运行程序时抛出NullPointerException，但在调试模式下不抛出Java jssc串口通信

import jssc.SerialPort;
import jssc.SerialPortException;

public class SerialCommunicationExample {
    public static void main(String[] args) {
        SerialPort serialPort = new SerialPort("COM1");
        try {
            if (serialPort.openPort()) {
                System.out.println("Port opened successfully");
                // 设置串口参数
                serialPort.setParams(SerialPort.BAUDRATE_9600,
                                     SerialPort.DATABITS_8,
                                     SerialPort.STOPBITS_1,
                                     SerialPort.PARITY_NONE);
                // 读取数据
                byte[] buffer = serialPort.readBytes();
                System.out.println("Data received: " + new String(buffer));
            } else {
                System.err.println("Failed to open port");
            }
        } catch (SerialPortException e) {
            e.printStackTrace();
        } finally {
            if (serialPort.isOpened()) {
                try {
                    serialPort.closePort();
                } catch (SerialPortException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}