keyword : Java Glossary

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Java reserves some words. They cannot be used as variable, method or class names.
Java Keywords
abstract do import public throws
boolean double instanceof return transient
break else int short try
byte extends interface static void
case final long strictfp volatile
catch finally native super while
char float new switch  
class for package synchronized  
continue if private this  
default implements protected throw  
Reserved keywords (not currently in use)
const goto      
Reserved Literals
null true false    
assert arrived with JDK 1.4. enum arrived with JDK 1.5. Const and goto are not currently used. They may be there just in case C++ programmers use them by mistake to enable the compiler to give a more meaningful error message.

What keywords Can Be Applied to What

  variable local variable method class inner class code block
public
protected
private
abstract 1
static ²
final 3 4 4
native 5
synchronized
volatile 6
transient
strictfp

Notes

1 - abstract methods cannot have a body.

² - static blocks may not occur inside methods.

3 - final methods cannot be overridden in a subclass. This is not the same as C++ const.

4 - you can’t derive from a final class.

5 - implemented in some other language, usually C, C++ or assembler.

6 - May be asynchronously modified by other threads. Volatile is not a substitute for task synchronization.

Table composed by Razvan.

Learning More

Sun’s Javadoc on Modifier class : available:
abstract
abstract class
boolean
canonical
case
catch
class
double
extends
final
finally
for loop
implements
import
instanceof
interface
Java Cheat Sheet
JNI
keyword ordering
local scope
native
new
package
package scope
private scope
protected scope
public scope
static
strictfp
super
switch
synchronized
this
throw
transient
try
void
volatile
while
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