当给定的地址是本地地址时返回true。

/**
时代Java公众号 - N o w J a  v a . c o m 提供 
**/

//package com.nowjava;

import java.net.InetAddress;


public class Main {

    /**

     * Returns true when the given address is a local address.

     * @param addr address

     * @return true when the given address is a local address

     */

    public static boolean hasLocalScope(InetAddress addr) {

        if (addr == null)

            throw new IllegalArgumentException("Must not be null!");

        return (addr.isAnyLocalAddress() || addr.isLinkLocalAddress() || addr

                .isLoopbackAddress());

    }

}