listdialogrunner.java

这是一个英文版的《Java程序设计与问题解决》现在好多大学都当成教材

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

/**
 * A 1.4 application that brings up a ListDialog.
 */
public class ListDialogRunner {
    static JFrame frame;
    static String[] names = {"Arlo", "Cosmo", "Elmo", "Hugo",
                             "Jethro", "Laszlo", "Milo", "Nemo",
                             "Otto", "Ringo", "Rocco", "Rollo"};

    public static void main(String[] args) {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);
        JDialog.setDefaultLookAndFeelDecorated(true);

        //Create and set up the window.
        frame = new JFrame("Name That Baby");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(createUI());

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static JPanel createUI() {
        //Create the labels.
        JLabel intro = new JLabel("The chosen name:");
        final JLabel name = new JLabel("Cosmo");
        intro.setLabelFor(name);

        //Use a wacky font if it exists. If not, this falls
        //back to the default font ("dialog") in 36 point, plain.
        name.setFont(new Font("Space Toaster", Font.PLAIN, 36));

        //Create the button.
        final JButton button = new JButton("Pick a new name...");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String selectedName = ListDialog.showDialog(
                                        frame,
                                        button,
                                        "Baby names ending in O:",
                                        "Name Chooser",
                                        names,
                                        name.getText());
                name.setText(selectedName);
            }
        });

        //Create the content pane and set up the layout.
        JPanel contentPane = new JPanel();
        contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
        contentPane.setBorder(BorderFactory.createEmptyBorder(20,20,10,20));
        intro.setAlignmentX(JComponent.CENTER_ALIGNMENT);
        name.setAlignmentX(JComponent.CENTER_ALIGNMENT);
        button.setAlignmentX(JComponent.CENTER_ALIGNMENT);

        //Add the labels to the content pane.
        contentPane.add(intro);
        contentPane.add(name);

        //Add a vertical spacer that also guarantees us a minimum width:
        contentPane.add(Box.createRigidArea(new Dimension(150,10)));

        //Add the button.
        contentPane.add(button);

        return contentPane;
    }
}