(1. The netbeans package of the project directly exported is originally a java file, so it is OK to copy the code directly. However, the requirements indicate that it is javafx. 2. This project is not a complete version, but only reads data from the attendance machine. 3. This project does not use any data provided by the attendance machine manufacturer at all, so the equipment brand will not be mentioned. It is far fetched to crack. 4. The intention is to provide you with an idea, because someone is asking me about the code I originally wrote based on the information provided by the manufacturer. That method is too bad. If there is something that can't be solved, please come to our Love Open Source to have a look. There must be materials or software, tutorials, patches, source code, etc. you need)