How to use jcurses from groovy

I just tried to use JCurses from within Groovy, but I always get the following exception:

Caused by: java.lang.NullPointerException at    
    jcurses.system.Toolkit.getLibraryPath(Toolkit.java:97) at 
    jcurses.system.Toolkit.<clinit>(Toolkit.java:37)

Toolkit.java:37 :

    String url = ClassLoader.getSystemClassLoader()\
            .getResource("jcurses/system/Toolkit.class").toString();

Google told me that it could have to do with spaces within the classpath (windows), but moving the library and even using the classes instead of the .jar file was not successful.

It seems to be possible - pleac for groovy references JCurses: http://pleac.sourceforge.net/pleac_groovy/userinterfaces.html

Another way to clear the screen from within a Groovy shell script would also solve my problem. :-)

Solution

As jline is bundled with Groovy, can't you use the class jline.ANSIBuffer.ANSICodes (as is shows in the page you linked to)

print jline.ANSIBuffer.ANSICodes.clrscr()

You might also need to do:

print jline.ANSIBuffer.ANSICodes.gotoxy( 1, 1 )

If you want the cursor to go back to the top of the screen

To draw coloured text, you can do:

println new jline.ANSIBuffer().append( 'Some ' )
                              .red( 'Red' )
                              .append( ' text' )
                              .toString()