### Question:
NetUtils { public static boolean isInvalidPort(int port) { return port <= MIN_PORT || port > MAX_PORT; }  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 testIsInvalidPort() throws Exception { assertTrue(NetUtils.isInvalidPort(0)); assertTrue(NetUtils.isInvalidPort(65536)); assertFalse(NetUtils.isInvalidPort(1024)); }