Java Language Keywords

The Java^TM Tutorial

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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.

Keywords in the Java Language

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

**Keywords in the Java Language**
`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`

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