java列表项的增加与删除.doc

25列表项的增加与删除.docpackage com.swing01;import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.Font;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.DefaultListModel;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JList;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.UIManager;import javax.swing.border.EmptyBorder;public class DynamicList extends JFrame private static final long serialVersionUID = 890359141688419648L; private JPanel contentPane; private JList list; /列表模型 private DefaultListModel model = new DefaultListModel(); public static void main(String args) try /皮肤 UIManager.setLookAndFeel(com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel); catch (Throwable e) e.printStackTrace(); EventQueue.invokeLater(new Runnable() public void run() try DynamicList frame = new DynamicList(); frame.setVisible(true); catch (Exception e) e.printStackTrace(); ); /* * Create the frame. */ public DynamicList() /标题 setTitle(列表项的增加与删除); /退出时关闭虚拟机 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); /位置及大小 setBounds(100, 100, 450, 300); /面板容器 contentPane = new JPanel(); /面板边框 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5); /面板布局格式 contentPane.setLayout(new BorderLayout(0, 0); /将面板容器添加到窗体中 setContentPane(contentPane); /面板 JPanel panel = new JPanel(); /将面板添加到容器中 contentPane.add(panel, BorderLayout.SOUTH); /接钮 JButton addButton = new JButton(增加); addButton.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) do_addButton_actionPerformed(e); ); /按钮字体 addButton.setFont(new Font(微软雅黑, Font.PLAIN, 16); /将面板添加按钮 panel.add(addButton); /按钮 JButton deleteButton = new JButton(删除); deleteButton.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) do_deleteButton_actionPerformed(e); ); /按钮设置字体 deleteButton.setFont(new Font(微软雅黑, Font.PLAIN, 16); /面板添加按钮 panel.add(deleteButton); /滚动条 JScrollPane scrollPane = new JScrollPane(); /容器面板添加滚动条 contentPane.add(scrollPane, BorderLayout.CENTER); /列表 list = new JList(); /列表字体 list.setFont(new Font(微软雅黑, Font.PLAIN, 16); /滚动条添加列表 scrollPane.setViewportView(list); /给模型添加内容 model.addElement(Java从入门到精通（第2版）); model.addElement(PHP从入门到精通（第2版）); model.addElement(Visual Basic从入门到精通（第2版）); model.addElement(Visual C+从入门到精通（第2版）); model.addElement(Java编程词典); model.addElement(细说Java); model.addElement(视频学Java); /列表添加内容 /设置表示列表内容或“值”的模型，并在通知 PropertyChangeListener 之后清除列表选择 list.setModel(model); protected void do_addButton_actionPerformed(ActionEvent e) /提示输入框 String text = JOptionPane.showInputDialog(添加元素); if (text != null) & (!text.trim().isEmpty() model.addElement(text.trim(); else return; protected void do