import java.awt.*;import java.util.*;import javax.swing.*;import java.io.*;import com.heaton.bot.*;/** * Example program from Chapter 4 * Programming Spiders, Bots and Aggregators in Java * Copyright 2001 by Jeff Heaton * * * This program accepts a URL as input and then scans all images * from that one page. These images are saved to the specified * directory. * * @author Jeff Heaton * @version 1.0 */public class GetImage extends javax.swing.JFrame {  /**   * The constructor.   */  public GetImage()  {    //{{INIT_CONTROLS    setTitle("Download Images");    getContentPane().setLayout(null);    setSize(405,305);    setVisible(false);    JLabel1.setHorizontalTextPosition(javax.swing.SwingConstants.LEFT);    JLabel1.setVerticalTextPosition(javax.swing.SwingConstants.TOP);    JLabel1.setVerticalAlignment(javax.swing.SwingConstants.TOP);    JLabel1.setText("Download images from(one page only):");    getContentPane().add(JLabel1);    JLabel1.setBounds(12,12,384,24);    JLabel2.setText("URL:");    getContentPane().add(JLabel2);    JLabel2.setBounds(12,36,36,24);    getContentPane().add(_url);    _url.setBounds(48,36,348,24);    JLabel3.setText("Select local path to download images to:");    getContentPane().add(JLabel3);    JLabel3.setBounds(12,72,384,24);    getContentPane().add(_save);    _save.setBounds(12,96,384,24);    JScrollPane1.setOpaque(true);    getContentPane().add(JScrollPane1);    JScrollPane1.setBounds(12,168,384,132);    JScrollPane1.getViewport().add(_log);    _log.setBounds(0,0,381,129);    _go.setText("GO!");    getContentPane().add(_go);    _go.setBounds(84,132,216,24);    _go.setActionCommand("jbutton");    //}}    //{{INIT_MENUS    //}}    //{{REGISTER_LISTENERS    SymAction lSymAction = new SymAction();    _go.addActionListener(lSymAction);    //}}    setLocation(32,32);  }  /**   * Added by Visual Cafe.   *   * @param b   */  public void setVisible(boolean b)  {    if ( b )      setLocation(50, 50);    super.setVisible(b);  }  /**   * Program entry point.   *   * @param args   */  static public void main(String args[])  {    (new GetImage()).setVisible(true);  }  /**   * Added by Visual Cafe.   */  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 and menu bar    Insets insets = getInsets();    javax.swing.JMenuBar menuBar = getRootPane().getJMenuBar();    int menuBarHeight = 0;    if ( menuBar != null )      menuBarHeight = menuBar.getPreferredSize().height;    setSize(insets.left +            insets.right +            size.width,            insets.top +            insets.bottom +            size.height + menuBarHeight);  }  // Used by addNotify  boolean frameSizeAdjusted = false;  //{{DECLARE_CONTROLS  javax.swing.JLabel JLabel1 = new javax.swing.JLabel();  javax.swing.JLabel JLabel2 = new javax.swing.JLabel();  /**   * The URL to be scanned for images.   */  javax.swing.JTextField _url = new javax.swing.JTextField();  javax.swing.JLabel JLabel3 = new javax.swing.JLabel();  /**   * The directory that these images are to be saved in.   */  javax.swing.JTextField _save = new javax.swing.JTextField();  javax.swing.JScrollPane JScrollPane1 = new javax.swing.JScrollPane();  /**   * Progress display.   */  javax.swing.JList _log = new javax.swing.JList();  /**   * Button to be pressed to start the scan.   */  javax.swing.JButton _go = new javax.swing.JButton();  //}}  //{{DECLARE_MENUS  //}}  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 for each image. The name(URL) of each image   * is passed to this method so it can be retrieved and   * saved.   *   * @param name The complete URL to an image to save.   */  protected void processImage(String name)  {    try {      if ( _save.getText().length()>0 ) {        int i = name.lastIndexOf('/');        if ( i!=-1 ) {          FileOutputStream fso          = new FileOutputStream(                                new File(_save.getText(),name.substring(i)) );          HTTPSocket http = new HTTPSocket();          http.send(name,null);          fso.write( http.getBodyBytes() );          fso.close();        }      }    } catch ( Exception e ) {      JOptionPane.showMessageDialog(this,                                    e,                                    "Error",                                    JOptionPane.OK_CANCEL_OPTION,                                    null );    }  }  /**   * This is where most of the action takes place. This   * method is called when the GO! button is pressed.   *   * @param event The event   */  void Go_actionPerformed(java.awt.event.ActionEvent event)  {    try {      // open the connection and get the page.      HTTPSocket http = new HTTPSocket();      HTMLPage page = new HTMLPage(http);      page.open(_url.getText(),null);      // look at the images.      Vector vec = page.getImages();      if ( vec.size()>0 ) {        // copy the images to an array for display        String array[] = new String[vec.size()];        vec.copyInto(array);        _log.setListData( array );        // loop through and process each image        for ( int i=0;i<vec.size();i++ )          processImage((String)vec.elementAt(i));      }    } catch ( Exception e ) {      String s[] = new String[1];      s[0] = "Error: " + e;      _log.setListData( s );    }  }}