Split ItemListener Into Two Class

Feb 24, 2014

My problem is with ItemListener I'm not sure why it is not working. Well I'm trying to split the ItemListener into two class. In the main class I have this :

final JCheckBox whole_C_CheckBox = new JCheckBox("Whole");
whole_C_CheckBox.addItemListener(new CheckBox(whole_C_QTextField, whole_C_WTextField, whole_C_PTextField));
whole_C_CheckBox.setVerticalAlignment(SwingConstants.BOTTOM);
whole_C_CheckBox.setHorizontalAlignment(SwingConstants.LEFT);
whole_C_CheckBox.setBounds(12, 66, 113, 25);
chikenPanel.add(whole_C_CheckBox);

In the other class I have
 
public class CheckBox implements ItemListener{ 
private JTextField q;
private JTextField p;
private JTextField w;
private JCheckBox whole_C_CheckBox;
public CheckBox(JTextField whole_C_QTextField, JTextField whole_C_WTextField, JTextField whole_C_PTextField) {

[Code] ....

will when I try to run the program its working.However, when I click on the Check Box for (whole_C_CheckBox ) it give an error I don't know what is wrong with my code.

Note: in the main class all these whole_C_QTextField, whole_C_WTextField, whole_C_PTextField has been set in default to (0, 0.00, 0.00), so I'm trying when I click on Check Box for (whole_C_CheckBox ) it will set them to nothing, and if I unchecked them again they will return to their default (0, 0.00, 0.00).

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