// Add fields to the screen.

    public void populateMainScreen(MainScreen screen) {

       int index = _data.getSelected();

       String[] choices = {“High”, “Low”, “None”};

       _ocf = new ObjectChoiceField(“Security: “, choices, index);

       screen.add(_ocf);

       }

   

    // Save the data.

    public void save() {

       _data.setSelected(_ocf.getSelectedIndex());

       _data.commit();

       }

   

    // Retrieve the data. Used by other applications to access options data.

    public OptionsDemoData getData() {

       return _data;

       }

   

    // Inner class to store selected option values.

    public static final class OptionsDemoData implements Persistable {

       private static final long ID = 0x6af0b5eb44dc5164L;

       private int _selectedOption;

       private OptionsDemoData() {       

       }

      

       public int getSelected() {

           return _selectedOption;

           }

       public void setSelected(int index) {

           _selectedOption = index;

           }

      

       public void commit() {

           PersistentObject.commit(this);

           }

      

       private static OptionsDemoData load() {

           PersistentObject persist = PersistentStore.getPersistentObject(

                  OptionsDemoData.ID );

           OptionsDemoData contents = (OptionsDemoData)persist.getContents();

           synchronized( persist ) {

              if( contents == null ) {

                  contents = new OptionsDemoData();

                  persist.setContents( contents );

                  persist.commit();

                  }

              }

           return contents;

           }

       }

  }

作者:Confach 发表于2006-04-28 22:18 pm
版权信息:可以任意转载, 转载时请务必以超链接形式标明文章原始出处 和作者信息.
http://www.cnblogs.com/confach/articles/387946.html