data

-

arbitrary data that was passed into the Engine constructor

args

-

arguments given to callback

import com.maplesoft.openmaple.*;

import com.maplesoft.externalcall.MapleException;

class Example

{

    public static void main( String notused[] ) throws MapleException

    {

    String mapleArgs[];

    Engine engine;

    mapleArgs = new String[1];

    mapleArgs[0] = "java";

    engine = new Engine( mapleArgs, new EngineCallBacksDefault(),

        null, null );

    try

    {

        engine.evaluate( "callback( 1,2,3,4 ):" );

    }

    catch ( MapleException me )

    {

        System.out.println( me.getMessage() );

    }

    }

}

Error, callback was not implemented by the application