How to bind JLabel with JCheckBox so when we unselect the checkbox both components are removed?

Question

I have a requirement in java swing. I have two checkBox (C++ and Java).

When we click on C++ on the right-side I want to create one JLabel with two JCheckBox controls.

Then when I deselect the checkBox then the components to their right-side should be removed.

public class CheckBoxWithJLabel {

    public static void main(String[] args) {
          JFrame f= new JFrame("CheckBox Example");   
          JPanel leftPanel = new JPanel();
          leftPanel.setBounds(40,80,200,200);  
          JPanel rightPanel = new JPanel();
          rightPanel.setBounds(280, 80, 100, 30);
          
          final ActionListener checkBoxActionListener = new ActionListener() {
                public void actionPerformed(ActionEvent actionEvent) {
                    JCheckBox checkBoxType = (JCheckBox) actionEvent.getSource();
                    if (checkBoxType.isSelected()) {
                        System.out.println();
                         final JLabel label = new JLabel("Sonu");
                            label.setBounds(10, 50, 100, 30);
                            label.setText(checkBoxType.getText());
                            rightPanel.add(label);
                            f.add(rightPanel);
                    }else {
                        System.out.println("Unchecked");
                    }
                }
            };
          
            JCheckBox checkbox1 = new JCheckBox("C++");    
            checkbox1.setBounds(150,100, 50,50);    
            JCheckBox checkbox2 = new JCheckBox("Java");    
            checkbox2.setBounds(150,150, 50,50);    
            leftPanel.add(checkbox1);
            leftPanel.add(checkbox2);
            checkbox1.addActionListener(checkBoxActionListener);
            checkbox2.addActionListener(checkBoxActionListener);
            f.add(leftPanel); 

            f.setSize(400,400);    
            f.setLayout(null);    
            f.setVisible(true);
    }
}

Can anyone help me to solve this problem?

Answer 1

For Java Swing components, you use setVisible(true/false) to show and hide components. Below, I've made some changes to your sample to demonstrate this:

    public static void main(String[] args) {
        JFrame f= new JFrame("CheckBox Example");
        JPanel leftPanel = new JPanel();
        leftPanel.setBounds(40,80,200,200);
        JPanel rightPanel = new JPanel();
        rightPanel.setBounds(280, 80, 100, 30);
        rightPanel.setLayout(new GridLayout(0,1));

        JPanel rhsCpp= new JPanel();
        rhsCpp.setLayout(new BorderLayout());
        rhsCpp.add(new JLabel("C++"), BorderLayout.NORTH);
        rhsCpp.add(new JCheckBox(""), BorderLayout.WEST);
        rhsCpp.add(new JCheckBox(""), BorderLayout.EAST);
        rightPanel.add(rhsCpp);

        JPanel rhsJava= new JPanel();
        rhsJava.setLayout(new BorderLayout());
        rhsJava.add(new JLabel("Java"), BorderLayout.NORTH);
        rhsJava.add(new JCheckBox(""), BorderLayout.WEST);
        rhsJava.add(new JCheckBox(""), BorderLayout.EAST);
        rightPanel.add(rhsJava);
        rightPanel.setSize(100, 100);

        final ActionListener checkBoxActionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                JCheckBox checkBoxType = (JCheckBox) actionEvent.getSource();
                if (checkBoxType.getText().equals("C++")) {
                    rhsCpp.setVisible(checkBoxType.isSelected());
                }else {
                    rhsJava.setVisible(checkBoxType.isSelected());
                }
                SwingUtilities.updateComponentTreeUI(f);
            }
        };

        JCheckBox checkbox1 = new JCheckBox("C++", true);
        checkbox1.setBounds(150,100, 50,50);
        JCheckBox checkbox2 = new JCheckBox("Java", true);
        checkbox2.setBounds(150,150, 50,50);
        leftPanel.add(checkbox1);
        leftPanel.add(checkbox2);
        checkbox1.addActionListener(checkBoxActionListener);
        checkbox2.addActionListener(checkBoxActionListener);
        f.add(leftPanel);
        f.add(rightPanel);


        f.setSize(400,400);
        f.setLayout(null);
        f.setVisible(true);

    }