Added in API level 1

Field

class Field : AccessibleObject, Member

kotlin.Any
↳	java.lang.reflect.AccessibleObject
	↳	java.lang.reflect.Field

A Field provides information about, and dynamic access to, a single field of a class or an interface. The reflected field may be a class (static) field or an instance field.

A Field permits widening conversions to occur during a get or set access operation, but throws an IllegalArgumentException if a narrowing conversion would occur.

Summary

Inherited constants
From class Member Int DECLARED Identifies the set of declared members of a class or interface. Inherited members are not included. Int PUBLIC Identifies the set of all public members of a class or interface, including inherited members.

Public methods
Boolean	equals(other: Any?) Compares this Field against the specified object.
Any?	get(obj: Any?) Returns the value of the field represented by this Field, on the specified object.
T?	getAnnotation(annotationClass: Class<T>)
Array<T>!	getAnnotationsByType(annotationClass: Class<T>) Returns annotations that are associated with this element.
Boolean	getBoolean(obj: Any?) Gets the value of a static or instance boolean field.
Byte	getByte(obj: Any?) Gets the value of a static or instance byte field.
Char	getChar(obj: Any?) 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.
Array<Annotation!>	getDeclaredAnnotations() Returns annotations that are directly present on this element.
Class<*>	getDeclaringClass() Returns the Class object representing the class or interface that declares the field represented by this Field object.
Double	getDouble(obj: Any?) 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.
Float	getFloat(obj: Any?) 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.
Type	getGenericType() Returns a Type object that represents the declared type for the field represented by this Field object.
Int	getInt(obj: Any?) 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.
Long	getLong(obj: Any?) 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.
Int	getModifiers() Returns the Java language modifiers for the field represented by this Field object, as an integer.
String	getName() Returns the name of the field represented by this Field object.
Short	getShort(obj: Any?) 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.
Class<*>	getType() Returns a Class object that identifies the declared type for the field represented by this Field object.
Int	hashCode() Returns a hashcode for this Field.
Boolean	isAnnotationPresent(annotationType: Class<out Annotation!>)
Boolean	isEnumConstant() Returns true if this field represents an element of an enumerated type; returns false otherwise.
Boolean	isSynthetic() Returns true if this field is a synthetic field; returns false otherwise.
Unit	set(obj: Any?, value: Any?) Sets the field represented by this Field object on the specified object argument to the specified new value.
Unit	setBoolean(obj: Any?, z: Boolean) Sets the value of a field as a boolean on the specified object.
Unit	setByte(obj: Any?, b: Byte) Sets the value of a field as a byte on the specified object.
Unit	setChar(obj: Any?, c: Char) Sets the value of a field as a char on the specified object.
Unit	setDouble(obj: Any?, d: Double) Sets the value of a field as a double on the specified object.
Unit	setFloat(obj: Any?, f: Float) Sets the value of a field as a float on the specified object.
Unit	setInt(obj: Any?, i: Int) Sets the value of a field as an int on the specified object.
Unit	setLong(obj: Any?, l: Long) Sets the value of a field as a long on the specified object.
Unit	setShort(obj: Any?, s: Short) Sets the value of a field as a short on the specified object.
String	toGenericString() Returns a string describing this Field, including its generic type.
String	toString() Returns a string describing this Field.

Inherited functions

From class AccessibleObject Array<Annotation!> getAnnotations() T? getDeclaredAnnotation(annotationClass: Class<T>) Array<T>! getDeclaredAnnotationsByType(annotationClass: Class<T>) Boolean isAccessible() Get the value of the accessible flag for this object. Unit setAccessible(flag: Boolean) 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 java.lang.Class). A SecurityException is raised if this object is a object for the class java.lang.Class, and flag is true. Unit setAccessible(array: Array<AccessibleObject!>!, flag: Boolean) 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 ). 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.

Public methods

equals

Added in API level 1

fun equals(other: Any?): Boolean

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.

Parameters
obj	the reference object with which to compare.

Return
Boolean	true if this object is the same as the obj argument; false otherwise.

get

Added in API level 1

fun get(obj: Any?): Any?

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	Any?: object from which the represented field's value is to be extracted

Return
Any?	the value of the represented field in object obj; primitive values are wrapped in an appropriate object before being returned

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof).
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

getAnnotation

Added in API level 1

fun <T : Annotation!> getAnnotation(annotationClass: Class<T>): T?

Parameters
<T>	the type of the annotation to query for and return if present
annotationClass	Class<T>: the Class object corresponding to the annotation type

Return
T?	this element's annotation for the specified annotation type if present on this element, else null

Exceptions
java.lang.NullPointerException	if the given annotation class is null

getAnnotationsByType

Added in API level 24

fun <T : Annotation!> getAnnotationsByType(annotationClass: Class<T>): Array<T>!

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 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.

Parameters
<T>	the type of the annotation to query for and return if present
annotationClass	Class<T>: the Class object corresponding to the annotation type

Return
Array<T>!	all this element's annotations for the specified annotation type if associated with this element, else an array of length zero

Exceptions
java.lang.NullPointerException	if the given annotation class is null

getBoolean

Added in API level 1

fun getBoolean(obj: Any?): Boolean

Gets the value of a static or instance boolean field.

Parameters
obj	Any?: the object to extract the boolean value from

Return
Boolean	the value of the boolean field

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getByte

Added in API level 1

fun getByte(obj: Any?): Byte

Gets the value of a static or instance byte field.

Parameters
obj	Any?: the object to extract the byte value from

Return
Byte	the value of the byte field

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getChar

Added in API level 1

fun getChar(obj: Any?): Char

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	Any?: the object to extract the char value from

Return
Char	the value of the field converted to type char

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getDeclaredAnnotations

Added in API level 1

fun getDeclaredAnnotations(): Array<Annotation!>

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.

Return
Array<Annotation!>	annotations directly present on this element

getDeclaringClass

Added in API level 1

fun getDeclaringClass(): Class<*>

Returns the Class object representing the class or interface that declares the field represented by this Field object.

Return
Class<*>	an object representing the declaring class of the underlying member

getDouble

Added in API level 1

fun getDouble(obj: Any?): Double

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	Any?: the object to extract the double value from

Return
Double	the value of the field converted to type double

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getFloat

Added in API level 1

fun getFloat(obj: Any?): Float

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	Any?: the object to extract the float value from

Return
Float	the value of the field converted to type float

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getGenericType

Added in API level 1

fun getGenericType(): Type

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.

Return
Type	a Type object that represents the declared type for the field represented by this Field object

Exceptions
java.lang.reflect.GenericSignatureFormatError	if the generic field signature does not conform to the format specified in The Java™ Virtual Machine Specification
java.lang.TypeNotPresentException	if the generic type signature of the underlying field refers to a non-existent type declaration
java.lang.reflect.MalformedParameterizedTypeException	if the generic signature of the underlying field refers to a parameterized type that cannot be instantiated for any reason

getInt

Added in API level 1

fun getInt(obj: Any?): Int

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	Any?: the object to extract the int value from

Return
Int	the value of the field converted to type int

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getLong

Added in API level 1

fun getLong(obj: Any?): Long

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	Any?: the object to extract the long value from

Return
Long	the value of the field converted to type long

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getModifiers

Added in API level 1

fun getModifiers(): Int

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.

Return
Int	the Java language modifiers for the underlying member

See Also

• java.lang.reflect.Modifier

getName

Added in API level 1

fun getName(): String

Returns the name of the field represented by this Field object.

Return
String	the simple name of the underlying member

getShort

Added in API level 1

fun getShort(obj: Any?): Short

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	Any?: the object to extract the short value from

Return
Short	the value of the field converted to type short

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#get

getType

Added in API level 1

fun getType(): Class<*>

Returns a Class object that identifies the declared type for the field represented by this Field object.

Return
Class<*>	a Class object identifying the declared type of the field represented by this object

hashCode

Added in API level 1

fun hashCode(): Int

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.

Return
Int	a hash code value for this object.

isAnnotationPresent

Added in API level 1

fun isAnnotationPresent(annotationType: Class<out Annotation!>): Boolean

Parameters
annotationClass	the Class object corresponding to the annotation type

Return
Boolean	true if an annotation for the specified annotation type is present on this element, else false

Exceptions
java.lang.NullPointerException	if the given annotation class is null

isEnumConstant

Added in API level 1

fun isEnumConstant(): Boolean

Returns true if this field represents an element of an enumerated type; returns false otherwise.

Return
Boolean	true if and only if this field represents an element of an enumerated type.

isSynthetic

Added in API level 1

fun isSynthetic(): Boolean

Returns true if this field is a synthetic field; returns false otherwise.

Return
Boolean	true if and only if this field is a synthetic field as defined by the Java Language Specification.

set

Added in API level 1

fun set(
    obj: Any?, 
    value: Any?
): Unit

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, this Field object has write access if and only if the following conditions are met:

• setAccessible(true) has succeeded for this Field object;
• the field is non-static; and
• the field's declaring class is not a record class.

If any of the above checks is not met, this method throws an IllegalAccessException.

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	Any?: the object whose field should be modified
value	Any?: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

setBoolean

Added in API level 1

fun setBoolean(
    obj: Any?, 
    z: Boolean
): Unit

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	Any?: the object whose field should be modified
z	Boolean: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setByte

Added in API level 1

fun setByte(
    obj: Any?, 
    b: Byte
): Unit

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	Any?: the object whose field should be modified
b	Byte: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setChar

Added in API level 1

fun setChar(
    obj: Any?, 
    c: Char
): Unit

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	Any?: the object whose field should be modified
c	Char: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setDouble

Added in API level 1

fun setDouble(
    obj: Any?, 
    d: Double
): Unit

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	Any?: the object whose field should be modified
d	Double: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setFloat

Added in API level 1

fun setFloat(
    obj: Any?, 
    f: Float
): Unit

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	Any?: the object whose field should be modified
f	Float: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setInt

Added in API level 1

fun setInt(
    obj: Any?, 
    i: Int
): Unit

Sets the value of a field as an int on the specified object. This method is equivalent to set(obj, iObj), where iObj is a Integer object and iObj.intValue() == i.

Parameters
obj	Any?: the object whose field should be modified
i	Int: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setLong

Added in API level 1

fun setLong(
    obj: Any?, 
    l: Long
): Unit

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	Any?: the object whose field should be modified
l	Long: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

setShort

Added in API level 1

fun setShort(
    obj: Any?, 
    s: Short
): Unit

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	Any?: the object whose field should be modified
s	Short: the new value for the field of obj being modified

Exceptions
java.lang.IllegalAccessException	if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException	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.
java.lang.NullPointerException	if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError	if the initialization provoked by this method fails.

See Also

• java.lang.reflect.Field#set

toGenericString

Added in API level 1

fun toGenericString(): String

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.

Return
String	a string describing this Field, including its generic type

toString

Added in API level 1

fun toString(): String

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.

Return
String	a string describing this Field