一、定义
- Java自己保留的一些单词，作为特殊功能的，例如：public、class、byte、short、int、long…
- 不能用来作为类名或者是变量名称，否则报错
二、包含
| abstract | assert | boolean | break | byte |
|---|---|---|---|---|
| case | catch | char | class | const |
| continue | default | do | double | else |
| eum | extends | final | finally | float |
| for | goto | if | implements | import |
| instanceof | int | interface | long | native |
| new | package | private | protected | public |
| return | strictfp | short | static | super |
| switch | synchronized | this | throw | throws |
| transient | try | void | volatile | while |
