Java Program to get the number of hours in this duration

At first, set the Duration −

Duration duration = Duration.ofDays(25);

Now, get the number of hours from the above Duration that has 25 days −

duration.toHours()

Example

 Live Demo

import java.time.Duration;
public class Demo {
   public static void main(String[] args) {
      Duration duration = Duration.ofDays(25);
      System.out.println("Hours in 25 days = "+duration.toHours());
   }
}

Output

Hours in 25 days = 600