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  1. JDK
  2. JDK-1230659

Win 32 only: list.clear() does not clear all items in list.

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    Details

    • Subcomponent:
    • Resolved In Build:
      1.0.2
    • CPU:
      x86
    • OS:
      windows_nt
    • Verification:
      Verified

      Description

      Win 32 only: list.clear() does not clear all items from list.
      Note: see workaround

      Steps to reproduce
      Compile the following code
      run java ListTest
      Press <Change List>


      /* tests the list stuff */

      import java.awt.*;
      import java.applet.Applet;

      public class ListTest extends Applet
      {
          public final String ChangeList = "Change List";
          public final String GetSelected = "Get Selected Index";
          List list;
          Label getVisLabel;
          Label getSelectLabel;
          Label makeVisLabel;
          Label listSizeLabel;
          
          public void init()
          {
             setLayout( new BorderLayout() );
             list = new List(3, false);
             list.addItem("One");
             list.addItem("Two");
             list.addItem("Three");
             list.addItem("Four");
             list.addItem("Five");
             list.addItem("Six");
             Panel p2 = new Panel();
             p2.add(list);

             Panel panel = new Panel();
             panel.setLayout( new GridLayout(4, 2) );
             panel.add( new Button("makeVisible") );
             panel.add( makeVisLabel = new Label() );
             panel.add( new Button("getVisibleIndex") );
             panel.add( getVisLabel = new Label("Nothing") );
             panel.add( new Button(GetSelected) );
             panel.add( getSelectLabel = new Label("Nothing") );
             panel.add( new Button(ChangeList) );
             panel.add( listSizeLabel = new Label() );
             updateLabels();

             add("West", panel);
             add("Center", p2);

             resize(400, 400);

          }

          public void updateLabels()
          {
            makeVisLabel.setText( Integer.toString( list.countItems() -1 ) );
            listSizeLabel.setText( Integer.toString( list.countItems() ) );
          }

          public boolean action(Event evt, Object obj)
          {
             if (evt.target instanceof Button)
             {
                String text = (String) obj;
          
                if ( text.equals("makeVisible") )
                   list.makeVisible(list.countItems() - 1);
                else if ( text.equals("getVisibleIndex") )
                   getVisLabel.setText( Integer.toString( list.getVisibleIndex() ) );
                else if ( text.equals(GetSelected) )
                   getSelectLabel.setText( Integer.toString( list.getSelectedIndex() ) );
                else if ( text.equals(ChangeList) )
                   changeList();
                else
                   return false;

                updateLabels();
                return true;

             } // end if button
             
             return super.action(evt, obj);
          }


          public void changeList()
          {
             // local variables
             int listCount = list.countItems();
            
             list.clear(); // fails on win32
             // list.delItems(0, listCount - 1); // workaround

             for(int i = 0; i < listCount; ++i)
               list.addItem( Integer.toString(i) );

          }

          public static void main(String args[])
          {
             AppletFrame.startApplet("ListTest", "List Test", args);
          }
      }



      /* Generic Applet to Application Frame
       * @(#)AppletFrame.java 1.4 12/02/95 15:28:07
       * @author Kevin A. Smith
       *
       */

      import java.awt.Frame;
      import java.awt.Event;
      import java.awt.Dimension;
      import java.applet.Applet;

      // Applet to Application Frame window
      class AppletFrame extends Frame
      {

          public static void startApplet(String className,
                                         String title,
                                         String args[])
          {
             // local variables
             Applet a;
             Dimension appletSize;

             try
             {
                // create an instance of your applet class
                a = (Applet) Class.forName(className).newInstance();
             }
             catch (ClassNotFoundException e) { return; }
             catch (InstantiationException e) { return; }
             catch (IllegalAccessException e) { return; }

             // initialize the applet
             a.init();
             a.start();
        
             // create new application frame window
             AppletFrame f = new AppletFrame(title);
        
             // add applet to frame window
             f.add("Center", a);
        
             // resize frame window to fit applet
             // assumes that the applet sets its own size
             // otherwise, you should set a specific size here.
             appletSize = a.size();
             f.pack();
             f.resize(appletSize);

             // show the window
             f.show();
        
          } // end startApplet()
        
        
          // constructor needed to pass window title to class Frame
          public AppletFrame(String name)
          {
             // call java.awt.Frame(String) constructor
             super(name);
          }

          // needed to allow window close
          public boolean handleEvent(Event e)
          {
             // Window Destroy event
             if (e.id == Event.WINDOW_DESTROY)
             {
                // exit the program
                System.exit(0);
                return true;
             }
             
             // it's good form to let the super class look at any
             // unhandled events
             return super.handleEvent(e);

          } // end handleEvent()

      } // end class AppletFrame






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            Assignee:
            tballsunw Tom Ball (Inactive)
            Reporter:
            kasmithsunw Kevin Smith (Inactive)
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              Updated:
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