The question says to use a socket connection to allow a user to specify a file name and have the server send the contents of that file or indicate that the file does not exist.
This is what I have so far and I know its not right, im not sure where to make changes or what to add.
When I try to compile it I just get a error that says â cannot find symbol setTextFieldEditable( true ); ââ¦Why is that..?
Any help will be appreciated, it seems Im a bit lost.
// Client.java
import java.io.EOFException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.SwingUtilities;
public class Client extends JFrame
{
private JTextField enterField; // JTextField to enter site name from user
private JTextArea displayArea; //display info to user
private JEditorPane contentsArea; // to display Web site
private ObjectOutputStream output; //output stream to server
private ObjectInputStream input; //input stream from server
private String message = ""; //message from server
private String chatServer; //host server for this application
private Socket client; //socket to communicate with server
// initialize chatServer and set up GUI
public Client( String host )
{
super( "Client" );
chatServer = host; //set server to which this client connects
// create enterField and register its listener
enterField = new JTextField( "Specify file name" ); //create enter field
enterField.addActionListener(
new ActionListener()
{
// get file specified by user
public void actionPerformed( ActionEvent event )
{
getThePage( event.getActionCommand() );
} // end method actionPerformed
} // end inner class
); // end call to addActionListener
add( enterField, BorderLayout.NORTH );
contentsArea = new JEditorPane(); // create contentsArea
contentsArea.setEditable( false );
contentsArea.addHyperlinkListener(
new HyperlinkListener()
{
// if user clicked hyperlink, go to specified page
public void hyperlinkUpdate( HyperlinkEvent event )
{
if ( event.getEventType() ==
HyperlinkEvent.EventType.ACTIVATED )
getThePage( event.getURL().toString() );
} // end method hyperlinkUpdate
} // end inner class
); // end call to addHyperlinkListener
add( new JScrollPane( contentsArea ), BorderLayout.CENTER );
setSize( 400, 300 ); // set size of window
setVisible( true ); // show window
} // end Client constructor
// connect to server and process messages from server
public void runClient()
{
try // connect to server, get streams, process connection
{
connectToServer(); // create a Socket to make connection
getStreams(); // get the input and output streams
processConnection(); // process connection
} // end try
catch ( EOFException eofException )
{
System.out.printf( "\nClient terminated connection" );
} // end catch
catch ( IOException ioException )
{
ioException.printStackTrace();
} // end catch
finally
{
closeConnection(); // close connection
} // end finally
} // end method runClient
// connect to server
private void connectToServer() throws IOException
{
System.out.printf( "Attempting connection\n" );
// create Socket to make connection to server
client = new Socket( InetAddress.getByName( chatServer ), 12345 );
// display connection information
System.out.printf( "Connected to: " +
client.getInetAddress().getHostName() );
} // end method connectToServer
// get streams to send and receive data
private void getStreams() throws IOException
{
// set up output stream for objects
output = new ObjectOutputStream( client.getOutputStream() );
output.flush(); // flush output buffer to send header information
// set up input stream for objects
input = new ObjectInputStream( client.getInputStream() );
System.out.printf( "\nGot I/O streams\n" );
} // end method getStreams
// process connection with server
private void processConnection() throws IOException
{
// enable enterField so client user can send messages
setTextFieldEditable( true );
do // process messages sent from server
{
try // read message and display it
{
message = ( String ) input.readObject(); // read new message
System.out.printf( "\n" + message ); // display message
} // end try
catch ( ClassNotFoundException classNotFoundException )
{
System.out.printf( "\nUnknown object type received" );
} // end catch
} while ( !message.equals( "SERVER>>> TERMINATE" ) );
} // end method processConnection
// close streams and socket
private void closeConnection()
{
System.out.printf( "\nClosing connection" );
setTextFieldEditable( false ); // disable enterField
try
{
output.close(); // close output stream
input.close(); // close input stream
client.close(); // close socket
} // end try
catch ( IOException ioException )
{
ioException.printStackTrace();
} // end catch
} // end method closeConnection
// send message to server
private void sendData( String message )
{
try // send object to server
{
output.writeObject( "CLIENT>>> " + message );
output.flush(); // flush data to output
System.out.printf( "\nCLIENT>>> " + message );
} // end try
catch ( IOException ioException )
{
displayArea.append( "\nError writing object" );
} // end catch
} // end method sendData
// load document
private void getThePage( String location )
{
try // load document and display location
{
contentsArea.setPage( location ); // set the page
enterField.setText( location ); // set the text
} // end try
catch ( IOException ioException )
{
JOptionPane.showMessageDialog( this,
"Error retrieving specified file", "File does not exist",
JOptionPane.ERROR_MESSAGE );
} // end catch
} // end method getThePage
} // end class Client
Socket connection
