JapaneseChronology eras() method in Java with Example

The eras() method of java.time.chrono.JapaneseChronology class is used to retrieve all the eras comes under this particular Japanese chronology. 

Syntax:

public List eras()

Parameter: This method does not accept any argument as a parameter. 

Return Value: This method returns all the eras comes under this particular Japanese chronology. 

Below are the examples to illustrate the eras() method: 
Example 1:

Java

// 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
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();

            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = hidate.getChronology();

            // getting all JapaneseEras present
            // by using eras() method
            List<Era> list = crono.eras();

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

Output:

JapaneseEra is: Meiji

Example 2:

Java

// 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
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();

            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = hidate.getChronology();

            // getting all JapaneseEras present
            // by using eras() method
            List<Era> list = crono.eras();

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

            // display the result
            System.out.println("List of IsoEra : ");
            for (int i = 0; i < 4; i++)
                System.out.println(iter.next());
        }
        catch (DateTimeException e) {
            System.out.println(
                "JapaneseEra is invalid");
            System.out.println(
                "Exception thrown: " + e);
        }
    }
}

Output:

List of IsoEra : 
Meiji
Taisho
Showa
Heisei

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/JapaneseChronology.html#eras–