java 获得本地IP和远程服务器IP

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
/*获取IP地址*/
public class CatchIp 
{
	private InetAddress LocalIP = null;
	private InetAddress ServerIP = null;
	public static void main(String[] args) 
	{
		CatchIp mytest;
		mytest = new CatchIp();
		System.out.println("LocalHost IP is:"+mytest.catchLocalIP());
		System.out.println("Server IP is:"+mytest.catchServerIP());
	}
	//取得本机IP地址
	public InetAddress catchLocalIP()
	{
		try 
		{
			LocalIP = InetAddress.getLocalHost();
		} catch (UnknownHostException e) 
		{
			
		}
		return LocalIP;
		
	}
	//取得服务器网络地址
	public InetAddress catchServerIP()
	{
		try {
			ServerIP = InetAddress.getByName("www.sina.com.cn");
			//取得www.sina.com.cn的IP地址
		} catch (UnknownHostException e) 
		{
			System.out.println(e.getMessage());
		}
		return ServerIP;
		
	}
	
}