* #### setAccessible
public void setAccessible(boolean flag)
Set the `accessible` flag for this reflected object to the indicated boolean value. A value of `true` indicates that the reflected object should suppress checks for Java language access control when it is used. A value of `false` indicates that the reflected object should enforce checks for Java language access control when it is used, with the variation noted in the class description.
This method may be used by a caller in class `C` to enable access to a [member](../../../java/lang/reflect/Member.html "interface in java.lang.reflect") of [declaring class](../../../java/lang/reflect/Member.html#getDeclaringClass--) `D` if any of the following hold:
* `C` and `D` are in the same module.
* The member is `public` and `D` is `public` in a package that the module containing `D` [exports](../../../java/lang/Module.html#isExported-java.lang.String-java.lang.Module-) to at least the module containing `C`.
* The member is `protected` `static`, `D` is`public` in a package that the module containing `D` exports to at least the module containing `C`, and `C` is a subclass of `D`.
* `D` is in a package that the module containing `D` [opens](../../../java/lang/Module.html#isOpen-java.lang.String-java.lang.Module-) to at least the module containing `C`. All packages in unnamed and open modules are open to all modules and so this method always succeeds when `D` is in an unnamed or open module.
This method cannot be used to enable access to private members, members with default (package) access, protected instance members, or protected constructors when the declaring class is in a different module to the caller and the package containing the declaring class is not open to the caller's module.
If there is a security manager, its`checkPermission` method is first called with a`ReflectPermission("suppressAccessChecks")` permission.
Overrides:
`[setAccessible](../../../java/lang/reflect/AccessibleObject.html#setAccessible-boolean-)` in class `[AccessibleObject](../../../java/lang/reflect/AccessibleObject.html "class in java.lang.reflect")`
Parameters:
`flag` \- the new value for the `accessible` flag
Throws:
`[InaccessibleObjectException](../../../java/lang/reflect/InaccessibleObjectException.html "class in java.lang.reflect")` \- if access cannot be enabled
`[SecurityException](../../../java/lang/SecurityException.html "class in java.lang")` \- if the request is denied by the security manager
See Also:
[AccessibleObject.trySetAccessible()](../../../java/lang/reflect/AccessibleObject.html#trySetAccessible--), [MethodHandles.privateLookupIn(java.lang.Class<?>, java.lang.invoke.MethodHandles.Lookup)](../../../java/lang/invoke/MethodHandles.html#privateLookupIn-java.lang.Class-java.lang.invoke.MethodHandles.Lookup-)
* #### getDeclaringClass
public [Class](../../../java/lang/Class.html "class in java.lang")<?> getDeclaringClass()
Returns the `Class` object representing the class or interface that declares the field represented by this `Field` object.
Specified by:
`[getDeclaringClass](../../../java/lang/reflect/Member.html#getDeclaringClass--)` in interface `[Member](../../../java/lang/reflect/Member.html "interface in java.lang.reflect")`
Returns:
an object representing the declaring class of the underlying member
* #### getName
public [String](../../../java/lang/String.html "class in java.lang") getName()
Returns the name of the field represented by this `Field` object.
Specified by:
`[getName](../../../java/lang/reflect/Member.html#getName--)` in interface `[Member](../../../java/lang/reflect/Member.html "interface in java.lang.reflect")`
Returns:
the simple name of the underlying member
* #### getModifiers
public int getModifiers()
Returns the Java language modifiers for the field represented by this `Field` object, as an integer. The `Modifier` class should be used to decode the modifiers.
Specified by:
`[getModifiers](../../../java/lang/reflect/Member.html#getModifiers--)` in interface `[Member](../../../java/lang/reflect/Member.html "interface in java.lang.reflect")`
Returns:
the Java language modifiers for the underlying member
See Also:
[Modifier](../../../java/lang/reflect/Modifier.html "class in java.lang.reflect")
* #### isEnumConstant
public boolean isEnumConstant()
Returns `true` if this field represents an element of an enumerated type; returns `false` otherwise.
Returns:
`true` if and only if this field represents an element of an enumerated type.
Since:
1.5
* #### isSynthetic
public boolean isSynthetic()
Returns `true` if this field is a synthetic field; returns `false` otherwise.
Specified by:
`[isSynthetic](../../../java/lang/reflect/Member.html#isSynthetic--)` in interface `[Member](../../../java/lang/reflect/Member.html "interface in java.lang.reflect")`
Returns:
true if and only if this field is a synthetic field as defined by the Java Language Specification.
Since:
1.5
* #### getType
public [Class](../../../java/lang/Class.html "class in java.lang")<?> getType()
Returns a `Class` object that identifies the declared type for the field represented by this`Field` object.
Returns:
a `Class` object identifying the declared type of the field represented by this object
* #### getGenericType
public [Type](../../../java/lang/reflect/Type.html "interface in java.lang.reflect") getGenericType()
Returns a `Type` object that represents the declared type for the field represented by this `Field` object.
If the `Type` is a parameterized type, the`Type` object returned must accurately reflect the actual type parameters used in the source code.
If the type of the underlying field is a type variable or a parameterized type, it is created. Otherwise, it is resolved.
Returns:
a `Type` object that represents the declared type for the field represented by this `Field` object
Throws:
`[GenericSignatureFormatError](../../../java/lang/reflect/GenericSignatureFormatError.html "class in java.lang.reflect")` \- if the generic field signature does not conform to the format specified inThe Java™ Virtual Machine Specification
`[TypeNotPresentException](../../../java/lang/TypeNotPresentException.html "class in java.lang")` \- if the generic type signature of the underlying field refers to a non-existent type declaration
`[MalformedParameterizedTypeException](../../../java/lang/reflect/MalformedParameterizedTypeException.html "class in java.lang.reflect")` \- if the generic signature of the underlying field refers to a parameterized type that cannot be instantiated for any reason
Since:
1.5
* #### equals
public boolean equals([Object](../../../java/lang/Object.html "class in java.lang") obj)
Compares this `Field` against the specified object. Returns true if the objects are the same. Two `Field` objects are the same if they were declared by the same class and have the same name and type.
Overrides:
`[equals](../../../java/lang/Object.html#equals-java.lang.Object-)` in class `[Object](../../../java/lang/Object.html "class in java.lang")`
Parameters:
`obj` \- the reference object with which to compare.
Returns:
`true` if this object is the same as the obj argument; `false` otherwise.
See Also:
[Object.hashCode()](../../../java/lang/Object.html#hashCode--), [HashMap](../../../java/util/HashMap.html "class in java.util")
* #### hashCode
public int hashCode()
Returns a hashcode for this `Field`. This is computed as the exclusive-or of the hashcodes for the underlying field's declaring class name and its name.
Overrides:
`[hashCode](../../../java/lang/Object.html#hashCode--)` in class `[Object](../../../java/lang/Object.html "class in java.lang")`
Returns:
a hash code value for this object.
See Also:
[Object.equals(java.lang.Object)](../../../java/lang/Object.html#equals-java.lang.Object-), [System.identityHashCode(java.lang.Object)](../../../java/lang/System.html#identityHashCode-java.lang.Object-)
* #### toString
public [String](../../../java/lang/String.html "class in java.lang") toString()
Returns a string describing this `Field`. The format is the access modifiers for the field, if any, followed by the field type, followed by a space, followed by the fully-qualified name of the class declaring the field, followed by a period, followed by the name of the field. For example:
public static final int java.lang.Thread.MIN_PRIORITY
private int java.io.FileDescriptor.fd
The modifiers are placed in canonical order as specified by "The Java Language Specification". This is `public`,`protected` or `private` first, and then other modifiers in the following order: `static`, `final`,`transient`, `volatile`.
Overrides:
`[toString](../../../java/lang/Object.html#toString--)` in class `[Object](../../../java/lang/Object.html "class in java.lang")`
Returns:
a string describing this `Field`
See The Java™ Language Specification:
8.3.1 Field Modifiers
* #### toGenericString
public [String](../../../java/lang/String.html "class in java.lang") toGenericString()
Returns a string describing this `Field`, including its generic type. The format is the access modifiers for the field, if any, followed by the generic field type, followed by a space, followed by the fully-qualified name of the class declaring the field, followed by a period, followed by the name of the field.
The modifiers are placed in canonical order as specified by "The Java Language Specification". This is `public`,`protected` or `private` first, and then other modifiers in the following order: `static`, `final`,`transient`, `volatile`.
Returns:
a string describing this `Field`, including its generic type
Since:
1.5
See The Java™ Language Specification:
8.3.1 Field Modifiers
* #### get
public [Object](../../../java/lang/Object.html "class in java.lang") get([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Returns the value of the field represented by this `Field`, on the specified object. The value is automatically wrapped in an object if it has a primitive type.
The underlying field's value is obtained as follows:
If the underlying field is a static field, the `obj` argument is ignored; it may be null.
Otherwise, the underlying field is an instance field. If the specified `obj` argument is null, the method throws a`NullPointerException`. If the specified object is not an instance of the class or interface declaring the underlying field, the method throws an `IllegalArgumentException`.
If this `Field` object is enforcing Java language access control, and the underlying field is inaccessible, the method throws an`IllegalAccessException`. If the underlying field is static, the class that declared the field is initialized if it has not already been initialized.
Otherwise, the value is retrieved from the underlying instance or static field. If the field has a primitive type, the value is wrapped in an object before being returned, otherwise it is returned as is.
If the field is hidden in the type of `obj`, the field's value is obtained according to the preceding rules.
Parameters:
`obj` \- object from which the represented field's value is to be extracted
Returns:
the value of the represented field in object`obj`; primitive values are wrapped in an appropriate object before being returned
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof).
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
* #### getBoolean
public boolean getBoolean([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance `boolean` field.
Parameters:
`obj` \- the object to extract the `boolean` value from
Returns:
the value of the `boolean` field
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `boolean` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getByte
public byte getByte([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance `byte` field.
Parameters:
`obj` \- the object to extract the `byte` value from
Returns:
the value of the `byte` field
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `byte` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getChar
public char getChar([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance field of type`char` or of another primitive type convertible to type `char` via a widening conversion.
Parameters:
`obj` \- the object to extract the `char` value from
Returns:
the value of the field converted to type `char`
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `char` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getShort
public short getShort([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance field of type`short` or of another primitive type convertible to type `short` via a widening conversion.
Parameters:
`obj` \- the object to extract the `short` value from
Returns:
the value of the field converted to type `short`
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `short` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getInt
public int getInt([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance field of type`int` or of another primitive type convertible to type `int` via a widening conversion.
Parameters:
`obj` \- the object to extract the `int` value from
Returns:
the value of the field converted to type `int`
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `int` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getLong
public long getLong([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance field of type`long` or of another primitive type convertible to type `long` via a widening conversion.
Parameters:
`obj` \- the object to extract the `long` value from
Returns:
the value of the field converted to type `long`
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `long` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getFloat
public float getFloat([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance field of type`float` or of another primitive type convertible to type `float` via a widening conversion.
Parameters:
`obj` \- the object to extract the `float` value from
Returns:
the value of the field converted to type `float`
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `float` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### getDouble
public double getDouble([Object](../../../java/lang/Object.html "class in java.lang") obj)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Gets the value of a static or instance field of type`double` or of another primitive type convertible to type `double` via a widening conversion.
Parameters:
`obj` \- the object to extract the `double` value from
Returns:
the value of the field converted to type `double`
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is inaccessible.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type `double` by a widening conversion.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[get(java.lang.Object)](../../../java/lang/reflect/Field.html#get-java.lang.Object-)
* #### set
public void set([Object](../../../java/lang/Object.html "class in java.lang") obj,
[Object](../../../java/lang/Object.html "class in java.lang") value)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the field represented by this `Field` object on the specified object argument to the specified new value. The new value is automatically unwrapped if the underlying field has a primitive type.
The operation proceeds as follows:
If the underlying field is static, the `obj` argument is ignored; it may be null.
Otherwise the underlying field is an instance field. If the specified object argument is null, the method throws a`NullPointerException`. If the specified object argument is not an instance of the class or interface declaring the underlying field, the method throws an `IllegalArgumentException`.
If this `Field` object is enforcing Java language access control, and the underlying field is inaccessible, the method throws an`IllegalAccessException`.
If the underlying field is final, the method throws an`IllegalAccessException` unless `setAccessible(true)` has succeeded for this `Field` object and the field is non-static. Setting a final field in this way is meaningful only during deserialization or reconstruction of instances of classes with blank final fields, before they are made available for access by other parts of a program. Use in any other context may have unpredictable effects, including cases in which other parts of a program continue to use the original value of this field.
If the underlying field is of a primitive type, an unwrapping conversion is attempted to convert the new value to a value of a primitive type. If this attempt fails, the method throws an`IllegalArgumentException`.
If, after possible unwrapping, the new value cannot be converted to the type of the underlying field by an identity or widening conversion, the method throws an`IllegalArgumentException`.
If the underlying field is static, the class that declared the field is initialized if it has not already been initialized.
The field is set to the possibly unwrapped and widened new value.
If the field is hidden in the type of `obj`, the field's value is set according to the preceding rules.
Parameters:
`obj` \- the object whose field should be modified
`value` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
* #### setBoolean
public void setBoolean([Object](../../../java/lang/Object.html "class in java.lang") obj,
boolean z)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `boolean` on the specified object. This method is equivalent to`set(obj, zObj)`, where `zObj` is a `Boolean` object and`zObj.booleanValue() == z`.
Parameters:
`obj` \- the object whose field should be modified
`z` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setByte
public void setByte([Object](../../../java/lang/Object.html "class in java.lang") obj,
byte b)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `byte` on the specified object. This method is equivalent to`set(obj, bObj)`, where `bObj` is a `Byte` object and`bObj.byteValue() == b`.
Parameters:
`obj` \- the object whose field should be modified
`b` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setChar
public void setChar([Object](../../../java/lang/Object.html "class in java.lang") obj,
char c)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `char` on the specified object. This method is equivalent to`set(obj, cObj)`, where `cObj` is a `Character` object and`cObj.charValue() == c`.
Parameters:
`obj` \- the object whose field should be modified
`c` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setShort
public void setShort([Object](../../../java/lang/Object.html "class in java.lang") obj,
short s)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `short` on the specified object. This method is equivalent to`set(obj, sObj)`, where `sObj` is a `Short` object and`sObj.shortValue() == s`.
Parameters:
`obj` \- the object whose field should be modified
`s` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setInt
public void setInt([Object](../../../java/lang/Object.html "class in java.lang") obj,
int i)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as an `int` on the specified object. This method is equivalent to`set(obj, iObj)`, where `iObj` is an `Integer` object and`iObj.intValue() == i`.
Parameters:
`obj` \- the object whose field should be modified
`i` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setLong
public void setLong([Object](../../../java/lang/Object.html "class in java.lang") obj,
long l)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `long` on the specified object. This method is equivalent to`set(obj, lObj)`, where `lObj` is a `Long` object and`lObj.longValue() == l`.
Parameters:
`obj` \- the object whose field should be modified
`l` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setFloat
public void setFloat([Object](../../../java/lang/Object.html "class in java.lang") obj,
float f)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `float` on the specified object. This method is equivalent to`set(obj, fObj)`, where `fObj` is a `Float` object and`fObj.floatValue() == f`.
Parameters:
`obj` \- the object whose field should be modified
`f` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### setDouble
public void setDouble([Object](../../../java/lang/Object.html "class in java.lang") obj,
double d)
throws [IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang"),
[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")
Sets the value of a field as a `double` on the specified object. This method is equivalent to`set(obj, dObj)`, where `dObj` is a `Double` object and`dObj.doubleValue() == d`.
Parameters:
`obj` \- the object whose field should be modified
`d` \- the new value for the field of `obj` being modified
Throws:
`[IllegalAccessException](../../../java/lang/IllegalAccessException.html "class in java.lang")` \- if this `Field` object is enforcing Java language access control and the underlying field is either inaccessible or final.
`[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified object is null and the field is an instance field.
`[ExceptionInInitializerError](../../../java/lang/ExceptionInInitializerError.html "class in java.lang")` \- if the initialization provoked by this method fails.
See Also:
[set(java.lang.Object, java.lang.Object)](../../../java/lang/reflect/Field.html#set-java.lang.Object-java.lang.Object-)
* #### getAnnotation
public <T extends [Annotation](../../../java/lang/annotation/Annotation.html "interface in java.lang.annotation")> T getAnnotation([Class](../../../java/lang/Class.html "class in java.lang")<T> annotationClass)
Returns this element's annotation for the specified type if such an annotation is _present_, else null.
Specified by:
`[getAnnotation](../../../java/lang/reflect/AnnotatedElement.html#getAnnotation-java.lang.Class-)` in interface `[AnnotatedElement](../../../java/lang/reflect/AnnotatedElement.html "interface in java.lang.reflect")`
Overrides:
`[getAnnotation](../../../java/lang/reflect/AccessibleObject.html#getAnnotation-java.lang.Class-)` in class `[AccessibleObject](../../../java/lang/reflect/AccessibleObject.html "class in java.lang.reflect")`
Type Parameters:
`T` \- the type of the annotation to query for and return if present
Parameters:
`annotationClass` \- the Class object corresponding to the annotation type
Returns:
this element's annotation for the specified annotation type if present on this element, else null
Throws:
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the given annotation class is null
Since:
1.5
* #### getAnnotationsByType
public <T extends [Annotation](../../../java/lang/annotation/Annotation.html "interface in java.lang.annotation")> T[] getAnnotationsByType([Class](../../../java/lang/Class.html "class in java.lang")<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 [AnnotatedElement.getAnnotation(Class)](../../../java/lang/reflect/AnnotatedElement.html#getAnnotation-java.lang.Class-) 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.
Specified by:
`[getAnnotationsByType](../../../java/lang/reflect/AnnotatedElement.html#getAnnotationsByType-java.lang.Class-)` in interface `[AnnotatedElement](../../../java/lang/reflect/AnnotatedElement.html "interface in java.lang.reflect")`
Overrides:
`[getAnnotationsByType](../../../java/lang/reflect/AccessibleObject.html#getAnnotationsByType-java.lang.Class-)` in class `[AccessibleObject](../../../java/lang/reflect/AccessibleObject.html "class in java.lang.reflect")`
Type Parameters:
`T` \- the type of the annotation to query for and return if present
Parameters:
`annotationClass` \- the Class object corresponding to the annotation type
Returns:
all this element's annotations for the specified annotation type if associated with this element, else an array of length zero
Throws:
`[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if the given annotation class is null
Since:
1.8
* #### getDeclaredAnnotations
public [Annotation](../../../java/lang/annotation/Annotation.html "interface in java.lang.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.
Specified by:
`[getDeclaredAnnotations](../../../java/lang/reflect/AnnotatedElement.html#getDeclaredAnnotations--)` in interface `[AnnotatedElement](../../../java/lang/reflect/AnnotatedElement.html "interface in java.lang.reflect")`
Overrides:
`[getDeclaredAnnotations](../../../java/lang/reflect/AccessibleObject.html#getDeclaredAnnotations--)` in class `[AccessibleObject](../../../java/lang/reflect/AccessibleObject.html "class in java.lang.reflect")`
Returns:
annotations directly present on this element
* #### getAnnotatedType
public [AnnotatedType](../../../java/lang/reflect/AnnotatedType.html "interface in java.lang.reflect") getAnnotatedType()
Returns an AnnotatedType object that represents the use of a type to specify the declared type of the field represented by this Field.
Returns:
an object representing the declared type of the field represented by this Field
Since:
1.8