Java关键字

时间：2014-05-26 18:22:17 阅读：271 评论：0 收藏：0 [点我收藏+]

1 Java关键字

根据官网说明，java有如下关键字。

http://docs.oracle.com/javase/tutorial/java/nutsandbolts/_keywords.html

Here is a list of keywords in the Java programming language. You cannot use any of the following as identifiers in your programs. The keywords const and gotoare reserved, even though they are not currently used. true, false, and null might seem like keywords, but they are actually literals; you cannot use them as identifiers in your programs.

`abstract`	`continue`	`for`	`new`	`switch`
`assert`^***	`default`	`goto`^*	`package`	`synchronized`
`boolean`	`do`	`if`	`private`	`this`
`break`	`double`	`implements`	`protected`	`throw`
`byte`	`else`	`import`	`public`	`throws`
`case`	`enum`^****	`instanceof`	`return`	`transient`
`catch`	`extends`	`int`	`short`	`try`
`char`	`final`	`interface`	`static`	`void`
`class`	`finally`	`long`	`strictfp`^**	`volatile`
`const`^*	`float`	`native`	`super`	`while`

^*		not used
^**		added in 1.2
^***		added in 1.4
^****		added in 5.0

需要说明的是，true、false和null不是关键字，但也不能当标识符用。

2 关键字分类

关键字可以分为以下几类：

http://www.java3z.com/cwbwebhome/article/article8/81253.html?id=2799

2.1 访问控制

private 私有的
protected 受保护的
public 公共的

2.2 类、方法和变量修饰符

abstract 声明抽象
class 类
extends 扩允,继承
final 终极,不可改变的
implements实现
interface 接口
native 本地
new 新,创建
static 静态
strictfp 严格,精准
synchronized 线程,同步
transient 短暂
volatile 易失