我要用到javax.swing.tree 控件,请问谁那里有现成的例子?谢谢了.

Question

http://java.sun.com/docs/books/tutorial/uiswing/components/example-swing/index.html#FileChooserDemo2

Answer 1

这个是wrox出的《java编程指南》上的例子，可能不合你的需要，
wrox还出了一本《java专业编程指南》，里面讲的树的例子也不少，你可以去下载源码看看。
www.wrox.com
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import javax.swing.tree.*;
import javax.swing.table.*;
import java.sql.*;class DatabaseBrowse extends JFrame implements ActionListener, TreeSelectionListener
{
  public static void main(String[] args)
  {
     DatabaseBrowse theApp = new DatabaseBrowse();     // Create application object
  }  public DatabaseBrowse()
  {
    super("Database Browser");
    
    setBounds(0, 0, 400, 300);
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    addWindowListener(new WindowHandler());    // Create labels for input fields
    JLabel dbURLLabel  = new JLabel( "Database URL: ");
    dbURLLabel.setDisplayedMnemonic('D');          // Set accelerator
    dbURLLabel.setLabelFor(database);              // Connect label to field
    database.setFocusAccelerator('D');             // Identify accelerator to field    JLabel userIDLabel = new JLabel( "User ID:", JLabel.RIGHT);
    userIDLabel.setDisplayedMnemonic('U');         // Set accelerator
    userIDLabel.setLabelFor(userIDInput);          // Connect label to field
    userIDInput.setFocusAccelerator('U');          // Identify accelerator to field    userIDLabel.setPreferredSize(dbURLLabel.getPreferredSize()); // Set same size
    JLabel passwordLabel = new JLabel("Password: ");
    passwordLabel.setDisplayedMnemonic('P');       // Set accelerator
    passwordLabel.setLabelFor(passwordInput);      // Connect label to field
    passwordInput.setFocusAccelerator('P');        // Identify accelerator to field
    // Box for database URL input
    Box dbPane = Box.createHorizontalBox();    
    dbPane.add(dbURLLabel);
    dbPane.add(database);    // Box for user ID and password input fields
    Box loginPane = Box.createHorizontalBox();
    loginPane.add(userIDLabel);
    loginPane.add(userIDInput);
    loginPane.add(passwordLabel);
    loginPane.add(passwordInput);
    
    Box inputPane = Box.createVerticalBox();
    inputPane.add(dbPane);
    inputPane.add(loginPane);
    getContentPane().add(inputPane, BorderLayout.NORTH);    // Add message area
    status.setText("Enter a database URL and/or press Enter");
    status.setEditable(false);                    // No user input
    status.setLineWrap(true);                     // Lines wrap
    status.setWrapStyleWord(true);                // on word boundaries
    status.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
    getContentPane().add(status, BorderLayout.SOUTH);    // Create tree to go in left split pane
    dbNode = new DefaultMutableTreeNode("No database");
    dbTreeModel = new DefaultTreeModel(dbNode);
    dbTree = new JTree(dbTreeModel);
    treePane = new JScrollPane(dbTree);
    treePane.setBorder(BorderFactory.createLineBorder(Color.darkGray));
    // Create table to go in right split pane
    tableModel = new ResultsModel();
    JTable table = new JTable(tableModel);
    table.setPreferredSize(new Dimension(800,400));
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
    tablePane = new JScrollPane(table);
    tablePane.setBorder(BorderFactory.createLineBorder(Color.darkGray));
      JSplitPane splitpane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
                                          true,             // Continuous relayout
                                          treePane,         // Left pane content
                                          tablePane);       // Right pane content
    getContentPane().add(splitpane, BorderLayout.CENTER);
    splitpane.setDividerLocation(150);                 // Left pane 150 pixels wide
     
    // Add event listeners
    database.addActionListener(this);
    userIDInput.addActionListener(this);
    passwordInput.addActionListener(this);
    dbTree.addTreeSelectionListener(this);
    pack();
  
    setVisible(true);                            // Set window visible
    show();                                      // Display the window
    database.requestFocus();                     // Focus to the url input field
    
    for(int i = 0 ; i < drivers.length ; i++)
      try
      {
        Class.forName(drivers[i]);
      }
      catch(ClassNotFoundException cnfe)
      {
        System.err.println(cnfe);
        status.setText("Driver load failed: " + cnfe.getMessage());
      }  }  private String userID = "guest";
  private String password = "guest";
  private String url = "jdbc:odbc:technical_library";  Connection connection;
  Statement statement;
  private JTextField database = new JTextField(url);
  private JTextField userIDInput = new JTextField(userID);
  private JPasswordField passwordInput = new JPasswordField(password);
  private JTextArea status = new JTextArea(3,30);  private DefaultMutableTreeNode dbNode;      // Root node for the database tree
  private DefaultTreeModel dbTreeModel;       // Model for the database metadata
  private JTree dbTree;                       // Tree to display the metadata
  private JScrollPane treePane;               // Scroll pane holding the tree  ResultsModel tableModel;                    // Model for table
  private JTable table;                       // Table holding table data
  JScrollPane tablePane;                      // Scroll pane holding the table  private String[] drivers = {
                               "sun.jdbc.odbc.JdbcOdbcDriver",       // ODBC bridge
                               "com.imaginary.sql.msql.MsqlDriver"   // mSQL driver
                             };
  public void actionPerformed(ActionEvent e)
  {
    Object source = e.getSource();            // Get source of the event
    if(source == database    ||               // If its URL input,
       source == userIDInput ||               // or userID input,
       source == passwordInput)               // or password input,
    {                                         // we will try for a connection
      url = database.getText();               // Get database URL
      userID = userIDInput.getText();               // Get user ID      char[] pw = passwordInput.getPassword();      // Get password
      if(pw != null)
        password = new String(pw);     if(url == null || url.length()==0)
      {
        status.setText("Please specify a database URL ");
        return;
      }
      openConnection();
      password = null;                             // For security
    }
  }

Answer 2

http://java.sun.com/docs/books/tutorial/uiswing/components/example-swing/index.html#FileChooserDemo2

Answer 3

wrox出的《java专业编程指南》里有相关的例子
去www.wrox.com找一找示便源码下载。

Answer 4

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;class OidNode
{
public int m_id;
private String m_name;
public OidNode(int id,String name)
{
m_id=id;
m_name=name;
}
public int getId()
{
return m_id;
}
public String getName()
{
return m_name;
}
public String toString()
{
return m_name;
}
}public class swingtree
{
JFrame frmMain=new JFrame("JTree");
JTree treeTree1;
JScrollPane pane;
Container c=frmMain.getContentPane();

public swingtree()
{
DefaultMutableTreeNode parentcopy;
DefaultMutableTreeNode top=new DefaultMutableTreeNode(new OidNode(1,"C:\\"));
DefaultMutableTreeNode parent=top;
DefaultMutableTreeNode node=new DefaultMutableTreeNode(new OidNode(0,"Winnt"));
parent.add(node);
parentcopy=parent;
parent=node;
node=new DefaultMutableTreeNode(new OidNode(13,"System32"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(14,"Config"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(15,"Fonts"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(16,"Help"));
parent.add(node);
parent=node;
node=new DefaultMutableTreeNode(new OidNode(17,"News"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(18,"Mail"));
parent.add(node);
parent=parentcopy;

node=new DefaultMutableTreeNode(new OidNode(2,"Program File"));
parent.add(node);
parentcopy=parent;
parent=node;
node=new DefaultMutableTreeNode(new OidNode(6,"MicroSoft Office XP"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(7,"Visual Studio.net"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(8,"Winamp"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(9,"ACD See 3.0"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(10,"Windows Media"));
parent.add(node);
parent=parentcopy;

node=new DefaultMutableTreeNode(new OidNode(3,"My Document"));
parent.add(node);
parentcopy=parent;
parent=node;
node=new DefaultMutableTreeNode(new OidNode(4,"My Picture"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(5,"My Picuture"));
parent.add(node);
parent=parentcopy;

node=new DefaultMutableTreeNode(new OidNode(11,"Inetpub"));
parent.add(node);
parentcopy=parent;
parent=node;
node=new DefaultMutableTreeNode(new OidNode(19,"AdminScrip"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(20,"ftproot"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(21,"wwwroot"));
parent.add(node);
parent=parentcopy; node=new DefaultMutableTreeNode(new OidNode(12,"JDK"));
parent.add(node);
parentcopy=parent;
parent=node;
node=new DefaultMutableTreeNode(new OidNode(22,"bin"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(23,"demo"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(24,"include"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(25,"jre"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(26,"lib"));
parent.add(node);
parent=parentcopy;

node=new DefaultMutableTreeNode(new OidNode(27,"Autoexec.bat"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(28,"Config.sys"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(29,"File0001"));
parent.add(node);
node=new DefaultMutableTreeNode(new OidNode(30,"File0002"));
parent.add(node);


treeTree1=new JTree(top);
treeTree1.setShowsRootHandles(true);
treeTree1.putClientProperty("JTree.lineStyle","Angled");
treeTree1.setEditable(false);
pane=new JScrollPane(treeTree1);
c.add("Center",pane);


/* frmMain.addWindowListener(new WindowAdapter()
{
         public void windowClosing(WindowEvent e)
         {
         System.exit(0);
         }
       });
*/
frmMain.setSize(300,200);
frmMain.setVisible(true);
}
public static void main(String[] args)
{
new swingtree();
}
}