import java.awt.event.*;
import javax.swing.*;
import java.awt.Font;
import java.awt.Container;
import java.awt.BorderLayout;

public class AnonComboBoxApp
    extends JFrame
{
    public static void main(String[] args)
    {
        JFrame cframe = new AnonComboBoxApp();
        cframe.show();
    }
    
    public AnonComboBoxApp()
    {
        setTitle("Ejemplo de ComboBox");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(XSIZE, YSIZE);

        AnonComboPanel panel= new AnonComboPanel();
        Container contentPane= getContentPane();
        contentPane.add(panel, "Center" );
    }
    public static final int XSIZE= 600;
    public static final int YSIZE= 400;
}

class AnonComboPanel
    extends JPanel //implementa a ActionListener
{
    public AnonComboPanel()
    {
        String[][] fontOptions=
        {
            {"Monospaced", "Serif", "SansSerif"},
            {"NORMAL", "NEGRITA", "CURSIVA"},
            {"10", "12", "14", "18", "24", "36"}
        };
        
        setLayout( new BorderLayout() );
        chFamily= new JComboBox(fontOptions[0]);
        chStyle= new JComboBox(fontOptions[1]);
        chSize= new JComboBox(fontOptions[2]);
        showFont= new JLabel();
        showFont.setHorizontalAlignment( SwingConstants.CENTER );
        showFont.setFont(new Font(curFamily, styleIndex(curStyle), curSize));
        showFont.setText(curFamily + " " + curStyle + " " + curSize);
        
        JPanel comboPanel = new JPanel();
        comboPanel.add(chFamily);
        comboPanel.add(chStyle);
        comboPanel.add(chSize);
        add( comboPanel, "North" );
        add( showFont, "Center" );
        //chFamily.addActionListener(this);
        chFamily.addActionListener( new ActionListener()
            {
                public void actionPerformed( ActionEvent e )
                {
                    curFamily= (String) chFamily.getSelectedItem();
                    showFont.setFont( new Font( curFamily, styleIndex(curStyle), curSize) );
                    showFont.setText(curFamily + " " + curStyle + " " + curSize);
                }
            }
        );
        //chStyle.addActionListener(this);
        chStyle.addActionListener( new ActionListener()
            {
                public void actionPerformed( ActionEvent e )
                {
                    curStyle= (String) chStyle.getSelectedItem();
                    showFont.setFont( new Font( curFamily, styleIndex(curStyle), curSize) );
                    showFont.setText(curFamily + " " + curStyle + " " + curSize);
                }
            }
        );
        //chSize.addActionListener(this);
        chSize.addActionListener( new ActionListener()
            {
                public void actionPerformed( ActionEvent e )
                {
                    curSize= Integer.parseInt( (String) chSize.getSelectedItem());
                    showFont.setFont( new Font( curFamily, styleIndex(curStyle), curSize) );
                    showFont.setText(curFamily + " " + curStyle + " " + curSize);
                }
            }
        );

    }
    
    private void update()
    {
        showFont.setFont( new Font( curFamily, styleIndex(curStyle), curSize) );
        showFont.setText(curFamily + " " + curStyle + " " + curSize);
    }

    private String curFamily= "Monospaced";
    private String curStyle= "NORMAL";
    private int curSize= 10;
    private JLabel showFont;
    private JComboBox chFamily;
    private JComboBox chStyle;
    private JComboBox chSize;
    
    public int styleIndex(String s)
    {
        if (s.equals("NEGRITA"))
            return Font.BOLD;
        else if (s.equals("CURSIVA"))
            return Font.ITALIC;
        else
            return Font.PLAIN;
    }
}