Chapter 13
The java.lang.reflect Package

Modifier

Name

Modifier

Synopsis

Class Name:

java.lang.reflect.Modifier

Superclass:

java.lang.Object

Immediate Subclasses:

None

Interfaces Implemented:

None

Availability:

New as of JDK 1.1

The Modifier class defines a number of constants and static methods that can decode the modifier values returned by the getModifiers() methods of the Class, Constructor, Field, and Method classes. In other words, you can use the methods in this class to determine the modifiers used to declare a class or a member of a class. The constants in the Modifier class specify the bit values used to represent the various modifiers in a modifier value. You can use these constants to test for modifiers if you want to handle the boolean algebra yourself.

Class Summary

public class java.lang.reflect.Modifier extends java.lang.Object {
  // Constants
  public final static int ABSTRACT;
  public final static int FINAL;
  public final static int INTERFACE;
  public final static int NATIVE;
  public final static int PRIVATE;
  public final static int PROTECTED;
  public final static int PUBLIC;
  public final static int STATIC;
  public final static int SYNCHRONIZED;
  public final static int TRANSIENT;
  public final static int VOLATILE;
  // Class Methods
  public static boolean isAbstract(int mod);
  public static boolean isFinal(int mod);
  public static boolean isInterface(int mod);
  public static boolean isNative(int mod);
  public static boolean isPrivate(int mod);
  public static boolean isProtected(int mod);
  public static boolean isPublic(int mod);
  public static boolean isStatic(int mod);
  public static boolean isSynchronized(int mod);
  public static boolean isTransient(int mod);
  public static boolean isVolatile(int mod);
  public static String toString(int mod);
}

Description: A constant that represents the abstract modifier.

FINAL

public final static int FINAL

Description: A constant that represents the final modifier.

INTERFACE

public final static int INTERFACE

Description: A constant that represents the interface keyword.

NATIVE

public final static int NATIVE

Description: A constant that represents the native modifier.

PRIVATE

public final static int PRIVATE

Description: A constant that represents the private modifier.

PROTECTED

public final static int PROTECTED

Description: A constant that represents the protected modifier.

PUBLIC

public final static int PUBLIC

Description: A constant that represents the public modifier.

STATIC

public final static int STATIC

Description: A constant that represents the static modifier.

SYNCHRONIZED

public final static int SYNCHRONIZED

Description: A constant that represents the synchronized modifier.

TRANSIENT

public final static int TRANSIENT

Description: A constant that represents the transient modifier.

VOLATILE

public final static int VOLATILE

Description: A constant that represents the volatile modifier.

mod: The modifier value to test.

Returns

true if the given modifier value includes the abstract modifier; false otherwise.

Description

This method tests the given modifier value for the ABSTRACT constant.

isFinal

public static boolean isFinal(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the final modifier; false otherwise.

Description

This method tests the given modifier value for the FINAL constant.

isInterface

public static boolean isInterface(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the interface keyword; false otherwise.

Description

This method tests the given modifier value for the INTERFACE constant.

isNative

public static boolean isNative(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the native modifier; false otherwise.

Description

This method tests the given modifier value for the NATIVE constant.

isPrivate

public static boolean isPrivate(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the private modifier; false otherwise.

Description

This method tests the given modifier value for the PRIVATE constant.

isProtected

public static boolean isProtected(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the protected modifier; false otherwise.

Description

This method tests the given modifier value for the PROTECTED constant.

isPublic

public static boolean isPublic(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the public modifier; false otherwise.

Description

This method tests the given modifier value for the PUBLIC constant.

isStatic

public static boolean isStatic(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the static modifier; false otherwise.

Description

This method tests the given modifier value for the STATIC constant.

isSynchronized

public static boolean isSynchronized(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the synchronized modifier; false otherwise.

Description

This method tests the given modifier value for the SYNCHRONIZED constant.

isTransient

public static boolean isTransient(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the transient modifier; false otherwise.

Description

This method tests the given modifier value for the TRANSIENT constant.

isVolatile

public static boolean isVolatile(int mod)

Parameters

mod: The modifier value to test.

Returns

true if the given modifier value includes the volatile modifier; false otherwise.

Description

This method tests the given modifier value for the VOLATILE constant.

toString

public static String toString(int mod)

Parameters

mod: The modifier value to represent as a string.

Returns

A string representation of the given modifier value.

Description

This method returns a string that represents the given modifier value. This string contains all of the modifiers specified by the given modifier value.

Inherited Methods

Method	Inherited From	Method	Inherited From
`clone()`	`Object`	`equals(Object)`	`Object`
`finalize()`	`Object`	`getClass()`	`Object`
`hashCode()`	`Object`	`notify()`	`Object`
`notifyAll()`	`Object`	`toString()`	`Object`
`wait()`	`Object`	`wait(long)`	`Object`
`wait(long, int)`	`Object`