How to hide and display JCombobox with a JCheckBox in Java?

To toggle visibility with JCheckBox, use isVisible() method:

JCheckBox toggleVisibility = new JCheckBox("Hide/Show");
toggleVisibility.setSelected(comboBox.isVisible());
toggleVisibility.addItemListener(e -> {
   comboBox.setVisible(e.getStateChange() == ItemEvent.SELECTED);
});

The following is an example to hide and display JCombobox with a JCheckBox in Java:

Example

import java.awt.BorderLayout;
import java.awt.event.ItemEvent;
import javax.swing.*;
public class SwingDemo {
   JFrame frame;
   SwingDemo(){
      frame = new JFrame("ComboBox");
      String Sports[]={"Select","Tennis","Cricket","Football"};
      JComboBox comboBox = new JComboBox(Sports);
      comboBox.setBounds(50, 50,90,20);
      frame.add(comboBox, BorderLayout.CENTER);
      JCheckBox toggleVisibility = new JCheckBox("Hide/Show");
      toggleVisibility.setSelected(comboBox.isVisible());
      toggleVisibility.addItemListener(e -> {
         comboBox.setVisible(e.getStateChange() == ItemEvent.SELECTED);
      });
      frame.add(toggleVisibility, BorderLayout.SOUTH);
      //frame.setLayout(null);
      frame.setSize(600,100);
      frame.setVisible(true);
   }
   public static void main(String[] args) {
      new SwingDemo();
   }
}

The output is as follows. By default, the following JComboBox is visible:

Output

Now, uncheck on “Hide/Show” above to hide the JComboBox. On uncheck, the JComboBox will hide as shown below: