Java中的 ChronoUnit isDurationEstimated() 方法及示例
ChronoUnit 枚举的isDurationEstimated()方法用于检查 ChronoUnit 的持续时间是否是估计值。此 ChronoUnit 中的所有时间单位都被认为是准确的,而此 ChronoUnit 中的所有日期单位都被认为是估计的。
句法:
public boolean isDurationEstimated()
参数:此方法不接受任何内容。
返回值:如果估计持续时间,则此方法返回true ,如果准确则返回false 。
下面的程序说明了 ChronoUnit.isDurationEstimated() 方法:
方案一:
// Java program to demonstrate
// ChronoUnit.isDurationEstimated() method
import java.time.temporal.ChronoUnit;
public class GFG {
public static void main(String[] args)
{
// get ChronoUnit
ChronoUnit chronoUnit
= ChronoUnit.valueOf("NANOS");
// apply isDurationEstimated()
boolean isDurationEstimatedAttribute
= chronoUnit.isDurationEstimated();
// print
System.out.println(
"NANOS"
+ " is Duration Estimated attribute:"
+ isDurationEstimatedAttribute);
}
}
输出:
NANOS is Duration Estimated attribute:false
方案二:
// Java program to demonstrate
// ChronoUnit.isDurationEstimated() method
import java.time.temporal.ChronoUnit;
public class GFG {
public static void main(String[] args)
{
// get ChronoUnit
ChronoUnit chronoUnit
= ChronoUnit.valueOf("DAYS");
// apply isDurationEstimated()
boolean isDurationEstimatedAttribute
= chronoUnit.isDurationEstimated();
// print
System.out.println(
"DAYS"
+ " is Duration Estimated attribute:"
+ isDurationEstimatedAttribute);
}
}
输出:
DAYS is Duration Estimated attribute:true
参考资料:https: Java/time/temporal/ChronoUnit.html#isDurationEstimated()