### Question:
NetUtils { public static boolean isLocalHost(String host) { return host != null && (LOCAL_IP_PATTERN.matcher(host).matches() || host.equalsIgnoreCase("localhost")); }  static int getRandomPort(); static int getAvailablePort(); static int getAvailablePort(int port); static boolean isValidAddress(String address); static boolean isLocalHost(String host); static boolean isAnyHost(String host); static boolean isInvalidLocalHost(String host); static boolean isValidLocalHost(String host); static InetSocketAddress getLocalSocketAddress(String host, int port); static String getLocalHost(); static String filterLocalHost(String host); static InetAddress getLocalAddress(); static String getLogHost(); static String getHostName(String address); static String getIpByHost(String hostName); static String toAddressString(InetSocketAddress address); static InetSocketAddress toAddress(String address); static String toURL(String protocol, String host, int port, String path); static final String LOCALHOST; static final String ANYHOST; }### Answer:
@Test public void isLocalHost() throws Exception { Assert.assertTrue(NetUtils.isLocalHost("127.0.0.1")); Assert.assertTrue(NetUtils.isLocalHost("127.0.00.1")); Assert.assertFalse(NetUtils.isLocalHost("192.168.0.1")); Assert.assertFalse(NetUtils.isLocalHost("127.0.0.1.a1")); Assert.assertFalse(NetUtils.isLocalHost("1.127.0.0.1")); Assert.assertFalse(NetUtils.isLocalHost("1.127.0.0.1.1")); Assert.assertTrue(NetUtils.isLocalHost("127.0.0.2")); Assert.assertTrue(NetUtils.isLocalHost("127.0.0.2")); Assert.assertTrue(NetUtils.isLocalHost("127.0.0.254")); Assert.assertTrue(NetUtils.isLocalHost("127.0.0.255")); }