Section 2.3. Keywords

2.3. Keywords

Table 2-3 contains the Java keywords. Two of them are reserved but not used by the Java language: const and goto. These C++ keywords are included as Java keywords to generate better error messages if they are used in a Java program. Java 5.0 introduced the enum keyword.

Java keywords cannot be used as identifiers in a Java program.

Table 2-3. Java keywords

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

Sometimes true, false, and null literals are mistaken for keywords. They are not keywords; they are reserved literals.