[网络编程]——InetAddress_InetSocketAddress

public class Inet01 {
/**
* 没有封装端口
* @author Administrator
*
*/
/**
* @param args
* @throws UnknownHostException
* @throws MalformedURLException
*/
public static void main(String[] args) throws UnknownHostException{
//使用getLocalHost方法创建InetAddress对象
InetAddress addr = InetAddress.getLocalHost();
System.out.println(addr.getHostAddress());  //返回：192.168.1.100
System.out.println(addr.getHostName());  //输出计算机名
//根据域名得到InetAddress对象
addr = InetAddress.getByName("www.baidu.com");
System.out.println(addr.getHostAddress());  //返回 163服务器的ip:61.135.253.15
System.out.println(addr.getHostName());  //输出：www.163.com
//根据ip得到InetAddress对象
addr = InetAddress.getByName("61.135.253.15");
System.out.println(addr.getHostAddress());  //返回 163服务器的ip:61.135.253.15
System.out.println(addr.getHostName());  //输出ip而不是域名。如果这个IP地 址不存在或DNS服务器不允许进行IP地址和域名的映射，getHostName方法就直接返回这个IP地址。
}

}

/**
* 封装端口:在InetAddress基础上+端口
* @author Administrator
*
*/
public class InetSocketDemo01 {
/**
* @param args
* @throws UnknownHostException
*/
public static void main(String[] args) throws UnknownHostException {
InetSocketAddress  address = new InetSocketAddress("127.8.0.1",9999);
//address = new InetSocketAddress(InetAddress.getByName("127.3.0.1"),9999);
System.out.println(address.getHostName());
System.out.println(address.getPort());
InetAddress addr =address.getAddress();
System.out.println(addr.getHostAddress());  //返回：地址
System.out.println(addr.getHostName());  //输出计算机名

}
}