echo.java

一步 教你学会java 完成一个完整的SWT系统 是本人学习java时按教程一步一步写下来的咯

/**
 *  Example code for JavaOne hands-on J2SE lab
 *
 *  Concurrency utilities (JSR-166) example
 **/
package threadpool;

import java.net.*;
import java.io.*;
import java.util.concurrent.*;

/**
 *  Echo characters from the keyboard to a socket.  Simplified version of
 *  telnet
 **/
public class Echo {
  /**
   *  Main entry point
   *
   * @param args Command line arguments
   **/
  public static void main(String[] args) {
    String host = null;
    int port = 0;

    if (args.length < 2) {
      host = "127.0.0.1";
      port = 8100;
    }

    OutputStream os = null;

    try {
      Socket s = new Socket(host, port);
      os = s.getOutputStream();
      System.out.println("Connection established to server. Type characters and press <ENTER> to send");
      System.out.println("Type EXIT and press <RETURN> to exit");

      /*  Read from the standard input and send to the remote socket  */
      while (true) {
        byte[] inData = new byte[100];

        System.in.read(inData);
        String inString = new String(inData);

        if (inString.substring(0, 4).compareTo("EXIT") == 0)
          System.exit(1);

        os.write(inData);
      }
    } catch (Exception e) {
      System.out.println("Failed to connect to remote host: " +
        e.getMessage());
    }
  }
}