第一章 Java 语言入门第二章 标识符、关键字和数据类型第三章 运算符、表达式和语句第四章 类、对象、和接口....包括范围广泛.-first chapter Java language portal second chapter identifiers, keywords and data types third chapter Operators, expressions and statements IV category, the targets, and the interface

标识符是开发者定义的用来表示程序中实体名字的有效字符序列-The effective character sequence identifier is used to represent the developer defines the name of the program entities

基于STM32的串口接收GP3D03-ZZ4激光测距模块的程序，采用状态机方式接收，通过判断标识符识别连续发送的串口数据-Based STM32 serial reception GP3D03-ZZ4 laser rangefinder module program, using the state machine receiving mode, by determining the identifier identifying the continuous transmission of se