jython-users

[Jython-users] HOWDOI: convert from python char (single element string) to JAVA int?

[Barry G. <bar...@cs...>]

Hi,
     Swing's JMenuItem has a constructor which takes a string and an int.
It can be used like this: JMenuItem("Argh!", "A") where the "A" is a shortcut character.

I have tried to do this in jpython like this:

from java.lang import *
shortcutChar = Character.getNumericValue(String("A").charAt(0))
jmi = JMenuItem("Argh!", shortcutChar)

The values returned in shortcutChar are wrong, for example "A" and "a" both give
the value 10.

Any one knows what's up?

I have tried plain: jmi=JMenuItem("Argh!", "A") but that gets rejected.

Thanks
-Barry

Re: [Jython-users] HOWDOI: convert from python char (single element string) to JAVA int?

[Jim Trampolining.c. at D. <ji...@tr...>]

Does this help ?:

>>> upper=String("A")
>>> upperNum=u.getBytes()[0]
>>> upperNum
65 
>>> lower=String("a")
>>> lowerNum=lower.getBytes()[0]
>>> lowerNum
97
>>> type(lowerNum)
<jclass org.python.core.PyInteger at 7320312> 
>>> 

>12/18/2001 12:46:50 AM, Barry Gaunt <bar...@cs...> wrote:
>
>Hi,
>     Swing's JMenuItem has a constructor which takes a string and an int.
>It can be used like this: JMenuItem("Argh!", "A") where the "A" is a shortcut character.
>
>I have tried to do this in jpython like this:
>
>from java.lang import *
>shortcutChar = Character.getNumericValue(String("A").charAt(0))
>jmi = JMenuItem("Argh!", shortcutChar)
>
>The values returned in shortcutChar are wrong, for example "A" and "a" both give
>the value 10.
>
>Any one knows what's up?
>
>I have tried plain: jmi=JMenuItem("Argh!", "A") but that gets rejected.
>
>Thanks
>-Barry
>
>
>_______________________________________________
>Jython-users mailing list
>Jyt...@li...
>https://lists.sourceforge.net/lists/listinfo/jython-users
>
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Re: [Jython-users] HOWDOI: convert from python char (single element string) to JAVA int?

[dman <ds...@ri...>]

On Tue, Dec 18, 2001 at 09:46:50AM +0100, Barry Gaunt wrote:
| Hi,
|      Swing's JMenuItem has a constructor which takes a string and an int.
                                                                       ^^^

"A" is a string (or char), not an int.  Try JMenuItem( "Argh!", ord("A") ).


>>> java.lang.Character.getNumericValue( "A" )
10
>>> java.lang.Character.getNumericValue( "B" )
11

it looks to me like that java method is reading the character as a hex
digit, but it goes beyond the base 16 limit.

>>> java.lang.Character.getNumericValue( "F" )
15
>>> java.lang.Character.getNumericValue( "G" )
16
>>> java.lang.Character.getNumericValue( "H" )
17

-D

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