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Socket.java

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import java.net.*;

import java.io.*;

public class Socket{

public static testClient(String hostName, String portNumber){

try {

Socket s1 = new Socket(hostName, portNumber);

InputStream is = s1.getInputStream();

DataInputStream dis = new DataInputStream(is);

System.out.println(dis.readUTF());

dis.close();

s1.close();

} catch (ConnectException connExc) {

System.err.println("Cannot connect");

} catch (IOException e) {

}

}

public static testServer(){

ServerSocket s = null;

try {

s = new ServerSocket(8888);

} catch (IOException e) {}

while (true) {

try {

Socket s1 = s.accept();

OutputStream os = s1.getOutputStream();

DataOutputStream dos = new DataOutputStream(os);

dos.writeUTF("Hello,bye-bye!");

dos.close();

s1.close();

} catch (IOException e) {}

}

}

}