NullPointerException when getting Currency for CurrencyCode.MRU.

[jaredfishy]

Trying to retrieve the Currency object for MRU throws a NullPointerException.

Code to recreate issue:

Currency currency = CurrencyCode.MRU.getCurrency();

[TakahikoKawasaki]

Currency.getCurrency() is a wrapper for java.util.Currency.getInstance(String). If the getInstance(String) returns null or throws an IllegalArgumentException, Currency.getCurrency() returns null.

$ java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

$ cat TestMRUCurrency.java 
public class TestMRUCurrency
{
    public static void main(String[] args)
    {
        System.out.println(java.util.Currency.getInstance("MRU"));
    }
}

$ java TestMRUCurrency
Exception in thread "main" java.lang.IllegalArgumentException
	at java.util.Currency.getInstance(Currency.java:345)
	at java.util.Currency.getInstance(Currency.java:310)
	at TestMRUCurrency.main(TestMRUCurrency.java:5)