JAVA判断ip、端口是否可连接

public static boolean isHostConnectable(String host, int port) {
Socket socket = new Socket();
try {
socket.connect(new InetSocketAddress(host, port));
} catch (IOException e) {
e.printStackTrace();
return false;
} finally {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return true;
}

public static boolean isHostReachable(String host, Integer timeOut) {
try {
return InetAddress.getByName(host).isReachable(timeOut);
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}