private void availableFurnitureActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_availableFurnitureActionPerformed
   // TODO add your handling code here:
   try{
         categoryToSearch=jComboBox_Available.getSelectedItem().toString();
         ArrayList<String> furnitureNames;
         furnitureNames = new ArrayList<>();

      numberOfSelectedCategory = 0;

      int rowCount = jTable_Details.getRowCount();

      for (int i=0;i<rowCount;i++){

            category = (String) jTable_Details.getValueAt(i,1);
            if (category==null) break;

            if(category.equalsIgnoreCase(categoryToSearch)) {
               numberOfSelectedCategory ++;
               furnitureNames.add((String) jTable_Details.getValueAt(i,2));
            }

   }
      String show="";
   if(numberOfSelectedCategory==1){
         JOptionPane.showMessageDialog(rootPane, "There is"+" "+numberOfSelectedCategory+" "+categoryToSearch + ": "+furnitureNames.get(0));

   }
   else if(numberOfSelectedCategory==0){
         JOptionPane.showMessageDialog(rootPane, "There is no avilable furniture");
   }
   else{


         for(int i=0;i<furnitureNames.size();i++){

            if(i==0){
                     show+=furnitureNames.get(i);
            }

            else if(i==furnitureNames.size()-1){
               show+=" and "+furnitureNames.get(i);
            }

            else{
               show+=", "+furnitureNames.get(i);
            }
         }
         JOptionPane.showMessageDialog(rootPane,"There are " +numberOfSelectedCategory+" "+categoryToSearch+"S"+": "+ show);
   }
   }
   catch (Exception e) {
         System.err.format("Exception occurred trying to find number of available furniture");
         e.printStackTrace();

   }

1. Checkerboard Write a program Checkerboard.java that takes an...