Java Keywords

Keywords are words (or sequences of characters, if you want to get technical) that have a specific meaning in Java. You cannot use them as identifiers because they belong to the Java language itself. You may not use any of these reserved words as names of classes, variables, or constants. However, because Java is case sensitive you could, for example, create a class called For, which is not the same thing as for. But this is a very bad idea from the standpoint of readability.

abstract boolean break byte case

cast catch char class const

continue default do double else

extends final finally float for

future generic goto if implements

import inner instanceof int interface

long native new null operator

outer package private protected public

rest return short static super

switch synchronized this throw throws

transient try var void volatile

while

Although they are reserved words, true and false are not listed in the above as keywords. That is because technically they are boolean literals.

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