### Question:
NetUtils { public static boolean isAnyHost(String host) { return Constants.ANYHOST_VALUE.equals(host); }  static int getRandomPort(); static int getAvailablePort(); static int getAvailablePort(int port); static boolean isInvalidPort(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 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);  }### Answer:
@Test public void testIsAnyHost() throws Exception { assertTrue(NetUtils.isAnyHost("0.0.0.0")); assertFalse(NetUtils.isAnyHost("1.1.1.1")); }