address.java

java2应用开发指南第一版

//【代码19-2-5】
// Address.java
import java.io.*;
import java.net.*;

public class Address
{
    public static void main(String[] args) throws IOException 
{
        if (args.length != 1) 
{
             System.out.println("Usage: java Address <hostname>");
             return;
        }
	   //通过计算机名称获取IP地址
	   InetAddress address = InetAddress.getByName(args[0]);
	   System.out.println("输入的主机名称"+args[0]);
	   //通过IP地址获取计算机名称
       String strName = address.getHostName();
	   System.out.println("程序获取的主机名称"+strName);
    }
}