echoclientexample.java

来自「java 完全探索的随书源码」· Java 代码 · 共 52 行

import java.net.*;
import java.io.*;

public class EchoClientExample
{
  public static final String HOST = "www.gatech.edu";
  public static final int PORT = 7;

  // Default Constructor
  public EchoClientExample()
  {
    super();
  }

  public void testEcho()
  {
    try
    {
      // Get connected to an echo server somewhere, they are usually on
      // port 7 of a well known server
      Socket socket = new Socket( HOST, PORT );
      // Create a reader and stream for reading the data from the echo server
      BufferedReader input = new BufferedReader( new InputStreamReader(socket.getInputStream()));
      // Create a writer and stream for writing to the echo server
      PrintWriter output = new PrintWriter( socket.getOutputStream(), true);
      // Send some text to the echo server
      System.out.println( "Sending Hello to the echo server" );
      output.println( "Hello" );
      // Get the message from the echo server
      System.out.println( input.readLine() + " from the echo server at " + HOST );

      // Close the socket
      socket.close();
    }
    catch(UnknownHostException ex)
    {
      System.err.println("Unknown host: " + ex);
      System.exit(1);
    }
    catch(IOException excpt)
    {
      System.err.println("Failed I/O: " + excpt);
      System.exit(1);
    }
  }

  public static void main(String[] args)
  {
    EchoClientExample example = new EchoClientExample();
    example.testEcho();
  }
}