Express a duration in term of HH:MM:SS : Date Format « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. Date Format

import java.util.Calendar;

public class Main {
  public static void main(String args[]) {
    Calendar cal1 = Calendar.getInstance();
    Calendar cal2 = Calendar.getInstance();
    cal2.add(Calendar.HOUR, 2);
    cal2.add(Calendar.MINUTE, 42);
    cal2.add(Calendar.SECOND, 12);
    long secs = (cal2.getTimeInMillis() - cal1.getTimeInMillis()) / 1000;
    String display = String.format("%02d:%02d:%02d", secs / 3600, (secs % 3600) / 60, (secs % 60));
    System.out.println(display);

  }
}

2.41.Date Format
	2.41.1.	Date Parsing and Formatting with DateFormat
	2.41.2.	Parsing the Time Using a Custom Format
	2.41.3.	Parse with a custom format
	2.41.4.	Parse with a default format
	2.41.5.	Parse string date value input with SimpleDateFormat('dd-MMM-yy')
	2.41.6.	Parse a date and time
	2.41.7.	Parse string date value input with SimpleDateFormat('E, dd MMM yyyy HH:mm:ss Z')
	2.41.8.	Parse string date value with default format: DateFormat.getDateInstance(DateFormat.DEFAULT)
	2.41.9.	Leniency
	2.41.10.	Formatting String Symbols for SimpleDateFormat
	2.41.11.	SimpleDateFormat: hh:mm:ss, dd MMM yyyy hh:mm:ss zzz, E MMM dd yyyy
	2.41.12.	Simply format a date as YYYYMMDD
	2.41.13.	Express a duration in term of HH:MM:SS
	2.41.14.	Date Format with SimpleDateFormat
	2.41.15.	Demonstrate date formats with different DateFormat constants
	2.41.16.	Demonstrate time formats.
	2.41.17.	DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.MEDIUM)
	2.41.18.	print out the current date and time
	2.41.19.	Date Era change
	2.41.20.	Format Date with System.out.format
	2.41.21.	SimpleDateFormat
	2.41.22.	Formatting Dates and Times
	2.41.23.	Four different date formats for four countries: US, UK, GERMANY, FRANCE
	2.41.24.	Various Date format
	2.41.25.	Display date with day name in a short format
	2.41.26.	Display date with a short day and month name
	2.41.27.	Format a date into dd/mm/yyyy
	2.41.28.	Format current date and time with the SimpleDateFormat: dd/MM/yyyy
	2.41.29.	Format current date and time with the SimpleDateFormat: HH:mm:ss
	2.41.30.	Formatting Symbols for SimpleDateFormat
	2.41.31.	Formatting the Time Using a Custom Format
	2.41.32.	Change date formatting symbols
	2.41.33.	Get a List of Short Month Names
	2.41.34.	Get a List of Weekday Names
	2.41.35.	Get a List of Short Weekday Names
	2.41.36.	Time in 12-hour format
	2.41.37.	Time in 24-hour format
	2.41.38.	Date and time with month
	2.41.39.	Date and time with day and month fully spelled-out
	2.41.40.	Output current time: %tc
	2.41.41.	Formatter that caches formatted date information
	2.41.42.	RFC date format
	2.41.43.	A formatter that formats dates to show the elapsed time relative to some base date.