Java Language Keywords - Java Tutorial 5.0 英文版

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Trail: Learning the Java Language
Lesson: Language Basics

Java Language Keywords

Here's a list of keywords in the Java language. These words are reserved — you cannot use any of these words as names in your programs. true, false, and null are not keywords but they are reserved words, so you cannot use them as names in your programs either.

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

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`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`