I am having trouble with my code. What i'm trying to do is: 1. Create a Check Box, make it visible 2. When Check Box is selected display Combo Box, which will have few items for example ("1","2") 3. When 1 is selected from Combo Box then make 1 Text Field visible 4. When 2 is selected from Combo Box then make 2 Text Field's visible

What I am able to do is when Check Box is clicked, it displays the Combo Box with the items. I am not able provide functionality to the items in the Combo Box, such as when Item1 is clicked then make 1 Text Field visible. Please help needed.

My Code:

public void replacement_used(){

    no_of_part_used_label.setVisible(false);
    no_part_used_list.setVisible(false);
    part_no_one_label.setVisible(false);
    part_no_one_field.setVisible(false);
    part_no_two_label.setVisible(false);
    part_no_two_field.setVisible(false);
    part_no_three_label.setVisible(false);
    part_no_three_field.setVisible(false);
    part_no_four_label.setVisible(false);
    part_no_four_field.setVisible(false);
    part_no_five_label.setVisible(false);
    part_no_five_field.setVisible(false);

    HandlerClass handler = new HandlerClass();
    replacement_part_check_box.addItemListener(handler);

}

private class HandlerClass implements ItemListener{

    public void itemStateChanged(ItemEvent event){

        if (replacement_part_check_box.isSelected()){                
            no_of_part_used_label.setVisible(true);
            no_part_used_list.setVisible(true);  

        }

        x();
    }

}

public void x(){

    System.out.println("Start of x fucntion");

    if( no_part_used_list.getSelectedItem().equals("1") ){
        System.out.println("It is 1");
        part_no_one_label.setVisible(true);
        part_no_one_field.setVisible(true);

    }


}