Class, Method, and Variable Modifiers

The following are class, method, or variable modifiers:

·        abstract a method or class that can not be instantiated, and which may define methods to be overwritten.

·        class keyword used to specify a class.

·        extends used to indicate the super-class that a subclass is extending.

·        final makes it impossible to extend a class, override a method, or reinitialize a variable.

·        implements used to indicate the interfaces that a class will use.

·        interface keyword used to specify an interface.

·        native indicates a method is written in a platform-dependant language, such as C.

·        new used to instantiate an object by invoking the constructor method.

·        static makes a method or variable belong to a class.

·        synchronized indicates that a method can be accessed by only one thread at a time.

·        transient indicates which variables are not to have their data written to an ObjectStream.

·        volatile indicates a variable may change out of sync due to its usage in threads.

	Variables	Methods	Classes
Access Modifiers
private	x	x
protected	x	x
none (default)	x	x	x
public	x	x	x
Special Modifiers(Not Access Modifiers)
abstract		x	x
final	x	x	x
native		x
static	x	x	x
synchronized		x	x
transient	x
volatile	x