列表组件

import javax.swing.*;
import java.awt.*;

/**
 * Created by End on 16/1/14.
 */
public class ComboBoxTest {
    public static void main (String args[]){
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new ComboBoxFrame();
                frame.setTitle("ComboBoxTest");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.jar.JarFile;

/**
 * Created by End on 16/1/14.
 */
public class ComboBoxFrame extends JFrame {
    private JComboBox<String> faceCombo ;
    private JLabel label;
    private static final int DEFAULT_SIZE = 24 ;

    public ComboBoxFrame(){
        label = new JLabel("I'm too said!");
        label.setFont(new Font("Serif",Font.PLAIN,DEFAULT_SIZE));
        add(label,BorderLayout.CENTER);

        faceCombo = new JComboBox<String>();
        faceCombo.addItem("Serif");
        faceCombo.addItem("SansSerif");
        faceCombo.addItem("Monospaced");
        faceCombo.addItem("Dialog");
        faceCombo.addItem("DialogInput");

        faceCombo.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                label.setFont(new Font(faceCombo.getItemAt(faceCombo.getSelectedIndex()),Font.PLAIN,DEFAULT_SIZE));
            }
        });
        JPanel comboPanel = new JPanel();
        comboPanel.add(faceCombo);
        add(comboPanel,BorderLayout.SOUTH);
        pack();

    }
}