test2

yandex.java

package test;

import java.util.ArrayList;
import java.util.List;

public final class Currency {

    public static final Currency EU = new Currency("EU");
    public static final Currency USD = new Currency("USD");

    private final static List<Currency> values = new ArrayList<>();

    private final int ordinal;
    private final String name;

    private Currency(String name) {
        ordinal = values.size();
        values.add(this);
        this.name = name;
    }

    public int getOrdinal() {
        return ordinal;
    }

    public String getName() {
        return name;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Currency currency = (Currency) o;

        return ordinal == currency.ordinal;

    }

    @Override
    public int hashCode() {
        return ordinal;
    }

    public static Currency findByName(String value) {
        for (Currency currency : values) {
            if (currency.getName().equals(value)) {
                return currency;
            }
        }
        throw new RuntimeException("Enum not present with name " + value);
    }
}