java界面运行在pc上，write.c载到linux系统的节点上，两者通过串口进行通信。然后在pc上运行test，在界面中输入ttyUSB0,点open按钮，然后点read按钮。接着在节点上./write运行write就能在界面上显示接收到信息。-java interface running on the pc , write.c set to the linux system nodes, which communicate through the serial port with pc.