czcc

package com.uart.hal.servicepublic class UARTHALService {   private static UARTHALService UartHalService;   //实现了UARTHALService类的singleton模式   public static UARTHALService getInstance()   {      if(UartHalService == null)         return new UARTHALService();      else       return UartHalService;   }   public int uartRead(int fd, byte[] buf,int len)   {    return uart_read_Java(fd, buf, len);   }   public int uartWrite(int fd, byte[] data)   {     return uart_write_Java(fd, data);    }}