Issue2279

Missing currently in https://github.com/jythontools/jython/blob/master/src/org/python/core/PyIterator.java#L70 - we have coercion to Iterator, Iterable, and Collection, but not to a Java array

We likely should consider other iterable classes, such as PySequence, BaseSet, etc.

Various examples:

$ dist/bin/jython
Jython 2.7.1b2 (default:f528d540f4b3, Nov 24 2015, 08:25:24)
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0_75
Type "help", "copyright", "credits" or "license" for more information.
>>> import java
>>> java.util.Arrays.asList(xrange(10))
[<org.python.core.JavaIterator object at 0x2>]
>>> java.util.Arrays.asList(list(xrange(10)))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Perhaps more important is support in varargs:

>>> java.lang.String.format("arg0=%d arg1=%d arg2=%d", 6, 7, 8)
u'arg0=6 arg1=7 arg2=8'
>>> java.lang.String.format("arg0=%d arg1=%d arg2=%d", [6, 7, 8])
u'arg0=6 arg1=7 arg2=8'
>>> java.lang.String.format("arg0=%d arg1=%d arg2=%d", xrange(3))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
	at java.util.Formatter$FormatSpecifier.failConversion(Formatter.java:4045)
	at java.util.Formatter$FormatSpecifier.printInteger(Formatter.java:2748)
	at java.util.Formatter$FormatSpecifier.print(Formatter.java:2702)
	at java.util.Formatter.format(Formatter.java:2488)
	at java.util.Formatter.format(Formatter.java:2423)
	at java.lang.String.format(String.java:2790)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)

java.util.IllegalFormatConversionException: java.util.IllegalFormatConversionException: d != org.python.core.JavaIterator

But of course if we take the list of the iterator, it works:

>>> java.lang.String.format("arg0=%d arg1=%d arg2=%d", list(xrange(3)))
u'arg0=0 arg1=1 arg2=2'

Fixed as of https://hg.python.org/jython/rev/1e7c082d089d