Java TCP/IP协议笔记：基本套接字

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套接字地址

InetAddress类代表了一个网络目标地址，包括主机名和数字类型的地址信息。该类有两个子类，Inet4Address和 Inet6AddressInetAddress
实例是不可变的，一旦创建，每个实例就始终指向同一个地址NetworkInterface 类提供了访问主机所有接口的信息的功能。

package network;import java.net.InetAddress;import java.net.NetworkInterface;import java.net.SocketException;import java.net.UnknownHostException;import java.util.Enumeration;public class InetAddressExample {/** * @param args */public static void main(String[] args) {try {//获取网络接口列表Enumeration<NetworkInterface> interfaceList = NetworkInterface.getNetworkInterfaces();if (interfaceList != null) {while (interfaceList.hasMoreElements()) {NetworkInterface iface = interfaceList.nextElement();//getName，返回网络接口的本地名称，如：lo0"或"eth0System.out.println("Interface " + iface.getName() + ":");//获取网络接口相关联的地址Enumeration<InetAddress> addrList = iface.getInetAddresses();while (addrList.hasMoreElements()) {InetAddress inetAddr = addrList.nextElement();//获取地址对应的主机名称和地址(数字标识)System.out.println("addr: " + inetAddr.getHostName()+ "\t" + inetAddr.getHostAddress());}}}InetAddress[] addresses = InetAddress.getAllByName("127.0.0.1");for (InetAddress adr : addresses) {System.out.println(adr.getHostName());}} catch (SocketException e) {e.printStackTrace();} catch (UnknownHostException e) {e.printStackTrace();}}}