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How to use a JEditorPane to display the contents of a file on a web server |
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This Java Swing tip illustrates a method of displaying the contents of a file on
a Web server. Developer may use this as a simple web browser in their application.
JEditorPane is sort of a fancy text area that can display text derived from
different file formats. The built-in version supports HTML and RTF (Rich Text Format) only.
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
public class ReadServerFile extends JFrame {
private JTextField enter;
private JEditorPane contents;
public ReadServerFile()
{
super( "Simple Web Browser" );
Container c = getContentPane();
enter = new JTextField( "Enter file URL here" );
enter.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent e )
{
getThePage( e.getActionCommand() );
}
}
);
c.add( enter, BorderLayout.NORTH );
contents = new JEditorPane();
contents.setEditable( false );
contents.addHyperlinkListener(
new HyperlinkListener() {
public void hyperlinkUpdate( HyperlinkEvent e )
{
if ( e.getEventType() ==
HyperlinkEvent.EventType.ACTIVATED )
getThePage( e.getURL().toString() );
}
}
);
c.add( new JScrollPane( contents ),
BorderLayout.CENTER );
setSize( 400, 300 );
show();
}
private void getThePage( String location )
{
setCursor( Cursor.getPredefinedCursor(
Cursor.WAIT_CURSOR ) );
try {
contents.setPage( location );
enter.setText( location );
}
catch ( IOException io ) {
JOptionPane.showMessageDialog( this,
"Error retrieving specified URL",
"Bad URL",
JOptionPane.ERROR_MESSAGE );
}
setCursor( Cursor.getPredefinedCursor(
Cursor.DEFAULT_CURSOR ) );
}
public static void main( String args[] )
{
ReadServerFile app = new ReadServerFile();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e )
{
System.exit( 0 );
}
}
);
}
}
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