Java 中的持续时间获取方法，示例

原文:https://www . geesforgeks . org/duration-gettemporalunit-method-in-Java-with-examples/

java.time 包中 Duration 类的 get(TemporalUnit) 方法用于获取作为参数传递的单位值。该方法仅支持单位秒和纳米，其余均导致异常。

语法:

public long get(TemporalUnit unit)

参数:该方法接受一个参数单位，该单位是要获取其值的时间单位。

返回值:该方法返回作为参数传递的单位的一个长值。

异常:此方法抛出:

  • Abnormal date and time : If the company is not supported.
  • 不支持的 dtime type exception:哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟哟。

下面的例子说明了 Duration.get()方法:

例 1:

// Java code to illustrate get() method

import java.time.Duration;
import java.time.temporal.*;

public class GFG {
    public static void main(String[] args)
    {

        // Get the text
        String time = "P2DT3H4M";

        // Duration using parse() method
        Duration duration = Duration.parse(time);

        // Duration using get() method
        long getSeconds
            = duration.get(ChronoUnit.SECONDS);

        System.out.println("Seconds: "
                           + getSeconds);

        // Duration using get() method
        long getNanos
            = duration.get(ChronoUnit.NANOS);

        System.out.println("Nanos: "
                           + getNanos);
    }
}

输出:

Seconds: 183840
Nanos: 0

例 2:

// Java code to illustrate get() method

import java.time.Duration;
import java.time.temporal.*;

public class GFG {
    public static void main(String[] args)
    {

        // Get the text
        String time = "P2DT3H4M";

        // Duration using parse() method
        Duration duration
            = Duration.parse(time);

        try {
            // Duration using get() method
            long getMinutes
                = duration.get(ChronoUnit.MINUTES);
        }
        catch (Exception e) {
            System.out.println("Exception: " + e);
        }
    }
}

输出:

Exception:
 java.time.temporal.UnsupportedTemporalTypeException:
 Unsupported unit: Minutes

参考: 甲骨文文档

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