InetAddress 获得IP

import java.net.InetAddress ;
public class InetAddressDemo{
	public static void main(String args[]) throws Exception {// 所有异常抛出
		InetAddress locAdd = null ;
		InetAddress remAdd = null ;
		locAdd = InetAddress.getLocalHost() ;// 得到本机
		remAdd = InetAddress.getByName("http://www.mldnjava.cn/")  ;
		System.out.println("本机的IP地址：" + locAdd.getHostAddress()) ;
		System.out.println("MLDNJAVA的IP地址：" + remAdd.getHostAddress()) ;
		System.out.println("本机是否可达：" + locAdd.isReachable(5000)) ;
	}
};