Calendar getTimeInMillis() Method in Java with Examples

The getTimeInMillis() method in Calendar class is used to return the current time of this Calendar in Milliseconds.
Syntax:

public long getTimeInMillis()

Parameters: The method does not take any parameters.
Return Value: The method returns the current time of this Calendar in millisecond.
Below programs illustrate the working of getTimeInMillis() Method of Calendar class: 
Example 1:

Java

// Java code to illustrate
// getTimeInMillis() method

import java.util.*;

public class Calendar_Demo {

    public static void main(String args[])
        throws InterruptedException
    {

        // Creating a calendar
        Calendar calndr1 = Calendar.getInstance();

        // Displaying the current time
        System.out.println("The Current Time"
                           + " is: "
                           + calndr1.getTimeInMillis());

        // Adding few delay
        Thread.sleep(10000);

        // Creating another calendar
        Calendar calndr2 = Calendar.getInstance();

        // Displaying the upcoming time
        System.out.println("The Upcoming Time"
                           + " is: "
                           + calndr2.getTimeInMillis());
    }
}

Output:

The Current Time is: 1550725664034
The Upcoming Time is: 1550725674053

Example 2:

Java

// Java code to illustrate
// getTimeInMillis() method

import java.util.*;

public class Calendar_Demo {

    public static void main(String args[])
        throws InterruptedException
    {

        // Creating a calendar
        Calendar calndr1 = Calendar.getInstance();

        // Displaying the current time
        System.out.println("The Current Time"
                           + " is: "
                           + calndr1.getTimeInMillis());

        // Adding few delay
        Thread.sleep(5000);

        // Creating another calendar
        Calendar calndr2 = Calendar.getInstance();

        // Displaying the upcoming time
        System.out.println("The Upcoming Time"
                           + " is: "
                           + calndr2.getTimeInMillis());
    }
}

Output:

The Current Time is: 1550725683182
The Upcoming Time is: 1550725688208

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getTimeInMillis–