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## java.lang.reflect
Class AccessibleObject

    java.lang.Object
      java.lang.reflect.AccessibleObject

Direct Known Subclasses:
  Constructor, Field, Method

public class AccessibleObject
extends Object

The AccessibleObject class is the base class for Field, Method and Constructor objects. It provides the ability to flag a reflected object as suppressing default Java language access control checks when it is used. The access checks--for public, default (package) access, protected, and private members--are performed when Fields, Methods or Constructors are used to set or get fields, to invoke methods, or to create and initialize new instances of classes, respectively.

Setting the `accessible` flag in a reflected object permits sophisticated applications with sufficient privilege, such as Java Object Serialization or other persistence mechanisms, to manipulate objects in a manner that would normally be prohibited.

Since:
  1.2
See Also:
  `Field`, `Method`, `Constructor`, `ReflectPermission`

Constructor Summary
`protected` | `AccessibleObject()` Constructor: only used by the Java Virtual Machine.

Method Summary
`boolean` | `isAccessible()` Get the value of the `accessible` flag for this object.
`static void` | `setAccessible(AccessibleObject[] array, boolean flag)` Convenience method to set the `accessible` flag for an array of objects with a single security check (for efficiency).
`void` | `setAccessible(boolean flag)` Set the `accessible` flag for this object to the indicated boolean value.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### AccessibleObject

    protected AccessibleObject()

  Constructor: only used by the Java Virtual Machine.

Method Detail

### setAccessible

    public static void setAccessible(AccessibleObject[] array,
                                     boolean flag)
                              throws SecurityException

  Convenience method to set the `accessible` flag for an array of objects with a single security check (for efficiency).

  First, if there is a security manager, its `checkPermission` method is called with a `ReflectPermission("suppressAccessChecks")` permission.

  A `SecurityException` is raised if `flag` is `true` but accessibility of any of the elements of the input `array` may not be changed (for example, if the element object is a `Constructor` object for the class `Class`). In the event of such a SecurityException, the accessiblity of objects is set to `flag` for array elements upto (and excluding) the element for which the exception occurred; the accessiblity of elements beyond (and including) the element for which the exception occurred is unchanged.

  Parameters:
    `array` - the array of AccessibleObjects
    `flag` - the new value for the `accessible` flag in each object
  Throws:
    `SecurityException` - if the request is denied.
  See Also:
    `SecurityManager.checkPermission(java.security.Permission)`, `RuntimePermission`

### setAccessible

    public void setAccessible(boolean flag)
                       throws SecurityException

  Set the `accessible` flag for this object to the indicated boolean value. A value of `true` indicates that the reflected object should suppress Java language access checking when it is used. A value of `false` indicates that the reflected object should enforce Java language access checks.

  First, if there is a security manager, its `checkPermission` method is called with a `ReflectPermission("suppressAccessChecks")` permission.

  A `SecurityException` is raised if `flag` is `true` but accessibility of this object may not be changed (for example, if this element object is a `Constructor` object for the class `Class`).

  A `SecurityException` is raised if this object is a `Constructor` object for the class `java.lang.Class`, and `flag` is true.

  Parameters:
    `flag` - the new value for the `accessible` flag
  Throws:
    `SecurityException` - if the request is denied.
  See Also:
    `SecurityManager.checkPermission(java.security.Permission)`, `RuntimePermission`

### isAccessible

    public boolean isAccessible()

  Get the value of the `accessible` flag for this object.

  Returns:
    the value of the object's `accessible` flag

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.