Convert date value to long value in milliseconds

import java.util.Date;

public class Main {
  public static void main(String args[]) {
 
    Date date = new Date();
    System.out.println("Date is : " + date);
 
    System.out.println("Milliseconds since January 1, 1970, 00:00:00 GMT : "
        + date.getTime());
  }
}