怎样用JAVA程序获取本机ip ?

import java.net.InetAddress;
import java.net.UnknownHostException;

public class Test
{
public static void main(String[] args) throws UnknownHostException
{
InetAddress inet = InetAddress.getLocalHost();
System.out.println("本机的ip=" + inet.getHostAddress());

}
}

我还以为是在JAVA中呢，原来是JSP中

request.getLocalAddr();

使用java.net.InetAddress.getHostAddress()函数，返回的是字符串数据类型。