This some coding sample to creating socket connection in Java. This simple application will be sending message through TCP/IP connection and wait for response from server.
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
/**
*
* @author Erwin
*/
public class SendMessage {
public static void main(String[] args) {
try {
int port = 14000;
// Create Socket address for configuring socket configuration
SocketAddress sockaddr = new InetSocketAddress("127.0.0.1", port);
// Create socket Object
Socket sock = new Socket();
// if timeout is reached and no response is received, it will throw socket exception
int timeoutMs = 2000; // in milliseconds
// Initiate socket connection to server
sock.connect(sockaddr, timeoutMs);
try {
// Create Buffered Writer object to write String or Byte to socket output stream
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(sock.getOutputStream()));
String command = "Start Module";
wr.write(command);
System.out.println("Send String : "+command);
// Flushing the writer
wr.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(sock.getInputStream()));
String str;
while ((str = rd.readLine()) != null) {
System.out.println(str);
}
rd.close();
} catch (IOException e) {
e.printStackTrace();
}
// Close socket connection after finish receiving a response
sock.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketTimeoutException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Hope this will be helpfull. Regards, Erwin Lin