import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JCheckBox;

public class CheckBoxFrame extends JFrame{

	private JTextField textField;
	private JCheckBox boldJCheckBox;
	private JCheckBox italicJCheckBox;

	public CheckBoxFrame(){

		super("Testando CheckBox");
		setLayout(new FlowLayout());

		textField = new JTextField("Assista a mudança de estilo de fonte", 20);
		textField.setFont(new Font("Serif", Font.PLAIN, 14));
                add(textField);

		boldJCheckBox = new JCheckBox("Negrito");
		italicJCheckBox = new JCheckBox("Itálico");
		add(boldJCheckBox);
		add(italicJCheckBox);

		CheckBoxHandler handler = new CheckBoxHandler();
		boldJCheckBox.addItemListener(handler);
		italicJCheckBox.addItemListener(handler);

	}

	private class CheckBoxHandler implements ItemListener{

		public void itemStateChanged(ItemEvent event){

			Font font = null;
			if(boldJCheckBox.isSelected() && italicJCheckBox.isSelected()){

				font = new Font("Serif", Font.BOLD + Font.ITALIC,14);

			}else if(boldJCheckBox.isSelected()){

					font = new Font("Serif", Font.BOLD,14);

				}else if(italicJCheckBox.isSelected()){

					font = new Font("Serif", Font.ITALIC,14);

				}else{

					font = new Font("Serif", Font.PLAIN, 14);
				}

			textField.setFont(font);

		}
	}
}