This is a simple calculator based on stack, which accepts + - * / ( ) as operand and integer as number
https://zhuanlan.zhihu.com/p/24393775
https://zhuanlan.zhihu.com/p/24556103
- Scanner in parser: scan chatacter and form token to output to parser
- Gradle project
- Input, InputStream, InputReader(Adapter), Bufferedreader(Decorator)
- Adapter and Decorator
- The effect of Interface and Abstract
- Stack: use operand stack and number stac;