单行注释以“//” 开始;多行注释以 “/*” 开始,以“*/”结束;文档注释以 “/**” 开始,以“*/”结束。
// 单行注释 /* 多行注释 */ /** * 文档注释 */
Java中所有组成部分都需要名字。类名、方法名以及变量名都被称为标识符
abstract assert boolean break byte case catch char class const continue default do double else enum extends final finally float for goto if implements import instanceof int interface long native new package frivate protected public return strictfp short static super switch synchronized this throw throws transient try void volatile while
abstract | assert | boolean | break | byte |
---|---|---|---|---|
case | catch | char | class | const |
continue | default | do | double | else |
enum | extends | final | finally | float |
for | goto | if | implements | import |
instanceof | int | interface | long | native |
new | package | frivate | protected | public |
return | strictfp | short | static | super |
switch | synchronized | this | throw | throws |
transient | try | void | volatile | while |