Java程序将此持续时间转换为总长度（以毫秒为单位）
借助此功能，可以获取以天，小时和分钟为单位的毫秒数。首先，设置持续时间-
Duration d1 = Duration.ofDays(20); Duration d2 = Duration.ofHours(100); Duration d3 = Duration.ofMinutes(150);
将上述持续时间转换为纳秒-
System.out.println("Milliseconds in 20 days = "+d1.toMillis());
System.out.println("Milliseconds in 100 hours = "+d2.toMillis());
System.out.println("Milliseconds in 150 minutes = "+d3.toMillis());示例
import java.time.Duration;
public class Demo {
public static void main(String[] args) {
Duration d1 = Duration.ofDays(20);
Duration d2 = Duration.ofHours(100);
Duration d3 = Duration.ofMinutes(150);
System.out.println("Milliseconds in 20 days = "+d1.toMillis());
System.out.println("Milliseconds in 100 hours = "+d2.toMillis());
System.out.println("Milliseconds in 150 minutes = "+d3.toMillis());
}
}输出结果
Milliseconds in 20 days = 1728000000 Milliseconds in 100 hours = 360000000 Milliseconds in 150 minutes = 9000000