package com.robert;import javax.swing.*;import java.awt.*;/** * Created by IntelliJ IDEA. * User: Administrator * Date: 11-11-12 * Time: 下午8:53 * To change this template use File | Settings | File Templates. */public class LongListTest {    public static void main(String[] args)    {        EventQueue.invokeLater(new Runnable() {            public void run() {                JFrame frame = new LongListTestFrame();                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);                frame.setVisible(true);            }        });    }}

package com.robert;import javax.swing.*;import javax.swing.event.ListSelectionEvent;import javax.swing.event.ListSelectionListener;import javax.xml.soap.Text;import java.awt.*;/** * Created by IntelliJ IDEA. * User: Administrator * Date: 11-11-12 * Time: 下午8:55 * To change this template use File | Settings | File Templates. */public class LongListTestFrame extends JFrame{    private static final int DEFAULT_WIDTH = 400;    private static final int DEFAULT_HEIGHT = 300;    private JList wordList;    private JLabel label;    private String prefix = "The quick brown ";    private String suffix = " jump over the lazy dog.";    public LongListTestFrame()    {        setTitle("LongListTest");        setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);        wordList = new JList(new WordListModel(3));        wordList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);        wordList.setPrototypeCellValue("www");        JScrollPane scrollPane = new JScrollPane(wordList);        JPanel p = new JPanel();        p.add(scrollPane);        wordList.addListSelectionListener(new ListSelectionListener() {            public void valueChanged(ListSelectionEvent e) {                StringBuilder word = (StringBuilder)wordList.getSelectedValue();                setSubject(word.toString());            }        });        Container contentPane = getContentPane();        contentPane.add(p,BorderLayout.NORTH);        label = new JLabel(prefix + suffix);        contentPane.add(label, BorderLayout.CENTER);        setSubject("FOX");    }    public void setSubject(String word)    {        StringBuilder text = new StringBuilder(prefix);        text.append(word);        text.append(suffix);        label.setText(text.toString());    }}

package com.robert;import com.sun.org.apache.bcel.internal.generic.LASTORE;import javax.swing.*;/** * Created by IntelliJ IDEA. * User: Administrator * Date: 11-11-12 * Time: 下午9:03 * To change this template use File | Settings | File Templates. */public class WordListModel extends AbstractListModel {    private int length;    public static final char FIRST = 'a';    public static final char LAST = 'z';    public WordListModel(int n)    {        length = n;    }    public int getSize()    {        return (int)Math.pow(LAST - FIRST + 1,length);    }    public Object getElementAt(int n)    {        StringBuilder r = new StringBuilder();        for(int i = 0; i < length; i++)        {            char c = (char)(FIRST + n % (LAST - FIRST + 1));            r.insert(0, c);            n = n / (LAST - FIRST + 1);        }        return r;    }}