Re: How do I know which choice box has been selected?

On Feb 20, 12:48 am, "j.b.allw...@mmu.ac.uk" <j.b.allw...@mmu.ac.uk>

(post reorganised to suit my reply)


Excuse me? If the version of the JVM/SDK
does not do 'anything' it is obviously broken.

Always copy/paste specific error messages,
rather than provide a vague and incomplete
description of the result.
...


<sscce>
import java.awt.*;
import java.awt.event.*;

class ChoiceTest extends Panel implements ItemListener {

  TextArea ta;

  ChoiceTest() {
    super(new BorderLayout());
    ta = new TextArea();
    add( ta, BorderLayout.CENTER );

    Panel p = new Panel( new GridLayout() );
    add(p, BorderLayout.NORTH );
    for (int ii=0; ii<5; ii++) {
      Choice choice = new Choice();
      choice.addItemListener(this);
      for (int jj=0; jj<10; jj++) {
        choice.add( "Ch.: " + ii + " item: " + jj );
      }
      p.add(choice);
    }
  }

  public void itemStateChanged(ItemEvent ie) {
    ta.append( ie.getSource().toString() + "\n" );
  }

  public static void main(String[] args) {
    Frame f = new Frame("Choice Test");
    ChoiceTest ct = new ChoiceTest();
    f.add( ct );
    f.pack();

    f.addWindowListener( new WindowAdapter(){
      public void windowClosing(WindowEvent we) {
        System.exit(0);
      }
    } );

    f.setVisible(true);
  }
}
</sscce>

Andrew T.