Java 示例 - 创建套接字

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  问题描述

  如何在特定端口创建套接字？
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  解决方案

  下面的例子展示了如何唱 Socket 类的 Socket 构造函数。还可以使用 getLocalPort() getLocalAddress 、 getInetAddress() 和 getPort() 方法获取 Socket 详细信息。

  
  import java.io.IOException;
  import java.net.InetAddress;
  import java.net.Socket;
  import java.net.SocketException;
  import java.net.UnknownHostException;
  public class Main {
     public static void main(String[] args) {
        try {
           InetAddress addr = InetAddress.getByName("74.125.67.100");
           Socket theSocket = new Socket(addr, 80);
           System.out.println("Connected to " 
              + theSocket.getInetAddress()
              + " on port " + theSocket.getPort() + " from port "
              + theSocket.getLocalPort() + " of " 
              + theSocket.getLocalAddress());
        } catch (UnknownHostException e) {
           System.err.println("I can't find " + e  );
        } catch (SocketException e) {
           System.err.println("Could not connect to " +e );
        } catch (IOException e) {
           System.err.println(e);
        }
     }
  }
  

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  结果

  上面的代码示例将产生以下结果。

  
  Connected to /74.125.67.100 on port 80 from port 
  2857 of /192.168.1.4
  

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