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Displaying Source Code(s)
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Downloading a Web Page Using Socket Class.
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import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
public class OpenURLSocket
{
public static void main(String []args)
{
JFrame frame = new SimpleFrame();
frame.show();
}
}
class SimpleFrame extends JFrame implements ActionListener
{
private BufferedReader in;
private PrintWriter out;
private JTextField urltext;
private JTextArea text;
private JLabel urlLbl;
private JEditorPane edit;
public SimpleFrame()
{
setTitle("URL Download Demo");
setSize(200,300);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
getContentPane().setLayout(new FlowLayout(FlowLayout.LEFT));
urlLbl = new JLabel("Please enter a URL to download");
getContentPane().add(urlLbl);
urltext = new JTextField(20);
urltext.setText("http://");
getContentPane().add(urltext);
text = new JTextArea(10,50);
getContentPane().add(text);
JScrollPane p1 = new JScrollPane(text);
getContentPane().add(p1);
JButton downButton = new JButton("Download URL");
downButton.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.add(downButton);
getContentPane().add(downButton);
}
public void actionPerformed(ActionEvent evt)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
downloadURL();
}
}
);
}
public void downloadURL()
{
try
{
Socket s = new Socket(urltext.getText(),80);
BufferedReader in = new BufferedReader(new
InputStreamReader(s.getInputStream()));
boolean more = true;
while(more)
{
String line = in.readLine();
if(line==null) more=false;
else
text.setText(text.getText() + line);
}
}
catch(IOException e)
{
text.setText("Error: " + e);
}
}
} |
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