关键字不能用作变量名或方法名
| Java中的关键字/保留字 | ||||
| abstract | assert | boolean | break | byte |
| case | catch | char | class | const |
| continue | default | do | double | else |
| extends | final | finally | float | for |
| goto | if | implements | import | instanceof |
| int | interface | long | native | new |
| null | package | private | protected | public |
| return | short | static | strictfp | super |
| switch | synchronized | this | throw | throws |
| transient | try | void | volatile | while |
