我的第一个socket

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第一个是Server。类名是：Tcpsocket

package **;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class TcpServer {

/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
  ServerSocket ss=new ServerSocket(3000);
  Socket s=ss.accept();
  //s.getInputStream();
  OutputStream os=s.getOutputStream();
  PrintWriter pw=new PrintWriter(os);
  pw.println("Hello world!哈喽啊。");
  pw.close();
  os.close();
  s.close();
  ss.close();
}

}
第二个是Client。类名是TcpClient

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class TcpClient {

/**
* @param args
* @throws IOException
* @throws UnknownHostException
*/
public static void main(String[] args) throws UnknownHostException, IOException {
  Socket s=new Socket("127.0.0.1",3000);
  //亦可使用 new Socket("127.0.0.1",3000);
  InputStream is=s.getInputStream();
  BufferedReader br=new BufferedReader(new InputStreamReader(is));
  String str=br.readLine();
  System.out.println(str+"hello");
  br.close();
  is.close();
  s.close();

}

}
执行顺序是先运行Server在运行Client 然后Client向server发送信息。