package apibook.c5.s1;import java.net.*;//測試InetAddress類public class TestInetAddress {  public TestInetAddress() {  }  public static void main(String[] args) {    try{        InetAddress a =          InetAddress.getByName("localhost");//以本機名測試        System.out.println("by name:" + a);//輸出結果        a = InetAddress.getByName("127.0.0.1");//以本機ip測試        System.out.println("by ip:" + a);//輸出結果    }    catch (Exception e)    {      e.printStackTrace();    }  }}