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Showing content from https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/reflect/Parameter.html below:

Parameter (Java SE 21 & JDK 21)

equals public boolean equals(Object obj)

Compares based on the executable and the index.

Overrides:

equals in class Object

Parameters:

obj - The object to compare.

Returns:

Whether or not this is equal to the argument.

See Also:

hashCode

public int hashCode()

Returns a hash code based on the executable's hash code and the index.

Overrides:

hashCode in class Object

Returns:

A hash code based on the executable's hash code.

See Also:

isNamePresent

public boolean isNamePresent()

Returns true if the parameter has a name according to the class file; returns false otherwise. Whether a parameter has a name is determined by the MethodParameters attribute of the method which declares the parameter.

Returns:: true if and only if the parameter has a name according to the class file.

toString

Returns a string describing this parameter. The format is the modifiers for the parameter, if any, in canonical order as recommended by The Java Language Specification, followed by the fully-qualified type of the parameter (excluding the last [] if the parameter is variable arity), followed by "..." if the parameter is variable arity, followed by a space, followed by the name of the parameter.

Overrides:: toString in class Object
Returns:: A string representation of the parameter and associated information.

getDeclaringExecutable

Returns the Executable declaring this parameter.

Returns:: the Executable declaring this parameter

getModifiers

public int getModifiers()

Returns the Java language

modifiers

for the parameter represented by this object.

Returns:

the Java language modifiers for the parameter represented by this object

See Java Language Specification:

8.4.1 Formal Parameters

See Also:

Java programming language and JVM modeling in core reflection

accessFlags

Returns an unmodifiable set of the

access flags

for the parameter represented by this object, possibly empty.

Returns:

an unmodifiable set of the access flags for the parameter represented by this object, possibly empty

See Java Virtual Machine Specification:

4.7.24 The MethodParameters Attribute

Since:

See Also:

getModifiers()

getName

Returns the name of the parameter. If the parameter's name is

present

, then this method returns the name provided by the class file. Otherwise, this method synthesizes a name of the form argN, where N is the index of the parameter in the descriptor of the method which declares the parameter.

Returns:: The name of the parameter, either provided by the class file or synthesized if the class file does not provide a name.

getParameterizedType public Type getParameterizedType

()

Returns a Type object that identifies the parameterized type for the parameter represented by this Parameter object.

Returns:: a Type object identifying the parameterized type of the parameter represented by this object

getType public Class<?> getType

()

Returns a Class object that identifies the declared type for the parameter represented by this Parameter object.

Returns:: a Class object identifying the declared type of the parameter represented by this object

getAnnotatedType

Returns an AnnotatedType object that represents the use of a type to specify the type of the formal parameter represented by this Parameter.

Returns:: an AnnotatedType object representing the use of a type to specify the type of the formal parameter represented by this Parameter

isImplicit

public boolean isImplicit()

Returns true if this parameter is implicitly declared in source code; returns false otherwise.

Returns:: true if and only if this parameter is implicitly declared as defined by The Java Language Specification.

isSynthetic

public boolean isSynthetic()

Returns true if this parameter is neither implicitly nor explicitly declared in source code; returns false otherwise.

Returns:

true if and only if this parameter is a synthetic construct as defined by The Java Language Specification.

See Java Language Specification:

13.1 The Form of a Binary

See Also:

Java programming language and JVM modeling in core reflection

isVarArgs

public boolean isVarArgs()

Returns true if this parameter represents a variable argument list; returns false otherwise.

Returns:: true if an only if this parameter represents a variable argument list.

getAnnotation

Returns this element's annotation for the specified type if such an annotation is

present

, else null.

Note that any annotation returned by this method is a declaration annotation.

Specified by:: getAnnotation in interface AnnotatedElement
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 - if the given annotation class is null

getAnnotationsByType public <T extends Annotation> 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

AnnotatedElement.getAnnotation(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.

Note that any annotations returned by this method are declaration annotations.

Specified by:: getAnnotationsByType in interface AnnotatedElement
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 - if the given annotation class is null

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.

Note that any annotations returned by this method are declaration annotations.

Specified by:: getDeclaredAnnotations in interface AnnotatedElement
Returns:: annotations directly present on this element

getDeclaredAnnotation public <T extends Annotation> 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.)

Note that any annotation returned by this method is a declaration annotation.

Specified by:: getDeclaredAnnotation in interface AnnotatedElement
Type Parameters:: T - the type of the annotation to query for and return if directly present
Parameters:: annotationClass - the Class object corresponding to the annotation type
Returns:: this element's annotation for the specified annotation type if directly present on this element, else null
Throws:: NullPointerException - if the given annotation class is null

getDeclaredAnnotationsByType public <T extends Annotation> T[] getDeclaredAnnotationsByType(Class<T> annotationClass)

Returns this element's annotation(s) for the specified type if such annotations are either

directly present

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

AnnotatedElement.getDeclaredAnnotation(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 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.

Note that any annotations returned by this method are declaration annotations.

Specified by:: getDeclaredAnnotationsByType in interface AnnotatedElement
Type Parameters:: T - the type of the annotation to query for and return if directly or indirectly present
Parameters:: annotationClass - the Class object corresponding to the annotation type
Returns:: all this element's annotations for the specified annotation type if directly or indirectly present on this element, else an array of length zero
Throws:: NullPointerException - if the given annotation class is null

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.

Note that any annotations returned by this method are declaration annotations.

Specified by:: getAnnotations in interface AnnotatedElement
Returns:: annotations present on this element

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