The ofHours(long) method of Duration Class in java.time package is used to get a duration in a 1 hour format. In this method, the seconds are calculated as total seconds in 1 hour format, i.e. 3600 seconds per hour. Syntax:
public static Duration ofHours(long hours)
Parameters: This method accepts a parameter hours which is the number of hours. It can be positive or negative. Return Value: This method returns a Duration representing the time in 1 hour format. Exception: This method throws ArithmeticException if the input hours exceeds the capacity of Duration. Below examples illustrate the Duration.ofHours() method: Example 1:Â
Java
// Java code to illustrate ofHours(long) methodÂ
import java.time.Duration;Â
public class GFG {Â Â Â Â public static void main(String[] args)Â Â Â Â {Â
        // input number of Hours        long noOfHours = 5;Â
        // Duration using ofHours() method        Duration duration            = Duration.ofHours(noOfHours);Â
        System.out.println(duration.getSeconds());    }} |
Output:
18000
Example 2:Â
Java
// Java code to illustrate ofHours(long) methodÂ
import java.time.Duration;Â
public class GFG {Â Â Â Â public static void main(String[] args)Â Â Â Â {Â
        // input number of Hours        long noOfHours = -214545;Â
        // Duration using ofHours() method        Duration duration            = Duration.ofHours(noOfHours);Â
        System.out.println(duration.getSeconds());    }} |
Output:
-772362000
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/Duration.html#ofHours-long-
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