateFormat dateFormat = new SimpleDateFormat("dd/MM/yy HH:mm:ss:SS");
        int newMilliSecondValue = 999;
        Date newDate = DateUtils.setMilliseconds(date, newMilliSecondValue);
        System.out.printf("DateUtils.setMilliseconds(%s, %s) = %s", dateFormat.format(date), newMilliSecondValue, dateFormat.format(newDate));
    }
}

Explanation

From lines 1 to 5, we import the relevant packages.
In line 7, we create a Main class.
In line 9, we make a main() function.
In line 10, we create a Date object.
In line 11, we create a SimpleDateFormat object with the format in which we want the dates to be printed.
In line 12, we define the value of milliseconds to set.
In line 13, we use the setMilliseconds() method to set the milliseconds field of the date object defined in line 10.
In line 14, we print the original date, milliseconds value, and the new date object we obtained in line 13.