testdefaultlistmodel.java

疯狂Java讲义_源码(含Java设计模式CHM

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

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class TestDefaultListModel
{
	private JFrame mainWin = new JFrame("测试DefaultListModel");
	//定义一个JList对象
	private JList bookList;
	//定义一个DefaultListModel对象
	private DefaultListModel bookModel = new DefaultListModel();
	private JTextField bookName = new JTextField(20);
	private JButton removeBn = new JButton("删除选中图书") ;
	private JButton addBn = new JButton("添加指定图书");

	public void init()
	{
		//向bookModel中添加元素
		bookModel.addElement("Spring2.0宝典");
		bookModel.addElement("轻量级J2EE企业应用实战");
		bookModel.addElement("基于J2EE的Ajax宝典");
		bookModel.addElement("Struts2权威指南");
		bookModel.addElement("ROR敏捷开发最佳实践");
		//根据DefaultListModel对象创建一个JList对象
		bookList = new JList(bookModel);
		//设置最大可视高度
		bookList.setVisibleRowCount(4); 
		//只能单选
		bookList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

		//为添加按钮添加事件监听器
		addBn.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				//当bookName文本框的内容不为空。
				if (!bookName.getText().trim().equals(""))
				{
					//向bookModel中添加一个元素，系统自动会向JList中添加对应的列表项
					bookModel.addElement(bookName.getText());
				}
			}
		});
		//为删除按钮添加事件监听器
		removeBn.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				//如果用户已经选中的一项
				if (bookList.getSelectedIndex() >= 0)
				{
					//从bookModel中删除指定索引处的元素，系统自动会删除JList对应的列表项
					bookModel.removeElementAt(bookList.getSelectedIndex());
				}

			}
		});

		JPanel p = new JPanel();
		p.add(bookName);
		p.add(addBn);
		p.add(removeBn);
		//添加bookList组件
		mainWin.add(new JScrollPane(bookList));
		//将p面板添加到窗口中
		mainWin.add(p , BorderLayout.SOUTH);

		mainWin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		mainWin.pack();
		mainWin.setVisible(true);

	}

	public static void main(String[] args) 
	{
		new TestDefaultListModel().init();
	}
}