import java.awt.*;import javax.swing.*;import javax.swing.table.*;import com.heaton.bot.*;/** * Example program from Chapter 2 * Programming Spiders, Bots and Aggregators in Java * Copyright 2001 by Jeff Heaton * * * This application displays a dialog box that allows the user to specify any URL. * This URL is requested, using the Bot package, and displayed in the dialog box. * Both the body and HTTP headers are displayed. * * @author Jeff Heaton * @version 1.0 */public class ViewURL extends javax.swing.JFrame {  /**   * The HTTP connection used by this application.   */  HTTP _http;  /**   * The constructor.  This method sets up all the   * components needed by this class.   * A new HTTPSocket object is also constructed to manange   * the connection.   */  public ViewURL()  {    _http = new HTTPSocket();    //{{INIT_CONTROLS    setTitle("View URL");    getContentPane().setLayout(null);    setSize(495,341);    setVisible(false);    getContentPane().add(_pane2);    _pane2.setBounds(12,168,456,144);    _body.setEditable(false);    _pane2.getViewport().add(_body);    _body.setBounds(0,0,453,141);    getContentPane().add(_pane1);    _pane1.setBounds(12,72,456,72);    _pane1.getViewport().add(_headers);    _headers.setBounds(0,0,453,0);    _label3.setText("Body");    getContentPane().add(_label3);    _label3.setBounds(12,144,456,12);    _label1.setText("URL:");    getContentPane().add(_label1);    _label1.setBounds(12,12,36,24);    _url.setText("http://www.jeffheaton.com");    getContentPane().add(_url);    _url.setBounds(48,12,348,24);    _go.setText("Go");    _go.setActionCommand("Go");    getContentPane().add(_go);    _go.setBounds(408,12,60,24);    _label2.setText("HTTP Headers");    getContentPane().add(_label2);    _label2.setBounds(12,48,384,12);    //}}    //{{REGISTER_LISTENERS    SymWindow aSymWindow = new SymWindow();    this.addWindowListener(aSymWindow);    SymAction lSymAction = new SymAction();    _go.addActionListener(lSymAction);    //}}    setLocation(32,32);  }  /**   * Set the visibility of this window.   *   * @param b true for visible, false for invisible   */  public void setVisible(boolean b)  {    if ( b )      setLocation(50, 50);    super.setVisible(b);  }  /**   * The entry point for this application.   *   * @param args Arguments are not used by this program.   * Required for proper main signature.   */  static public void main(String args[])  {    (new ViewURL()).setVisible(true);  }  /**   * Called to add notification handlers.   */  public void addNotify()  {    // Record the size of the window prior to calling parents addNotify.    Dimension size = getSize();    super.addNotify();    if ( frameSizeAdjusted )      return;    frameSizeAdjusted = true;    // Adjust size of frame according to the insets    Insets insets = getInsets();    setSize(insets.left +            insets.right +            size.width,            insets.top +            insets.bottom +            size.height);  }  /**   * Put here by Visual Cafe.   */  // Used by addNotify  boolean frameSizeAdjusted = false;  //{{DECLARE_CONTROLS  /**   * The bottom scroll pane.   */  javax.swing.JScrollPane _pane2 = new javax.swing.JScrollPane();  /**   * The area that the body of this HTTP request will be displayed.   */  javax.swing.JTextArea _body = new javax.swing.JTextArea();  /**   * The top scroll pane.   */  javax.swing.JScrollPane _pane1 = new javax.swing.JScrollPane();  /**   * The area that the HTTP headers will be stored.   */  javax.swing.JTable _headers = new javax.swing.JTable();  /**   * A static label.   */  javax.swing.JLabel _label3 = new javax.swing.JLabel();  /**   * A static label.   */  javax.swing.JLabel _label1 = new javax.swing.JLabel();  /**   * The URL requested by the user.   */  javax.swing.JTextField _url = new javax.swing.JTextField();  /**   * The GO button.   */  javax.swing.JButton _go = new javax.swing.JButton();  /**   * A static label.   */  javax.swing.JLabel _label2 = new javax.swing.JLabel();  //}}  /**   * Class created by Visual Cafe   */  class SymWindow extends java.awt.event.WindowAdapter {    public void windowClosed(java.awt.event.WindowEvent event)    {      Object object = event.getSource();      if ( object == ViewURL.this )        ViewURL_windowClosed(event);    }    public void windowClosing(java.awt.event.WindowEvent event)    {      Object object = event.getSource();      if ( object == ViewURL.this )        ViewURL_WindowClosing(event);    }  }  /**   * Called when the window closes.   *   * @param event The event.   */  void ViewURL_WindowClosing(java.awt.event.WindowEvent event)  {    // Hide the Frame    setVisible(false);    // Free the system resources    dispose();  }  //{{DECLARE_MENUS  //}}  /**   * Class created by Visual Cafe   */  class SymAction implements java.awt.event.ActionListener {    public void actionPerformed(java.awt.event.ActionEvent event)    {      Object object = event.getSource();      if ( object == _go )        Go_actionPerformed(event);    }  }  /**   * Called when the GO button is clicked.   *   * @param event The event.   */  void Go_actionPerformed(java.awt.event.ActionEvent event)  {    try {      _http.send(_url.getText(),null);      _body.setText(_http.getBody());      _url.setText(_http.getURL());      TableModel dataModel = new AbstractTableModel()      {        public int getColumnCount() { return 2;}        public int getRowCount() { return _http.getServerHeaders().length();}        public String getColumnName(int columnIndex)        {          switch ( columnIndex ) {          case 0:return "HTTP Header";          case 1:return "Value";          }          return "";        }        public Object getValueAt(int row, int col)        {          if ( col==0 )            return _http.getServerHeaders().get(row).getName();          else            return _http.getServerHeaders().get(row).getValue();        }      };      _headers.setModel(dataModel);      _headers.sizeColumnsToFit(0);    } catch ( Exception e ) {      _body.setText(e.toString());    }  }  /**   * Called once the window closes.   *   * @param event The event.   */  void ViewURL_windowClosed(java.awt.event.WindowEvent event)  {    System.exit(0);  }}