Java Language Keywords (The Java™ Tutorials > Learning the Java Language

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Java Language Keywords

Here's 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 goto are 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

`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`