Duration class is a part of JavaFX. The Duration class defines a period of time. The Duration class is immutable so it is replaced rather than modified. There are two ways to create a Duration class:
- Using the constructor
- Using one of the static construction methods such as seconds(double) or minutes(double)
Constructors of the class:
- Duration(double m): Creates a new Duration object with a specified duration in milliseconds.
Commonly Used Methods:
| Method | Explanation |
|---|---|
| add(Duration d) | Adds the duration d to the duration object |
| subtract(Duration d) | Subtracts the duration d to the duration object |
| divide(Duration d) | Divides the duration d to the duration object |
| multiply(Duration d) | Multiplies the duration d to the duration object |
| millis(double m) | Returns a duration object with specified duration in milliseconds |
| seconds(double m) | Returns a duration object with specified duration in seconds |
| minutes(double m) | Returns a duration object with specified duration in minutes |
| hours(double m) | Returns a duration object with specified duration in hours |
| toMillis() | Returns the number of milliseconds in this period |
| toSeconds() | Returns the number of seconds in this period |
| toMinutes() | Returns the number of minutes in this period |
| toHours() | Returns the number of hours in this period |
| lessThan(Duration d) | Returns true if the specified duration is less than (<) this instance. |
| greaterThan(Duration d) | Returns true if the specified duration is greater than (>) this instance. |
| greaterThanOrEqualTo(Duration d) | Returns true if the specified duration is greater than or equal to (>=) this instance. |
| lessThanOrEqualTo(Duration d) | Returns true if the specified duration is less than or equal to (<=) this instance. |
Below programs illustrate the use of Duration class:
- Java Program to create two Duration objects and display the time in milliseconds seconds, minutes and hours: This Program creates two Duration objects named duration_1 and duration_2. The number of milliseconds is passed as arguments. The display function is called and the duration object is passed as arguments. The period of the duration is converted to hours, minutes, seconds and milliseconds using the function toHours(), toMinutes(), toSeconds(), toMillis() and the result is displayed.
Java
// Java Program to create two Duration objects and// display the time in milliseconds seconds,// minutes and hoursimport javafx.util.Duration;import java.util.*; class Duration_1 { // Main Method public static void main(String args[]) { try { // duration object Duration duration_1 = new Duration(1000000); Duration duration_2 = new Duration(100012); // display the duration System.out.println("Duration 1"); display(duration_1); System.out.println(""); System.out.println("Duration 2"); display(duration_2); } catch (Exception e) { System.err.println(e.getMessage()); } } // display function public static void display(Duration duration) { // display the details of a duration System.out.println("Duration in milliseconds: " + duration.toMillis()); System.out.println("Duration in seconds: " + duration.toSeconds()); System.out.println("Duration in minutes: " + duration.toMinutes()); System.out.println("Duration in hours: " + duration.toHours()); }} |
Output:
Duration 1 Duration in milliseconds: 1000000.0 Duration in seconds: 1000.0 Duration in minutes: 16.666666666666668 Duration in hours: 0.2777777777777778 Duration 2 Duration in milliseconds: 100012.0 Duration in seconds: 100.012 Duration in minutes: 1.6668666666666667 Duration in hours: 0.02778111111111111
- Java program to create four Duration object and display them and add two objects, multiply two objects, divide two objects and subtract two objects and display the results: This Program creates four Duration objects named duration_1, duration_2, duration_3 and duration_4. The display function is called and the duration object is passed as arguments. The period of the duration is converted to hours, minutes, seconds and milliseconds using the function toHours(), toMinutes(), toSeconds(), toMillis() and the result is displayed. The duration_1 and duration_2 are added and subtracted and the resultant object is displayed. Similarly, the duration_3 and duration_4 are divided and multiplied and the resultant object is displayed.
Java
// Java program to create four Duration object and// display them and add two objects, multiply two// objects, divide two objects and subtract two// objects and display the results.import javafx.util.Duration;import java.util.*;class Duration_2 { // Main Method public static void main(String args[]) { try { // duration object Duration duration_1 = Duration.millis(1000000); Duration duration_2 = Duration.seconds(100012); Duration duration_3 = Duration.hours(18912); Duration duration_4 = Duration.minutes(45634); // display the duration System.out.println("\nDuration 1\n"); display(duration_1); System.out.println("\nDuration 2\n"); display(duration_2); System.out.println("\nDuration 3\n"); display(duration_3); System.out.println("\nDuration 4\n"); display(duration_4); System.out.println("\nAdd duration 1 and duration 2\n"); display(duration_1.add(duration_2)); System.out.println("\nDivide duration 3 and duration 4\n"); display(duration_3.divide(duration_4)); System.out.println("\nMultiply duration 3 and duration 4\n"); display(duration_3.multiply(duration_4)); System.out.println("\nSubtract duration 1 and duration 2\n"); display(duration_1.subtract(duration_2)); } catch (Exception e) { System.err.println(e.getMessage()); } } // display method public static void display(Duration duration) { // display the details of a duration System.out.println("Duration in milliseconds: " + duration.toMillis()); System.out.println("Duration in seconds: " + duration.toSeconds()); System.out.println("Duration in minutes: " + duration.toMinutes()); System.out.println("Duration in hours: " + duration.toHours()); }} |
Output:
Duration 1 Duration in milliseconds: 1000000.0 Duration in seconds: 1000.0 Duration in minutes: 16.666666666666668 Duration in hours: 0.2777777777777778 Duration 2 Duration in milliseconds: 1.00012E8 Duration in seconds: 100012.0 Duration in minutes: 1666.8666666666666 Duration in hours: 27.781111111111112 Duration 3 Duration in milliseconds: 6.80832E10 Duration in seconds: 6.80832E7 Duration in minutes: 1134720.0 Duration in hours: 18912.0 Duration 4 Duration in milliseconds: 2.73804E9 Duration in seconds: 2738040.0 Duration in minutes: 45634.0 Duration in hours: 760.5666666666667 Add duration 1 and duration 2 Duration in milliseconds: 1.01012E8 Duration in seconds: 101012.0 Duration in minutes: 1683.5333333333333 Duration in hours: 28.058888888888887 Divide duration 3 and duration 4 Duration in milliseconds: 24.86567033352325 Duration in seconds: 0.02486567033352325 Duration in minutes: 4.1442783889205417E-4 Duration in hours: 6.907130648200903E-6 Multiply duration 3 and duration 4 Duration in milliseconds: 1.86414524928E20 Duration in seconds: 1.86414524928E17 Duration in minutes: 3.1069087488E15 Duration in hours: 5.178181248E13 Subtract duration 1 and duration 2 Duration in milliseconds: -9.9012E7 Duration in seconds: -99012.0 Duration in minutes: -1650.2 Duration in hours: -27.503333333333334
Note: The above programs might not run in an online IDE. Please use an offline compiler.
Reference: https://docs.oracle.com/javase/8/javafx/api/javafx/util/Duration.html
