showlist.java

源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例子程序

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

public class ShowList extends JxFrame implements ActionListener {
    String names[]= {"Dave Kelch", "Charlie Rook", 
        "Adam Gehr", "Edward So", "Barry Manilow"};
    SortedModel ldata;
    JButton Next;
    int index;

    public ShowList() {
        super("List of names");
        JPanel jp = new JPanel();
        getContentPane().add(jp);
        jp.setLayout(new BorderLayout());
                        
        //create list using SOrted data model
        ldata = new SortedModel();
        JList nList = new JList(ldata);
        JScrollPane sc = new JScrollPane();

        sc.getViewport().setView(nList);
        jp.add ("Center", sc);
        
        //add in Next button
        JButton Next = new JButton("Next");
        JPanel bot = new JPanel();
        jp.add("South", bot);
        bot.add(Next);
        Next.addActionListener (this);
        setSize(new Dimension(200,175));
        setVisible(true);
        index = 0;
        
    }
    public void actionPerformed(ActionEvent evt) {
        if(index < names.length)
            ldata.addElement (names[index++]);

    }
    static public void main(String argv[]) {
        new ShowList();
    }
}