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    <p>If I have understood your question then I think you want to write a separate <code>ActionListener</code> class and perform action there which will enable or disable the <code>JCheckBox</code> in the UI-class. The below code shows that. Pass your checkbox reference to that <code>PerformAction</code> class and make it enabled or disabled by clicking on the button.</p> <pre><code>import java.awt.EventQueue; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class MainClass { MainClass() { JFrame jfrm = new JFrame("JTable Demo"); jfrm.setLayout(new FlowLayout()); jfrm.setSize(460, 180); jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JCheckBox check = null; // Get the Panel from the subclass; JPanel panel = new CheckBox().getCheckBoxPanel(); // From the compoenents present in the panel get the CheckBox compoenent. for(int i = 0; i &lt; panel.getComponentCount(); i++) { if(panel.getComponent(i) instanceof JCheckBox) { check = (JCheckBox) panel.getComponent(i); } } JButton button = new JButton("Click"); // Pass the CheckBox Compoenent to the ActionListener. button.addActionListener(new PerformAction(check)); jfrm.add(button); jfrm.add(panel); jfrm.setVisible(true); } public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new MainClass(); } }); } } class PerformAction implements ActionListener { JCheckBox check = null; public PerformAction(JCheckBox checkBox) { check = checkBox; } @Override public void actionPerformed(ActionEvent e) { boolean checkStatus = check.isSelected(); if(checkStatus == true) { check.setEnabled(false); check.setSelected(false); } else { check.setEnabled(true); check.setSelected(true); } } } class CheckBox { public JPanel getCheckBoxPanel() { JPanel checkPanel = new JPanel(); JCheckBox check = new JCheckBox(); checkPanel.add(new JLabel("CheckBox")); checkPanel.add(check); return checkPanel; } } </code></pre>
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    1. COi am using two different classes. The subpanel class returns a panel to the mainpanel class. This panel contains a checkbox and label whose properties i am trying to change when i click a button in mainpanel class.
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    2. COLook at my Updated code. This will get the Panel and get the components from the panel and then then pass it to the ActionPerformed class. Hope this helps .. ;-)
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    3. CO@RohanKandwal: Don't neglect to up-vote answers you found helpful.
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