Java How to Program Fourth Edition - DCC

Chapter 17 Networking 1001
132 // read message and display it
133 try {
134 message = ( String ) input.readObject();
135 displayArea.append( "\n" + message );
136 displayArea.setCaretPosition(
137 displayArea.getText().length() );
138 }
139
140 // catch problems reading from server
141 catch ( ClassNotFoundException classNotFoundException ) {
142 displayArea.append( "\nUnknown object type received" );
143 }
144
145 } while ( !message.equals( "SERVER>>> TERMINATE" ) );
146
147 } // end method process connection
148
149 // close streams and socket
150 private void closeConnection() throws IOException
151 {
152 displayArea.append( "\nClosing connection" );
153 output.close();
154 input.close();
155 client.close();
156 }
157
158 // send message to server
159 private void sendData( String message )
160 {
161 // send object to server
162 try {
163 output.writeObject( "CLIENT>>> " + message );
164 output.flush();
165 displayArea.append( "\nCLIENT>>>" + message );
166 }
167
168 // process problems sending object
169 catch ( IOException ioException ) {
170 displayArea.append( "\nError writing object" );
171 }
172 }
173
174 // execute application
175 public static void main( String args[] )
176 {
177 Client application;
178
179 if ( args.length == 0 )
180 application = new Client( "127.0.0.1" );
181 else
182 application = new Client( args[ 0 ] );
183
Fig. Fig. 17.5 17.5 Demonstrating the client portion of a stream-socket connection between a
client and a server (part 4 of 5).