Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #10833

Re: Generics ?

Show all headers | View raw

On 12/17/2011 8:18 AM, John B. Matthews wrote:
> In article<jcem2m$gbm$1@dont-email.me>,
>   Knute Johnson<nospam@knutejohnson.com>  wrote:
>
>> Using Java 7, given the class file:
>>
>> import javax.swing.*;
>>
>> public class KList extends JList {
>>       ListModel model = new DefaultListModel();
>>
>>       public KList() {
>>           setModel(model);
>>       }
>> }
>
> I defined a generic subclass of JList:
>
>    class KList<E>  extends JList<E>  {
>
>        public KList(ListModel<E>  model) {
>            this.setModel(model);
>        }
>    }
>
> Then I created a ListModel<String>:
>
>    DefaultListModel<String>  dlm = new DefaultListModel<>();
>    dlm.add(...);
>
> Then I used it to create a new KList:
>
>    KList<String>  list = new KList<>(dlm);
>
> Here's my sscce:
>
> import java.text.DateFormat;
> import java.text.SimpleDateFormat;
> import java.util.Calendar;
> import java.util.GregorianCalendar;
> import javax.swing.*;
>
> /** @see http://stackoverflow.com/a/5372169/230513 */
> public class JakesList {
>
>      private static final DateFormat df =
>          new SimpleDateFormat("dd-MMM-yyyy");
>
>      private static class KList<E>  extends JList<E>  {
>
>          public KList(ListModel<E>  model) {
>              this.setModel(model);
>          }
>      }
>
>      private static void createAndShowGUI() {
>          DefaultListModel<String>  dlm = new DefaultListModel<>();
>          for (int i = 0; i<  10; i++) {
>              GregorianCalendar knownDate = new GregorianCalendar();
>              knownDate.add(Calendar.DAY_OF_MONTH, 3 * i);
>              dlm.add(i, df.format(knownDate.getTime()));
>          }
>          KList<String>  list = new KList<>(dlm);
>          JOptionPane.showMessageDialog(null, list);
>      }
>
>      public static void main(String args[]) throws Exception {
>          SwingUtilities.invokeLater(new Runnable() {
>
>              @Override
>              public void run() {
>                  createAndShowGUI();
>              }
>          });
>      }
> }
>

Thanks very much John, that got me going in the right direction.

-- 

Knute Johnson

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Generics ? Knute Johnson <nospam@knutejohnson.com> - 2011-12-15 21:48 -0800
  Re: Generics ? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-15 22:03 -0800
    Re: Generics ? Tassilo Horn <tassilo@member.fsf.org> - 2011-12-16 08:30 +0100
      Re: Generics ? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-16 00:08 -0800
  Re: Generics ? Roedy Green <see_website@mindprod.com.invalid> - 2011-12-16 02:10 -0800
    Re: Generics ? Knute Johnson <nospam@knutejohnson.com> - 2011-12-16 22:01 -0800
      Re: Generics ? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-16 23:30 -0800
        Re: Generics ? Knute Johnson <nospam@knutejohnson.com> - 2011-12-17 10:20 -0800
          Re: Generics ? markspace <-@.> - 2011-12-17 10:54 -0800
            Re: Generics ? Knute Johnson <nospam@knutejohnson.com> - 2011-12-17 11:25 -0800
              Re: Generics ? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-12-17 21:20 -0800
                Re: Generics ? "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-12-18 21:08 +1100
                Re: Generics ? Lew <lewbloch@gmail.com> - 2011-12-18 08:17 -0800
                Re: Generics ? markspace <-@.> - 2011-12-18 08:43 -0800
          Re: Generics ? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-17 11:33 -0800
            Re: Generics ? Knute Johnson <nospam@knutejohnson.com> - 2011-12-17 11:40 -0800
              Re: Generics ? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-17 11:47 -0800
              Re: Generics ? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-17 15:13 -0500
      Re: Generics ? Roedy Green <see_website@mindprod.com.invalid> - 2011-12-17 02:46 -0800
  Re: Generics ? "John B. Matthews" <nospam@nospam.invalid> - 2011-12-17 11:18 -0500
    Re: Generics ? Knute Johnson <nospam@knutejohnson.com> - 2011-12-17 11:16 -0800

csiph-web