Re: [Jython-users] Boolean question

[Kevin B. <kb...@ca...>]

Steve Yegge wrote:

> I've found a case where it doesn't work:
>
>      from java.lang import Boolean
>      ...
>      obj.setProperty("foobar", Boolean.FALSE)
>
> I also tried:
>
>      obj.setProperty("foobar", 0)
>
> but that somehow turns 0 into an int value and uses that,
> where I really wanted a boolean.
>

I didn't see a public answer for this question, so here goes.

>>> from java.lang import *
>>> from java.util import *
>>> m = HashMap()
>>> m.put( "one", Boolean.FALSE )
>>> m.put( "two", Boolean( 0 ) )
>>> m
{two=false, one=0}
>>>

The problem is that jython converts the Boolean.FALSE to an 'int' for
you to work with in jython (normal attribute access, etc.).  To pass in
a Boolean object, you need to explicitly specify it via constructing one
as your parameter.

>>> Boolean.FALSE
0
>>> Boolean( Boolean.FALSE )
false
>>>

kb