Java 示例 - 创建套接字

  • 问题描述

    如何在特定端口创建套接字?
  • 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);
          }
       }
    }
    
  • 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