Java 中的等时技术 eraOf()方法，示例

原文:https://www . geesforgeks . org/isochronomics-eraof-method-in-Java-with-example/

Java . time . chrono . IsoChronology类的 eraOf() 方法用于通过使用数值 0 和 1 来检索 Iso Era，因为 isochronology 只包含两个 HijrahEra。

语法:

public IsoEra eraOf(int eraValue)

参数:该方法将误差值整数作为生成等熵线的参数。

返回值:该方法通过使用数值 0 和 1 返回 Iso Era ，因为 IsoCronology 只包含两个 HijrahEra。

以下是举例说明 eraOf() 方法的例子:

例 1:

// Java program to demonstrate
// eraOf() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing
            // LocalDate Object
            LocalDate hidate = LocalDate.now();

            // getting IsoChronology
            // used in LocalDate
            IsoChronology crono
                = hidate.getChronology();

            // getting IsoEra for the
            // given integer value
            // by using eraOf() method
            IsoEra era = crono.eraOf(0);

            // display the result
            System.out.println("IsoEra is: "
                               + era);
        }
        catch (DateTimeException e) {
            System.out.println("HijrahEra is invalid");
            System.out.println("Exception thrown: " + e);
        }
    }
}

输出:

IsoEra is: BCE

例 2:

// Java program to demonstrate
// eraOf() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing
            // LocalDate Object
            LocalDate hidate = LocalDate.now();

            // getting IsoChronology
            // used in LocalDate
            IsoChronology crono
                = hidate.getChronology();

            // getting IsoEra for the
            // given integer value
            // by using eraOf() method
            IsoEra era = crono.eraOf(1);

            // display the result
            System.out.println("IsoEra is: "
                               + era);
        }
        catch (DateTimeException e) {
            System.out.println("HijrahEra is invalid");
            System.out.println("Exception thrown: " + e);
        }
    }
}

输出:

IsoEra is: CE

参考:https://docs . Oracle . com/javase/9/docs/API/Java/time/chrono/isochronomics . html # eraOf-int-

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