Java 中的计时单位是指定的估算()方法，示例

原文:https://www . geesforgeks . org/chronounit-is durationestimated-method-in-Java-with-examples/

计时单位枚举的方法是用来检查计时单位的持续时间是否是一个估计值。该计时单位中的所有时间单位都被认为是准确的，而该计时单位中的所有日期单位都被认为是估计的。

语法:

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，此方法返回真，如果准确，返回假。

下面的程序说明了计时单位. isDurationEstimated()方法: 程序 1:

// 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);
    }
}

Output:

NANOS is Duration Estimated attribute:false

程序 2:

// 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);
    }
}

Output:

DAYS is Duration Estimated attribute:true

参考文献:https://docs . Oracle . com/javase/10/docs/API/Java/time/temporal/chronounit . html # isDurationEstimated()

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