Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Protected Ctors](https://developer.android.com/reference/java/lang/reflect/AccessibleObject#proctors) \| [Methods](https://developer.android.com/reference/java/lang/reflect/AccessibleObject#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/lang/reflect/AccessibleObject#inhmethods)

# AccessibleObject

` public class AccessibleObject `   
` extends https://developer.android.com/reference/java/lang/Object ` ` implements https://developer.android.com/reference/java/lang/reflect/AnnotatedElement `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | java.lang.reflect.AccessibleObject |

Known direct subclasses [Executable](https://developer.android.com/reference/java/lang/reflect/Executable), [Field](https://developer.android.com/reference/java/lang/reflect/Field) [Executable](https://developer.android.com/reference/java/lang/reflect/Executable) A shared superclass for the common functionality of `https://developer.android.com/reference/java/lang/reflect/Method` and `https://developer.android.com/reference/java/lang/reflect/Constructor`. [Field](https://developer.android.com/reference/java/lang/reflect/Field) A `Field` provides information about, and dynamic access to, a single field of a class or an interface. Known indirect subclasses [Constructor](https://developer.android.com/reference/java/lang/reflect/Constructor)\<T\>, [Method](https://developer.android.com/reference/java/lang/reflect/Method) [Constructor](https://developer.android.com/reference/java/lang/reflect/Constructor)\<T\> `Constructor` provides information about, and access to, a single constructor for a class. [Method](https://developer.android.com/reference/java/lang/reflect/Method) A `Method` provides information about, and access to, a single method on a class or interface.   

*** ** * ** ***

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.

By default, a reflected object is *not* accessible.
**See also:**

- `https://developer.android.com/reference/java/lang/reflect/Field`
- `https://developer.android.com/reference/java/lang/reflect/Method`
- `https://developer.android.com/reference/java/lang/reflect/Constructor`
- `https://developer.android.com/reference/java/lang/reflect/ReflectPermission`

## Summary

| ### Protected constructors ||
|---|---|
| ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#AccessibleObject()() ` Constructor: only used by the Java Virtual Machine. |

| ### Public methods ||
|---|---|
| ` <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#getAnnotation(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) ` Returns this element's annotation for the specified type if such an annotation is *present*, else null. |
| ` https://developer.android.com/reference/java/lang/annotation/Annotation` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#getAnnotations()() ` Returns annotations that are *present* on this element. |
| ` <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T[]` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#getAnnotationsByType(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) ` Returns annotations that are *associated* with this element. |
| ` <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#getDeclaredAnnotation(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) ` Returns this element's annotation for the specified type if such an annotation is *directly present*, else null. |
| ` https://developer.android.com/reference/java/lang/annotation/Annotation` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#getDeclaredAnnotations()() ` Returns annotations that are *directly present* on this element. |
| ` <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T[]` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#getDeclaredAnnotationsByType(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) ` Returns this element's annotation(s) for the specified type if such annotations are either *directly present* or *indirectly present*. |
| ` boolean` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#isAccessible()() ` Get the value of the `accessible` flag for this object. |
| ` boolean` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#isAnnotationPresent(java.lang.Class<?%20extends%20java.lang.annotation.Annotation>)(https://developer.android.com/reference/java/lang/Class<? extends https://developer.android.com/reference/java/lang/annotation/Annotation> annotationClass) ` Returns true if an annotation for the specified type is *present* on this element, else false. |
| ` void` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#setAccessible(boolean)(boolean flag) ` Set the `accessible` flag for this object to the indicated boolean value. |
| ` static void` | ` https://developer.android.com/reference/java/lang/reflect/AccessibleObject#setAccessible(java.lang.reflect.AccessibleObject[],%20boolean)(https://developer.android.com/reference/java/lang/reflect/AccessibleObject array, boolean flag) ` Convenience method to set the `accessible` flag for an array of objects with a single security check (for efficiency). |

### Inherited methods

From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` https://developer.android.com/reference/java/lang/Object#finalize()() `

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
` final https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.
From interface ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement ` ` abstract <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getAnnotation(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) `

Returns this element's annotation for the specified type if such an annotation is *present*, else null.
` abstract https://developer.android.com/reference/java/lang/annotation/Annotation` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getAnnotations()() `

Returns annotations that are *present* on this element.
` default <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T[]` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getAnnotationsByType(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) `

Returns annotations that are *associated* with this element.
` default <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getDeclaredAnnotation(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) `

Returns this element's annotation for the specified type if such an annotation is *directly present*, else null.
` abstract https://developer.android.com/reference/java/lang/annotation/Annotation` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getDeclaredAnnotations()() `

Returns annotations that are *directly present* on this element.
` default <T extends https://developer.android.com/reference/java/lang/annotation/Annotation> T[]` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getDeclaredAnnotationsByType(java.lang.Class<T>)(https://developer.android.com/reference/java/lang/Class<T> annotationClass) `

Returns this element's annotation(s) for the specified type if such annotations are either *directly present* or *indirectly present*.
` default boolean` ` https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#isAnnotationPresent(java.lang.Class<?%20extends%20java.lang.annotation.Annotation>)(https://developer.android.com/reference/java/lang/Class<? extends https://developer.android.com/reference/java/lang/annotation/Annotation> annotationClass) `

Returns true if an annotation for the specified type is *present* on this element, else false.

## Protected constructors

### AccessibleObject

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
protected AccessibleObject ()
```

Constructor: only used by the Java Virtual Machine.

<br />

## Public methods

### getAnnotation

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public T getAnnotation (Class<T> annotationClass)
```

Returns this element's annotation for the specified type if such an annotation is *present*, else null.

<br />

| Parameters ||
|---|---|
| `annotationClass` | `Class`: the Class object corresponding to the annotation type <br /> |

| Returns ||
|---|---|
| `T` | this element's annotation for the specified annotation type if present on this element, else null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` |   |

### getAnnotations

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Annotation[] getAnnotations ()
```

Returns annotations that are *present* on this element. If there are no annotations *present* on this element, the return value is an array of length 0. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/annotation/Annotation` | annotations present on this element <br /> |

### getAnnotationsByType

Added in [API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public T[] getAnnotationsByType (Class<T> annotationClass)
```

Returns annotations that are *associated* with this element. If there are no annotations *associated* with this element, the return value is an array of length 0. The difference between this method and `https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getAnnotation(java.lang.Class<T>)` is that this method detects if its argument is a *repeatable annotation type* (JLS 9.6), and if so, attempts to find one or more annotations of that type by "looking through" a container annotation. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.

<br />

| Parameters ||
|---|---|
| `annotationClass` | `Class`: the Class object corresponding to the annotation type <br /> |

| Returns ||
|---|---|
| `T[]` | all this element's annotations for the specified annotation type if associated with this element, else an array of length zero <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` |   |

### getDeclaredAnnotation

Added in [API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public T getDeclaredAnnotation (Class<T> annotationClass)
```

Returns this element's annotation for the specified type if such an annotation is *directly present*, else null. This method ignores inherited annotations. (Returns null if no annotations are directly present on this element.)

<br />

| Parameters ||
|---|---|
| `annotationClass` | `Class`: the Class object corresponding to the annotation type <br /> |

| Returns ||
|---|---|
| `T` | this element's annotation for the specified annotation type if directly present on this element, else null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` |   |

### getDeclaredAnnotations

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Annotation[] getDeclaredAnnotations ()
```

Returns annotations that are *directly present* on this element. This method ignores inherited annotations. If there are no annotations *directly present* on this element, the return value is an array of length 0. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/annotation/Annotation` | annotations directly present on this element <br /> |

### getDeclaredAnnotationsByType

Added in [API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public T[] getDeclaredAnnotationsByType (Class<T> annotationClass)
```

Returns this element's annotation(s) for the specified type if such annotations are either *directly present* or *indirectly present* . This method ignores inherited annotations. If there are no specified annotations directly or indirectly present on this element, the return value is an array of length 0. The difference between this method and `https://developer.android.com/reference/java/lang/reflect/AnnotatedElement#getDeclaredAnnotation(java.lang.Class<T>)` is that this method detects if its argument is a *repeatable annotation type* (JLS 9.6), and if so, attempts to find one or more annotations of that type by "looking through" a container annotation if one is present. The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.

<br />

| Parameters ||
|---|---|
| `annotationClass` | `Class`: the Class object corresponding to the annotation type <br /> |

| Returns ||
|---|---|
| `T[]` | all this element's annotations for the specified annotation type if directly or indirectly present on this element, else an array of length zero <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` |   |

### isAccessible

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean isAccessible ()
```

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

<br />

| Returns ||
|---|---|
| `boolean` | the value of the object's `accessible` flag <br /> |

### isAnnotationPresent

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean isAnnotationPresent (Class<? extends Annotation> annotationClass)
```

Returns true if an annotation for the specified type is *present* on this element, else false. This method is designed primarily for convenient access to marker annotations.

The truth value returned by this method is equivalent to: `getAnnotation(annotationClass) != null`

The body of the default method is specified to be the code above.

<br />

| Parameters ||
|---|---|
| `annotationClass` | `Class`: the Class object corresponding to the annotation type <br /> |

| Returns ||
|---|---|
| `boolean` | true if an annotation for the specified annotation type is present on this element, else false <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` |   |

### setAccessible

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void setAccessible (boolean flag)
```

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 `https://developer.android.com/reference/java/lang/reflect/Constructor` object for the class `https://developer.android.com/reference/java/lang/Class`).

A `SecurityException` is raised if this object is a `https://developer.android.com/reference/java/lang/reflect/Constructor` object for the class `java.lang.Class`, and `flag` is true.

<br />

| Parameters ||
|---|---|
| `flag` | `boolean`: the new value for the `accessible` flag <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/SecurityException` | if the request is denied. |

**See also:**

- `https://developer.android.com/reference/java/lang/SecurityManager#checkPermission(java.security.Permission)`
- `https://developer.android.com/reference/java/lang/RuntimePermission`

### setAccessible

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public 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).

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 `https://developer.android.com/reference/java/lang/reflect/Constructor` object for the class `https://developer.android.com/reference/java/lang/Class`). In the event of such a SecurityException, the accessibility of objects is set to `flag` for array elements upto (and excluding) the element for which the exception occurred; the accessibility of elements beyond (and including) the element for which the exception occurred is unchanged.

<br />

| Parameters ||
|---|---|
| `array` | `AccessibleObject`: the array of AccessibleObjects <br /> |
| `flag` | `boolean`: the new value for the `accessible` flag in each object <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/SecurityException` | if the request is denied. |

**See also:**

- `https://developer.android.com/reference/java/lang/SecurityManager#checkPermission(java.security.Permission)`
- `https://developer.android.com/reference/java/lang/RuntimePermission`