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Groups > comp.lang.java.programmer > #37181

Re: Using main from abstract class in concrete class

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Eric Sosman <esosman@comcast-dot-net.invalid> writes:

> However, in this situation I think it'd be simpler for the subclass
> to do its own instantiating and just hand the object to a method of
> the superclass:
>
> 	public abstract class Abstract2 {
> 	    protected static void start(Abstract2 obj, String[] args) {
> 	        // obj is the desired instance
> 	        ...
> 	    }
> 	}
>
> 	class Concrete2 extends Abstract2 {
> 	    public static void main(String[] args) {
> 	        Abstract.start(new Concrete2(), args);
> 	    }
> 	}

I do something like that now:
    public class SQLite3 extends SQL {
        // ################ main
        public static void main(final String[] args) throws SQLException {
            SQL.mainWork(SQLite3.class.getCanonicalName(), args);
        }

The ‘problem’ is that I have to write it for every concrete class, but
that is doable.

I renamed main in the abstract class SQL to mainWork and removed
public.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Using main from abstract class in concrete class Cecil Westerhof <Cecil@decebal.nl> - 2017-08-13 11:47 +0200
  Re: Using main from abstract class in concrete class Andreas Leitgeb <avl@logic.at> - 2017-08-13 10:59 +0000
    Re: Using main from abstract class in concrete class Andreas Leitgeb <avl@logic.at> - 2017-08-13 11:38 +0000
  Re: Using main from abstract class in concrete class Cecil Westerhof <Cecil@decebal.nl> - 2017-08-13 15:43 +0200
  Re: Using main from abstract class in concrete class Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-08-13 10:32 -0400
    Re: Using main from abstract class in concrete class Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-08-13 10:37 -0400
    Re: Using main from abstract class in concrete class Cecil Westerhof <Cecil@decebal.nl> - 2017-08-13 17:17 +0200
      Re: Using main from abstract class in concrete class Andreas Leitgeb <avl@logic.at> - 2017-08-17 18:56 +0000
        Re: Using main from abstract class in concrete class Cecil Westerhof <Cecil@decebal.nl> - 2017-08-18 06:37 +0200
          Re: Using main from abstract class in concrete class Andreas Leitgeb <avl@logic.at> - 2017-08-18 19:48 +0000
            Re: Using main from abstract class in concrete class Cecil Westerhof <Cecil@decebal.nl> - 2017-08-18 23:37 +0200
              Re: Using main from abstract class in concrete class Cecil Westerhof <Cecil@decebal.nl> - 2017-08-19 01:32 +0200
  Re: Using main from abstract class in concrete class Joshua Cranmer 🐧 <Pidgeot18@verizon.invalid> - 2017-08-13 12:03 -0500

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