import javax.swing.*;
 
import java.awt.event.*;
public class fruta extends JFrame implements ItemListener{
 
	ButtonGroup  buttonGroup = new ButtonGroup();
	JCheckBox casilla1 = new JCheckBox ("Manzana", false);
	JCheckBox casilla2 = new JCheckBox ("Pera", false);
	JCheckBox casilla3 = new JCheckBox ("Uva", false);
 
 
	JPanel mipanel = new JPanel();
	 JComboBox combo1;
	 String[] ls = { "Manzana","Pera","Uva"};
	public void ventana(){
		combo1= new JComboBox(ls);
		buttonGroup.add(casilla1);
		buttonGroup.add(casilla2);
		buttonGroup.add(casilla3);
		mipanel.add(casilla1);
		mipanel.add(casilla2);
		mipanel.add(casilla3);
		mipanel.add(combo1);
		add(mipanel);
		setTitle("Frutas");
		setVisible(true);
		setSize(200,150);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		combo1.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
 
			}
		});
		casilla1.setSelected(false);
		casilla1.addItemListener(this);
		casilla2.addItemListener(this);
		casilla3.addItemListener(this);
	}
	public static void main(String[] args) {
		fruta obj = new fruta();
		obj.ventana ();
 
	}
 
	@Override
	public void itemStateChanged(ItemEvent arg0) { 
		AbstractButton  abstractButton =(AbstractButton)arg0.getSource();
		combo1.setSelectedItem(abstractButton.getText());	
	}
}