//由命名行输入域名地址即可求出对应的IP地址。 import java.net.*; public class nslookup{ public static void main(String args[]) throws Exception{ String host=args[0]; InetAddress address=null; try{ address=InetAddress.getByName(host); }catch(UnknownHostException e ){ System.out.println("Unknown host"); System.exit(0); } byte[] ip=address.getAddress(); for(int i=0;i<ip.length;i++){ if(i>0) System.out.print("."); System.out.print(ip[i]&0xff); } System.out.println(); } } 运行结果: C:\java>java nslookup www.sina.com 218.30.12.192 C:\java> 来源: java学习室

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