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Groups > comp.lang.java.programmer > #14940

Re: unchecked conversion warning.

From Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at>
Newsgroups comp.lang.java.programmer
Subject Re: unchecked conversion warning.
Date 2012-05-30 13:48 +0000
Organization A noiseless patient Spider
Message-ID <slrnjsc99d.u9l.avl@gamma.logic.tuwien.ac.at> (permalink)
References <3s7cs7hd18l0ffci55ns0286n4lc4cutlu@4ax.com>

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Jens <Jens> wrote:
> This code compiles with an 'unchecked conversion' warning.
> import java.util.Vector;
> public class genericsdemo
> {
>   private static Vector<Vector> vdata = new Vector<Vector>(); //a Vector of Vectors

private static Vector<Vector<Object>> vdata = new Vector<Vector<Object>>(); //a Vector of Vectors

>   private static Vector<Object> vrow  = new Vector<Object>(); //a row
>
>   public static void main(String args[]) {
>     vrow.add(null); //two columns in the row
>     vrow.add(null);
>
>     vdata.add(vrow); //add the row to the Vector of Vectors
>
>     Vector vtmp = getrow(); //test

Vector<Object> vtmp = ...

>   }
>
>   private static Vector<Object> getrow() {
>     return vdata.elementAt(0);  //warning: [unchecked] unchecked conversion

This is solved by changed vdata declaration above.

>   }
> }
>
> JensJ

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Thread

unchecked conversion warning. Jens - 2012-05-30 15:32 +0200
  Re: unchecked conversion warning. Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-05-30 13:48 +0000
    Re: unchecked conversion warning. Jens - 2012-05-30 15:52 +0200
  Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-05-30 07:54 -0700
    Re: unchecked conversion warning. Jens - 2012-05-31 22:23 +0200
      Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-05-31 13:40 -0700
      Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-05-31 16:50 -0400
        Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-05-31 17:18 -0700
        Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-01 08:14 +0200
          Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-01 08:48 -0400
            Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-01 07:32 -0700
            Re: unchecked conversion warning. Roedy Green <see_website@mindprod.com.invalid> - 2012-06-10 12:16 -0700
              Re: unchecked conversion warning. Martin Gregorie <martin@address-in-sig.invalid> - 2012-06-10 22:08 +0000
                Re: unchecked conversion warning. Lew <noone@lewscanon.com> - 2012-06-10 17:09 -0700
                Re: unchecked conversion warning. Martin Gregorie <martin@address-in-sig.invalid> - 2012-06-11 01:31 +0000
        Re: unchecked conversion warning. Jim Janney <jjanney@shell.xmission.com> - 2012-06-01 08:41 -0600
          Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-01 08:44 -0700
            Re: unchecked conversion warning. markspace <-@.> - 2012-06-01 09:08 -0700
            Re: unchecked conversion warning. Gene Wirchenko <genew@ocis.net> - 2012-06-01 09:31 -0700
            Re: unchecked conversion warning. Jim Janney <jjanney@shell.xmission.com> - 2012-06-01 11:02 -0600
            Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-01 13:54 -0400
              Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-01 16:44 -0700
                Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-01 20:24 -0400
                Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-01 19:36 -0700
          Re: natural/native language capabilities (was: unchecked conversion warning.) Jim Janney <jjanney@shell.xmission.com> - 2012-06-01 11:01 -0600
        Re: unchecked conversion warning. Roedy Green <see_website@mindprod.com.invalid> - 2012-06-10 12:13 -0700
        Re: unchecked conversion warning. Arne Vajhøj <arne@vajhoej.dk> - 2012-06-20 19:28 -0400
  Re: unchecked conversion warning. Broad Liyn <broadliyn@gmail.com> - 2012-06-10 21:52 -0700
    Re: unchecked conversion warning. Lew <noone@lewscanon.com> - 2012-06-10 23:50 -0700
    Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-11 00:06 -0700
      Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-16 15:17 +0200
        Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-06-18 12:28 -0700
          Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-19 23:14 +0200
            Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-06-19 17:15 -0700
      Re: unchecked conversion warning. Arne Vajhøj <arne@vajhoej.dk> - 2012-06-20 19:22 -0400
    Re: unchecked conversion warning. Arne Vajhøj <arne@vajhoej.dk> - 2012-06-20 19:20 -0400

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