Java 中的等时年代()方法，示例

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

Java . time . chrono . isochronology类的纪元()方法用于检索该特定 Iso 年表下的所有纪元。

语法:

public List eras()

参数:此方法不接受任何参数作为参数。

返回值:该方法返回该特定 Iso 年表下的所有年代。

以下是说明纪元()方法的示例:

例 1:

// Java program to demonstrate
// eras() 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 all IsoEras present
            // by using eraOf() method
            List<Era> list = crono.eras();

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

输出:

IsoEra is: BCE

例 2:

// Java program to demonstrate
// eras() 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 all IsoEras present
            // by using eraOf() method
            List<Era> list = crono.eras();

            // getting list Iterator
            Iterator iter = list.iterator();

            // display the result
            System.out.println("List of IsoEra : "
                               + "\n"
                               + iter.next() + "\n"
                               + iter.next());
        }
        catch (DateTimeException e) {
            System.out.println("IsoEra is invalid");
            System.out.println("Exception thrown: " + e);
        }
    }
}

输出:

List of IsoEra : 
BCE
CE

参考:https://docs . Oracle . com/javase/9/docs/API/Java/time/chrono/isochronomics . html # eras–

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