import javax.swing.*; import javax.swing.border.*; import javax.swing.table.*;import java.awt.*; import java.awt.event.*;  import java.util.Iterator;import java.util.List; import CLIPSJNI.*;/* TBD module qualifier with find-all-facts */class WineDemo implements ActionListener  {     DefaultTableModel wineList;     JComboBox preferredColor;    JComboBox preferredBody;    JComboBox preferredSweetness;    JComboBox mainCourse;    JComboBox sauce;    JComboBox flavor;       JLabel jlab;     String preferredColorChoices[] = { "Don't Care", "Red", "White" };    String preferredBodyChoices[] = { "Don't Care", "Light", "Medium", "Full" };    String preferredSweetnessChoices[] = { "Don't Care", "Dry", "Medium", "Sweet" };       String mainCourseChoices[] = { "Don't Know", "Beef", "Pork", "Lamb", "Turkey", "Chicken", "Duck", "Fish", "Other" };   String sauceChoices[] = { "Don't Know", "None", "Spicy", "Sweet", "Cream", "Other" };   String flavorChoices[] = { "Don't Know", "Delicate", "Average", "Strong" };   Environment clips;   class WeightCellRenderer extends JProgressBar implements TableCellRenderer      {      public WeightCellRenderer()         {         super(JProgressBar.HORIZONTAL,0,100);         setStringPainted(false);        }        public Component getTableCellRendererComponent(        JTable table,         Object value,        boolean isSelected,         boolean hasFocus,         int row,         int column)         {          setValue(((Number) value).intValue());         return WeightCellRenderer.this;         }     }         WineDemo()     {        /*================================*/      /* Create a new JFrame container. */      /*================================*/           JFrame jfrm = new JFrame("Wine Demo");         /*=============================*/      /* Specify FlowLayout manager. */      /*=============================*/              jfrm.getContentPane().setLayout(new FlowLayout());         /*=================================*/      /* Give the frame an initial size. */      /*=================================*/           jfrm.setSize(480,390);          /*=============================================================*/      /* Terminate the program when the user closes the application. */      /*=============================================================*/           jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         /*===============================*/      /* Create the preferences panel. */      /*===============================*/            JPanel preferencesPanel = new JPanel();       GridLayout theLayout = new GridLayout(3,2);      preferencesPanel.setLayout(theLayout);         preferencesPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(),                                                                 "Preferences",                                                                 TitledBorder.CENTER,                                                                 TitledBorder.ABOVE_TOP));       preferencesPanel.add(new JLabel("Color:"));      preferredColor = new JComboBox(preferredColorChoices);       preferencesPanel.add(preferredColor);      preferredColor.addActionListener(this);           preferencesPanel.add(new JLabel("Body:"));      preferredBody = new JComboBox(preferredBodyChoices);       preferencesPanel.add(preferredBody);      preferredBody.addActionListener(this);      preferencesPanel.add(new JLabel("Sweetness:"));      preferredSweetness = new JComboBox(preferredSweetnessChoices);       preferencesPanel.add(preferredSweetness);      preferredSweetness.addActionListener(this);      /*========================*/      /* Create the meal panel. */      /*========================*/           JPanel mealPanel = new JPanel();       theLayout = new GridLayout(3,2);      mealPanel.setLayout(theLayout);         mealPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(),                                                                 "Meal",                                                                 TitledBorder.CENTER,                                                                 TitledBorder.ABOVE_TOP));       mealPanel.add(new JLabel("Main Course:"));      mainCourse = new JComboBox(mainCourseChoices);       mealPanel.add(mainCourse);      mainCourse.addActionListener(this);          mealPanel.add(new JLabel("Sauce:"));      sauce = new JComboBox(sauceChoices);       mealPanel.add(sauce);      sauce.addActionListener(this);      mealPanel.add(new JLabel("Flavor:"));      flavor = new JComboBox(flavorChoices);       mealPanel.add(flavor);      flavor.addActionListener(this);            /*==================================*/      /* Create the recommendation panel. */      /*==================================*/      wineList = new DefaultTableModel();      wineList.setDataVector(new Object[][] { },                             new Object[] { "Wine", "Recommendation Weight"});               JTable table =          new JTable(wineList)           {            public boolean isCellEditable(int rowIndex,int vColIndex)               { return false; }           };      table.setCellSelectionEnabled(false);       WeightCellRenderer renderer = this.new WeightCellRenderer();       renderer.setBackground(table.getBackground());      table.getColumnModel().getColumn(1).setCellRenderer(renderer);      JScrollPane pane = new JScrollPane(table);          table.setPreferredScrollableViewportSize(new Dimension(450,210));               /*==================================================*/      /* Add the two ComboBox panels to the content pane. */      /*==================================================*/            jfrm.getContentPane().add(preferencesPanel);       jfrm.getContentPane().add(mealPanel);       jfrm.getContentPane().add(pane);       /*===================================================*/      /* Initially select the first item in each ComboBox. */      /*===================================================*/             preferredColor.setSelectedIndex(0);       preferredBody.setSelectedIndex(0);       preferredSweetness.setSelectedIndex(0);       mainCourse.setSelectedIndex(0);      sauce.setSelectedIndex(0);      flavor.setSelectedIndex(0);      /*========================*/      /* Load the wine program. */      /*========================*/            clips = new Environment();            clips.load("winedemo.clp");            runWine();             /*====================*/      /* Display the frame. */      /*====================*/            jfrm.setVisible(true);       }       /*########################*/   /* ActionListener Methods */   /*########################*/      /*******************/   /* actionPerformed */   /*******************/     public void actionPerformed(     ActionEvent ae)      {       if (clips == null) return;            runWine();     }        /*******************/   /* runWine */   /*******************/     private void runWine()      {       String item;      clips.reset();                        item = (String) preferredColor.getSelectedItem();      if (item.equals("Red"))           { clips.assertString("(attribute (name preferred-color) (value red))"); }      else if (item.equals("White"))           { clips.assertString("(attribute (name preferred-color) (value white))"); }      else        { clips.assertString("(attribute (name preferred-color) (value unknown))"); }      item = (String) preferredBody.getSelectedItem();      if (item.equals("Light"))           { clips.assertString("(attribute (name preferred-body) (value light))"); }      else if (item.equals("Medium"))           { clips.assertString("(attribute (name preferred-body) (value medium))"); }      else if (item.equals("Full"))           { clips.assertString("(attribute (name preferred-body) (value full))"); }      else        { clips.assertString("(attribute (name preferred-body) (value unknown))"); }       item = (String) preferredSweetness.getSelectedItem();      if (item.equals("Dry"))           { clips.assertString("(attribute (name preferred-sweetness) (value dry))"); }      else if (item.equals("Medium"))           { clips.assertString("(attribute (name preferred-sweetness) (value medium))"); }      else if (item.equals("Sweet"))           { clips.assertString("(attribute (name preferred-sweetness) (value sweet))"); }      else        { clips.assertString("(attribute (name preferred-sweetness) (value unknown))"); }      item = (String) mainCourse.getSelectedItem();      if (item.equals("Beef") ||          item.equals("Pork") ||          item.equals("Lamb"))        {          clips.assertString("(attribute (name main-component) (value meat))");          clips.assertString("(attribute (name has-turkey) (value no))");        }      else if (item.equals("Turkey"))           {          clips.assertString("(attribute (name main-component) (value poultry))");          clips.assertString("(attribute (name has-turkey) (value yes))");        }      else if (item.equals("Chicken") ||               item.equals("Duck"))           {          clips.assertString("(attribute (name main-component) (value poultry))");          clips.assertString("(attribute (name has-turkey) (value no))");        }      else if (item.equals("Fish"))           {          clips.assertString("(attribute (name main-component) (value fish))");          clips.assertString("(attribute (name has-turkey) (value no))");        }      else if (item.equals("Other"))           {          clips.assertString("(attribute (name main-component) (value unknown))");          clips.assertString("(attribute (name has-turkey) (value no))");        }      else        {          clips.assertString("(attribute (name main-component) (value unknown))");          clips.assertString("(attribute (name has-turkey) (value unknown))");        }      item = (String) sauce.getSelectedItem();      if (item.equals("None"))           { clips.assertString("(attribute (name has-sauce) (value no))"); }      else if (item.equals("Spicy"))           {          clips.assertString("(attribute (name has-sauce) (value yes))");         clips.assertString("(attribute (name sauce) (value spicy))");        }      else if (item.equals("Sweet"))           {          clips.assertString("(attribute (name has-sauce) (value yes))");         clips.assertString("(attribute (name sauce) (value sweet))");        }      else if (item.equals("Cream"))           {          clips.assertString("(attribute (name has-sauce) (value yes))");         clips.assertString("(attribute (name sauce) (value cream))");        }      else if (item.equals("Other"))           {          clips.assertString("(attribute (name has-sauce) (value yes))");         clips.assertString("(attribute (name sauce) (value unknown))");        }      else        {          clips.assertString("(attribute (name has-sauce) (value unknown))");         clips.assertString("(attribute (name sauce) (value unknown))");        }      item = (String) flavor.getSelectedItem();      if (item.equals("Delicate"))           { clips.assertString("(attribute (name tastiness) (value delicate))"); }      else if (item.equals("Average"))           { clips.assertString("(attribute (name tastiness) (value average))"); }      else if (item.equals("Strong"))           { clips.assertString("(attribute (name tastiness) (value strong))"); }      else        { clips.assertString("(attribute (name tastiness) (value unknown))"); }            clips.run();            String evalStr = "(WINES::get-wine-list)";                                                   MultifieldValue pv = (MultifieldValue) clips.eval(evalStr);                  List theList = pv.listValue();            wineList.setRowCount(0);            for (Iterator itr = theList.iterator(); itr.hasNext(); )         {         FactAddressValue fv = (FactAddressValue) itr.next();         int certainty = ((FloatValue) fv.getFactSlot("certainty")).intValue();                   String wineName = ((StringValue) fv.getFactSlot("value")).stringValue();                           wineList.addRow(new Object[] { wineName, new Integer(certainty) });        }           }        public static void main(String args[])     {        // Create the frame on the event dispatching thread.        SwingUtilities.invokeLater(        new Runnable()           {             public void run() { new WineDemo(); }            });        }    }