組合框

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;


public class ComboBoxFrame extends JFrame{
	private JLabel label;
	private JComboBox<String>faceCombo;
	private JPanel panel;
	private static int DEFAULT_SIZE = 20;
	
	public ComboBoxFrame() {
		label =  new JLabel("The quick brown fox jumps over the lazy dog");
		label.setFont(new Font("consolas",Font.ITALIC,DEFAULT_SIZE));
		this.add(label,BorderLayout.CENTER);
		
		faceCombo = new JComboBox<String>();
		faceCombo.addItem("Consolas");
		faceCombo.addItem("Georgia");
		faceCombo.addItem("Cambria");
		faceCombo.addItem("Calibri");
		
		faceCombo.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent e) {
				label.setFont(new Font(faceCombo.getItemAt(faceCombo.getSelectedIndex()),
						                 Font.ITALIC,DEFAULT_SIZE));
			}
		});
		
		panel = new JPanel();
		panel.add(faceCombo);
		this.setTitle("組合框");
		this.add(panel,BorderLayout.SOUTH);
		this.setLocation(300,400);
		this.pack();
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	public static void main(String[] args) {
		new ComboBoxFrame();
	}
}