Java Calendar method getTimeInMillis() to collect UTC milliseconds from the epoch of a Calendar object

Calendar.getTimeInMillis() UTC milliseconds from the epoch
Returns long value showing UTC milliseconds from the epoch
Examples with output

package my_proj;
 
import java.util.Calendar;
 
public class my_first {
public static void main(String[] args) {
Calendar my_cal_d1 = Calendar.getInstance();// created calendar 
System.out.println( my_cal_d1.getTime());
System.out.println( my_cal_d1.getTimeInMillis());
}
}

Output

Thu Mar 05 14:48:00 IST 2020
1583399880500

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Java