JTree Examples in Java swing Netbeans

This JTree example used to select the course name from the JTree relavent  select course name and price will be displayed on the textfield.i shown the screen shot image below.

First Step we have to create the DefaultTreeModel model;   i have written the codes below. i will be able see it.

DefaultTreeModel model;
    public view() 
     {
        initComponents();
        Load();
    }
    DefaultMutableTreeNode courses = new DefaultMutableTreeNode("Courses"); 
    public void Load()
    {
        DefaultMutableTreeNode designNode = new DefaultMutableTreeNode("Graphic Designing");
        designNode.add(new DefaultMutableTreeNode("Photoshop"));
        designNode.add(new DefaultMutableTreeNode("CorelDraw"));
        designNode.add(new DefaultMutableTreeNode("InDesign"));
        designNode.add(new DefaultMutableTreeNode("illustrator"));
        DefaultMutableTreeNode programmingNode = new DefaultMutableTreeNode("Programming");
        programmingNode.add(new DefaultMutableTreeNode("C#"));
        programmingNode.add(new DefaultMutableTreeNode("Java"));
        programmingNode.add(new DefaultMutableTreeNode("Asp.Net"));
        programmingNode.add(new DefaultMutableTreeNode("Python"));
        programmingNode.add(new DefaultMutableTreeNode("Php")); 
        courses.add(programmingNode);
        courses.add(designNode); 
        model = (DefaultTreeModel)jTree1.getModel();
        model.setRoot(courses);
        jTree1.setModel(model);

    }

select the JTree Right Click->Events->Mouse->mouseClicked i attached the screen shot image below.

Paste the code inside the Event

private void jTree1MouseClicked(java.awt.event.MouseEvent evt) 
{                                    
  
        courses = (DefaultMutableTreeNode)jTree1.getSelectionPath().getLastPathComponent();
        txtnode.setText(courses.getUserObject().toString());
        
         String select =  courses.getUserObject().toString();
         
         if(select.equals("Photoshop"))
         {
             txtfee.setText("5000");
         }
         else if(select.equals("CorelDraw"))
         {
              txtfee.setText("6000");
         }
          else if(select.equals("InDesign"))
         {
              txtfee.setText("7000");
         }
         else if(select.equals("illustrator"))
         {
              txtfee.setText("9000");
         }
         
         else if(select.equals("C#"))
         {
             txtfee.setText("10000");
         }
         else if(select.equals("Java"))
         {
              txtfee.setText("15000");
         }
          else if(select.equals("Asp.Net"))
         {
              txtfee.setText("17000");
         }
         else if(select.equals("Python"))
         {
              txtfee.setText("19000");
         }
         
          else if(select.equals("Php"))
         {
              txtfee.setText("20000");
         }
 
}

i have attached the video link below. which will do this tutorials step by step.