OpenJDK 27 · java.lang.reflect.Constructor · APIdia, the JavaDoc alternative

Modifier and Type	Field and Description
private final byte[]	annotations
private final Class<T>	clazz
private ConstructorAccessor	constructorAccessor
private final Class<?>[]	exceptionTypes
private transient volatile ConstructorRepository	genericInfo
private final int	modifiers
private final byte[]	parameterAnnotations
private final Class<?>[]	parameterTypes
private Constructor<T>	root Constructors are mutable due to `AccessibleObject#setAccessible(boolean)`.
private final transient String	signature
private final int	slot

Access	Constructor and Description
pack-priv	Constructor(Class<T> declaringClass, Class<?>[] parameterTypes, Class<?>[] checkedExceptions, int modifiers, int slot, String signature, byte[] annotations, byte[] parameterAnnotations) Package-private constructor used by ReflectAccess to enable instantiation of these objects in Java code from the java.lang package via jdk.internal.access.JavaLangReflectAccess.

Method Summary

Modifier and Type	Method and Description
private ConstructorAccessor	acquireConstructorAccessor()
pack-priv void	appendModifiers(StringBuilder sb) Implements abstract java.lang.reflect.Executable.appendModifiers.
pack-priv void	checkCanSetAccessible(Class<?> caller) Overrides java.lang.reflect.AccessibleObject.checkCanSetAccessible. If the given AccessibleObject is a `Constructor`, `Method` or `Field` then checks that its declaring class is in a package that can be accessed by the given caller of setAccessible.
pack-priv Constructor<T>	copy() Package-private routine (exposed to java.lang.Class via ReflectAccess) which returns a copy of this Constructor.
public boolean	equals(Object obj) Overrides java.lang.Object.equals. Compares this `Constructor` against the specified object.
public AnnotatedType	getAnnotatedReceiverType() Overrides java.lang.reflect.Executable.getAnnotatedReceiverType. Returns an `AnnotatedType` object that represents the use of a type to specify the receiver type of the method/constructor represented by this `Executable` object.
public AnnotatedType	getAnnotatedReturnType() Implements abstract java.lang.reflect.Executable.getAnnotatedReturnType. Returns an `AnnotatedType` object that represents the use of a type to specify the return type of the method/constructor represented by this Executable.
public <T extends Annotation> T	getAnnotation(Class<T> annotationClass) Overrides java.lang.reflect.Executable.getAnnotation. Implements java.lang.reflect.AnnotatedElement.getAnnotation. Returns this element's annotation for the specified type if such an annotation is present, else null.
pack-priv byte[]	getAnnotationBytes() Implements abstract java.lang.reflect.Executable.getAnnotationBytes. Accessor method to allow code sharing
pack-priv ConstructorAccessor	getConstructorAccessor()
public Annotation[]	getDeclaredAnnotations() Overrides java.lang.reflect.Executable.getDeclaredAnnotations. Implements java.lang.reflect.AnnotatedElement.getDeclaredAnnotations. Returns annotations that are directly present on this element.
public Class<T>	getDeclaringClass() Implements abstract java.lang.reflect.Executable.getDeclaringClass. Implements java.lang.reflect.Member.getDeclaringClass. Returns the `Class` object representing the class that declares the constructor represented by this object.
public Class<?>[]	getExceptionTypes() Implements abstract java.lang.reflect.Executable.getExceptionTypes. Returns an array of `Class` objects that represent the types of exceptions declared to be thrown by the underlying executable represented by this object.
private GenericsFactory	getFactory()
public Type[]	getGenericExceptionTypes() Overrides java.lang.reflect.Executable.getGenericExceptionTypes. Returns an array of `Type` objects that represent the exceptions declared to be thrown by this executable object.
pack-priv ConstructorRepository	getGenericInfo() Implements abstract java.lang.reflect.Executable.getGenericInfo.
public Type[]	getGenericParameterTypes() Overrides java.lang.reflect.Executable.getGenericParameterTypes. Returns an array of `Type` objects that represent the formal parameter types, in declaration order, of the executable represented by this object.
public int	getModifiers() Implements abstract java.lang.reflect.Executable.getModifiers. Implements java.lang.reflect.Member.getModifiers. Returns the Java language modifiers for the executable represented by this object.
public String	getName() Implements abstract java.lang.reflect.Executable.getName. Implements java.lang.reflect.Member.getName. Returns the name of this constructor, as a string.
public Annotation[][]	getParameterAnnotations() Implements abstract java.lang.reflect.Executable.getParameterAnnotations. Returns an array of arrays of `Annotation`s that represent the annotations on the formal parameters, in declaration order, of the `Executable` represented by this object.
public int	getParameterCount() Implements abstract java.lang.reflect.Executable.getParameterCount. Returns the number of formal parameters (whether explicitly declared or implicitly declared or neither) for the executable represented by this object.
public Class<?>[]	getParameterTypes() Implements abstract java.lang.reflect.Executable.getParameterTypes. Returns an array of `Class` objects that represent the formal parameter types, in declaration order, of the executable represented by this object.
pack-priv byte[]	getRawAnnotations()
pack-priv byte[]	getRawParameterAnnotations()
pack-priv Constructor<T>	getRoot() Overrides java.lang.reflect.AccessibleObject.getRoot. Returns the root AccessibleObject; or null if this object is the root.
pack-priv Class<?>[]	getSharedExceptionTypes() Implements abstract java.lang.reflect.Executable.getSharedExceptionTypes.
pack-priv Class<?>[]	getSharedParameterTypes() Implements abstract java.lang.reflect.Executable.getSharedParameterTypes.
pack-priv String	getSignature()
pack-priv int	getSlot()
public TypeVariable<Constructor<T>>[]	getTypeParameters() Implements abstract java.lang.reflect.Executable.getTypeParameters. Implements java.lang.reflect.GenericDeclaration.getTypeParameters. Returns an array of `TypeVariable` objects that represent the type variables declared by the generic declaration represented by this `GenericDeclaration` object, in declaration order.
pack-priv boolean	handleParameterNumberMismatch(int resultLength, Class<?>[] parameterTypes) Implements abstract java.lang.reflect.Executable.handleParameterNumberMismatch.
pack-priv boolean	hasGenericInformation() Implements abstract java.lang.reflect.Executable.hasGenericInformation. Does the Executable have generic information.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hashcode for this `Constructor`.
public boolean	isSynthetic() Overrides java.lang.reflect.Executable.isSynthetic. Implements java.lang.reflect.Member.isSynthetic. Returns `true` if this executable is a synthetic construct; returns `false` otherwise.
public boolean	isVarArgs() Overrides java.lang.reflect.Executable.isVarArgs. Returns `true` if this executable was declared to take a variable number of arguments; returns `false` otherwise.
public T	Returns: a new object created by calling the constructor this object represents newInstance(Object... array of objects to be passed as arguments to the constructor call; values of primitive types are wrapped in a wrapper object of the appropriate type (e.g. a `float` in a `Float`) initargs) Uses the constructor represented by this `Constructor` object to create and initialize a new instance of the constructor's declaring class, with the specified initialization parameters.
pack-priv T	newInstanceWithCaller(Object[] args, boolean checkAccess, Class<?> caller)
pack-priv Constructor<T>	newWithAccessor(ConstructorAccessor accessor)
public void	setAccessible(boolean flag) Overrides java.lang.reflect.AccessibleObject.setAccessible. Set the `accessible` flag for this reflected object to the indicated boolean value.
pack-priv void	setConstructorAccessor(ConstructorAccessor accessor)
pack-priv void	specificToGenericStringHeader(StringBuilder sb) Implements abstract java.lang.reflect.Executable.specificToGenericStringHeader. Generate toGenericString header information specific to a method or constructor.
pack-priv void	specificToStringHeader(StringBuilder sb) Implements abstract java.lang.reflect.Executable.specificToStringHeader. Generate toString header information specific to a method or constructor.
public String	Returns: a string describing this `Constructor`, include type parameters toGenericString() Overrides java.lang.reflect.Executable.toGenericString. Returns a string describing this `Constructor`, including type parameters.
pack-priv String	toShortString() Overrides java.lang.reflect.AccessibleObject.toShortString. Returns a short descriptive string to describe this object in log messages.
public String	Returns: a string describing this `Constructor` toString() Overrides java.lang.Object.toString. Returns a string describing this `Constructor`.

Inherited from java.lang.reflect.Executable:: accessFlags equalParamTypes getAllGenericParameterTypes getAnnotatedExceptionTypes getAnnotatedParameterTypes getAnnotatedReturnType0 getAnnotationsByType getParameters getTypeAnnotationBytes getTypeAnnotationBytes0 hasRealParameterData parameterize parseParameterAnnotations sharedGetParameterAnnotations sharedToGenericString sharedToString typeVarBounds

annotations	back to summary
private final byte[] annotations

clazz	back to summary
private final Class<T> clazz

constructorAccessor	back to summary
private ConstructorAccessor constructorAccessor Annotations @Stable

exceptionTypes	back to summary
private final Class<?>[] exceptionTypes

genericInfo	back to summary
private transient volatile ConstructorRepository genericInfo

modifiers	back to summary
private final int modifiers

parameterAnnotations	back to summary
private final byte[] parameterAnnotations

parameterTypes	back to summary
private final Class<?>[] parameterTypes

root	back to summary
private Constructor<T> root Constructors are mutable due to `AccessibleObject#setAccessible(boolean)`. Thus, we return a new copy of a root each time a constructor is returned. Some lazily initialized immutable states can be stored on root and shared to the copies.

signature	back to summary
private final transient String signature

slot	back to summary
private final int slot

Constructor	back to summary
pack-priv Constructor(Class<T> declaringClass, Class<?>[] parameterTypes, Class<?>[] checkedExceptions, int modifiers, int slot, String signature, byte[] annotations, byte[] parameterAnnotations) Package-private constructor used by ReflectAccess to enable instantiation of these objects in Java code from the java.lang package via jdk.internal.access.JavaLangReflectAccess.

Method Detail

acquireConstructorAccessor	back to summary
private ConstructorAccessor acquireConstructorAccessor()

appendModifiers	back to summary
pack-priv void appendModifiers(StringBuilder sb) Implements abstract java.lang.reflect.Executable.appendModifiers. Annotations @Override

appendModifiers

back to summary

pack-priv void appendModifiers(StringBuilder sb)

Implements abstract java.lang.reflect.Executable.appendModifiers.

Annotations

@Override

checkCanSetAccessible back to summary

checkCanSetAccessible	back to summary
pack-priv void checkCanSetAccessible(Class<?> caller) Overrides java.lang.reflect.AccessibleObject.checkCanSetAccessible. Doc from java.lang.reflect.AccessibleObject.checkCanSetAccessible. If the given AccessibleObject is a `Constructor`, `Method` or `Field` then checks that its declaring class is in a package that can be accessed by the given caller of setAccessible. Annotations @Override

pack-priv void checkCanSetAccessible(Class<?> caller)

Overrides java.lang.reflect.AccessibleObject.checkCanSetAccessible.

Doc from java.lang.reflect.AccessibleObject.checkCanSetAccessible.

If the given AccessibleObject is a Constructor, Method or Field then checks that its declaring class is in a package that can be accessed by the given caller of setAccessible.

Annotations

@Override

copy	back to summary
pack-priv Constructor<T> copy() Package-private routine (exposed to java.lang.Class via ReflectAccess) which returns a copy of this Constructor. The copy's "root" field points to this Constructor.

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Compares this `Constructor` against the specified object. Returns true if the objects are the same. Two `Constructor` objects are the same if they were declared by the same class and have the same formal parameter types.

public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Compares this Constructor against the specified object. Returns true if the objects are the same. Two Constructor objects are the same if they were declared by the same class and have the same formal parameter types.

getAnnotatedReceiverType back to summary

getAnnotatedReceiverType	back to summary
public AnnotatedType getAnnotatedReceiverType() Overrides java.lang.reflect.Executable.getAnnotatedReceiverType. Doc from java.lang.reflect.Executable.getAnnotatedReceiverType. Returns an `AnnotatedType` object that represents the use of a type to specify the receiver type of the method/constructor represented by this `Executable` object. The receiver type of a method/constructor is available only if the method/constructor has a receiver parameter (JLS 8.4.1). If this `Executable` object represents an instance method or represents a constructor of an inner member class, and the method/constructor either has no receiver parameter or has a receiver parameter with no annotations on its type, then the return value is an `AnnotatedType` object representing an element with no annotations. If this `Executable` object represents a static method or represents a constructor of a top level, static member, local, or anonymous class, then the return value is null. Annotations @Override Since 1.8

public AnnotatedType getAnnotatedReceiverType()

Overrides java.lang.reflect.Executable.getAnnotatedReceiverType.

Doc from java.lang.reflect.Executable.getAnnotatedReceiverType.

Returns an AnnotatedType object that represents the use of a type to specify the receiver type of the method/constructor represented by this Executable object. The receiver type of a method/constructor is available only if the method/constructor has a receiver parameter (JLS 8.4.1). If this Executable object represents an instance method or represents a constructor of an inner member class, and the method/constructor either has no receiver parameter or has a receiver parameter with no annotations on its type, then the return value is an AnnotatedType object representing an element with no annotations. If this Executable object represents a static method or represents a constructor of a top level, static member, local, or anonymous class, then the return value is null.

Annotations

@Override

Since

1.8

getAnnotatedReturnType back to summary

getAnnotatedReturnType	back to summary
public AnnotatedType getAnnotatedReturnType() Implements abstract java.lang.reflect.Executable.getAnnotatedReturnType. Doc from java.lang.reflect.Executable.getAnnotatedReturnType. Returns an `AnnotatedType` object that represents the use of a type to specify the return type of the method/constructor represented by this Executable. If this `Executable` object represents a constructor, the `AnnotatedType` object represents the type of the constructed object. If this `Executable` object represents a method, the `AnnotatedType` object represents the use of a type to specify the return type of the method. Annotations @Override Since 1.8

public AnnotatedType getAnnotatedReturnType()

Implements abstract java.lang.reflect.Executable.getAnnotatedReturnType.

Doc from java.lang.reflect.Executable.getAnnotatedReturnType.

Returns an AnnotatedType object that represents the use of a type to specify the return type of the method/constructor represented by this Executable. If this Executable object represents a constructor, the AnnotatedType object represents the type of the constructed object. If this Executable object represents a method, the AnnotatedType object represents the use of a type to specify the return type of the method.

Annotations

@Override

Since

1.8

getAnnotation	back to summary
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) Overrides java.lang.reflect.Executable.getAnnotation. Implements java.lang.reflect.AnnotatedElement.getAnnotation. Doc from java.lang.reflect.Executable.getAnnotation. Returns this element's annotation for the specified type if such an annotation is present, else null. Annotations @Override Exceptions NullPointerException: if the given annotation class is null Since 1.5

getAnnotation

back to summary

public <T extends Annotation> T getAnnotation(Class<T> annotationClass)

Overrides java.lang.reflect.Executable.getAnnotation.

Implements java.lang.reflect.AnnotatedElement.getAnnotation.

Doc from java.lang.reflect.Executable.getAnnotation.

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

Annotations

@Override

Exceptions

NullPointerException:: if the given annotation class is null

Since

1.5

getAnnotationBytes	back to summary
pack-priv byte[] getAnnotationBytes() Implements abstract java.lang.reflect.Executable.getAnnotationBytes. Doc from java.lang.reflect.Executable.getAnnotationBytes. Accessor method to allow code sharing Annotations @Override

getAnnotationBytes

back to summary

pack-priv byte[] getAnnotationBytes()

Implements abstract java.lang.reflect.Executable.getAnnotationBytes.

Doc from java.lang.reflect.Executable.getAnnotationBytes.

Accessor method to allow code sharing

Annotations

@Override

getConstructorAccessor	back to summary
pack-priv ConstructorAccessor getConstructorAccessor()

getDeclaredAnnotations	back to summary
public Annotation[] getDeclaredAnnotations() Overrides java.lang.reflect.Executable.getDeclaredAnnotations. Implements java.lang.reflect.AnnotatedElement.getDeclaredAnnotations. Doc from java.lang.reflect.Executable.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. Annotations @Override Since 1.5

getDeclaredAnnotations

back to summary

public Annotation[] getDeclaredAnnotations()

Overrides java.lang.reflect.Executable.getDeclaredAnnotations.

Implements java.lang.reflect.AnnotatedElement.getDeclaredAnnotations.

Doc from java.lang.reflect.Executable.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.

Annotations

@Override

Since

1.5

getDeclaringClass back to summary

getDeclaringClass	back to summary
public Class<T> getDeclaringClass() Implements abstract java.lang.reflect.Executable.getDeclaringClass. Implements java.lang.reflect.Member.getDeclaringClass. Returns the `Class` object representing the class that declares the constructor represented by this object. Annotations @Override

public Class<T> getDeclaringClass()

Implements abstract java.lang.reflect.Executable.getDeclaringClass.

Implements java.lang.reflect.Member.getDeclaringClass.

Returns the Class object representing the class that declares the constructor represented by this object.

Annotations

@Override

getExceptionTypes back to summary

getExceptionTypes	back to summary
public Class<?>[] getExceptionTypes() Implements abstract java.lang.reflect.Executable.getExceptionTypes. Doc from java.lang.reflect.Executable.getExceptionTypes. Returns an array of `Class` objects that represent the types of exceptions declared to be thrown by the underlying executable represented by this object. Returns an array of length 0 if the executable declares no exceptions in its `throws` clause. Annotations @Override

public Class<?>[] getExceptionTypes()

Implements abstract java.lang.reflect.Executable.getExceptionTypes.

Doc from java.lang.reflect.Executable.getExceptionTypes.

Returns an array of Class objects that represent the types of exceptions declared to be thrown by the underlying executable represented by this object. Returns an array of length 0 if the executable declares no exceptions in its throws clause.

Annotations

@Override

getFactory	back to summary
private GenericsFactory getFactory()

getGenericExceptionTypes back to summary

getGenericExceptionTypes	back to summary
public Type[] getGenericExceptionTypes() Overrides java.lang.reflect.Executable.getGenericExceptionTypes. Doc from java.lang.reflect.Executable.getGenericExceptionTypes. Returns an array of `Type` objects that represent the exceptions declared to be thrown by this executable object. Returns an array of length 0 if the underlying executable declares no exceptions in its `throws` clause. If an exception type is a type variable or a parameterized type, it is created. Otherwise, it is resolved. Annotations @Override Exceptions GenericSignatureFormatError: if the generic method signature does not conform to the format specified in The Java Virtual Machine Specification TypeNotPresentException: if the underlying executable's `throws` clause refers to a non-existent type declaration MalformedParameterizedTypeException: if the underlying executable's `throws` clause refers to a parameterized type that cannot be instantiated for any reason Since 1.5

public Type[] getGenericExceptionTypes()

Overrides java.lang.reflect.Executable.getGenericExceptionTypes.

Doc from java.lang.reflect.Executable.getGenericExceptionTypes.

Returns an array of Type objects that represent the exceptions declared to be thrown by this executable object. Returns an array of length 0 if the underlying executable declares no exceptions in its throws clause.

If an exception type is a type variable or a parameterized type, it is created. Otherwise, it is resolved.

Annotations

@Override

Exceptions

GenericSignatureFormatError:: if the generic method signature does not conform to the format specified in The Java Virtual Machine Specification
TypeNotPresentException:: if the underlying executable's throws clause refers to a non-existent type declaration
MalformedParameterizedTypeException:: if the underlying executable's throws clause refers to a parameterized type that cannot be instantiated for any reason

Since

1.5

getGenericInfo	back to summary
pack-priv ConstructorRepository getGenericInfo() Implements abstract java.lang.reflect.Executable.getGenericInfo. Annotations @Override

getGenericInfo

back to summary

pack-priv ConstructorRepository getGenericInfo()

Implements abstract java.lang.reflect.Executable.getGenericInfo.

Annotations

@Override

getGenericParameterTypes back to summary

getGenericParameterTypes	back to summary
public Type[] getGenericParameterTypes() Overrides java.lang.reflect.Executable.getGenericParameterTypes. Doc from java.lang.reflect.Executable.getGenericParameterTypes. Returns an array of `Type` objects that represent the formal parameter types, in declaration order, of the executable represented by this object. An array of length 0 is returned if the underlying executable takes no parameters. Note that the constructors of some inner classes may have an implicitly declared parameter in addition to explicitly declared ones. Compact constructors of a record class may also have implicitly declared parameters, but they are a special case and thus considered as if they had been explicitly declared in the source. Finally note that as a `modeling artifact`, the number of returned parameters can differ depending on whether or not generic information is present. If generic information is present, parameters explicitly present in the source or parameters of compact constructors of a record class will be returned. Note that parameters of compact constructors of a record class are a special case, as they are not explicitly present in the source, and its type will be returned regardless of the parameters being implicitly declared or not. If generic information is not present, implicit and synthetic parameters may be returned as well. If a formal parameter type is a parameterized type, the `Type` object returned for it must accurately reflect the actual type arguments used in the source code. This assertion also applies to the parameters of compact constructors of a record class, independently of them being implicitly declared or not. If a formal parameter type is a type variable or a parameterized type, it is created. Otherwise, it is resolved. Annotations @Override Exceptions GenericSignatureFormatError: if the generic method signature does not conform to the format specified in The Java Virtual Machine Specification TypeNotPresentException: if any of the parameter types of the underlying executable refers to a non-existent type declaration MalformedParameterizedTypeException: if any of the underlying executable's parameter types refer to a parameterized type that cannot be instantiated for any reason Since 1.5

public Type[] getGenericParameterTypes()

Overrides java.lang.reflect.Executable.getGenericParameterTypes.

Doc from java.lang.reflect.Executable.getGenericParameterTypes.

Returns an array of Type objects that represent the formal parameter types, in declaration order, of the executable represented by this object. An array of length 0 is returned if the underlying executable takes no parameters. Note that the constructors of some inner classes may have an implicitly declared parameter in addition to explicitly declared ones. Compact constructors of a record class may also have implicitly declared parameters, but they are a special case and thus considered as if they had been explicitly declared in the source. Finally note that as a modeling artifact, the number of returned parameters can differ depending on whether or not generic information is present. If generic information is present, parameters explicitly present in the source or parameters of compact constructors of a record class will be returned. Note that parameters of compact constructors of a record class are a special case, as they are not explicitly present in the source, and its type will be returned regardless of the parameters being implicitly declared or not. If generic information is not present, implicit and synthetic parameters may be returned as well.

If a formal parameter type is a parameterized type, the Type object returned for it must accurately reflect the actual type arguments used in the source code. This assertion also applies to the parameters of compact constructors of a record class, independently of them being implicitly declared or not.

If a formal parameter type is a type variable or a parameterized type, it is created. Otherwise, it is resolved.

Annotations

@Override

Exceptions

GenericSignatureFormatError:: if the generic method signature does not conform to the format specified in The Java Virtual Machine Specification
TypeNotPresentException:: if any of the parameter types of the underlying executable refers to a non-existent type declaration
MalformedParameterizedTypeException:: if any of the underlying executable's parameter types refer to a parameterized type that cannot be instantiated for any reason

Since

1.5

getModifiers	back to summary
public int getModifiers() Implements abstract java.lang.reflect.Executable.getModifiers. Implements java.lang.reflect.Member.getModifiers. Doc from java.lang.reflect.Executable.getModifiers. Returns the Java language modifiers for the executable represented by this object. Annotations @Override Java Language Specification 8.8.3 Constructor Modifiers

getModifiers

back to summary

public int getModifiers()

Implements abstract java.lang.reflect.Executable.getModifiers.

Implements java.lang.reflect.Member.getModifiers.

Doc from java.lang.reflect.Executable.getModifiers.

Returns the Java language modifiers for the executable represented by this object.

Annotations

@Override

Java Language Specification

8.8.3 Constructor Modifiers

getName	back to summary
public String getName() Implements abstract java.lang.reflect.Executable.getName. Implements java.lang.reflect.Member.getName. Returns the name of this constructor, as a string. This is the binary name of the constructor's declaring class. Annotations @Override

getName

back to summary

public String getName()

Implements abstract java.lang.reflect.Executable.getName.

Implements java.lang.reflect.Member.getName.

Returns the name of this constructor, as a string. This is the binary name of the constructor's declaring class.

Annotations

@Override

getParameterAnnotations back to summary

getParameterAnnotations	back to summary
public Annotation[][] getParameterAnnotations() Implements abstract java.lang.reflect.Executable.getParameterAnnotations. Doc from java.lang.reflect.Executable.getParameterAnnotations. Returns an array of arrays of `Annotation`s that represent the annotations on the formal parameters, in declaration order, of the `Executable` represented by this object. Synthetic and mandated parameters (see explanation below), such as the outer "this" parameter to an inner class constructor will be represented in the returned array. If the executable has no parameters (meaning no formal, no synthetic, and no mandated parameters), a zero-length array will be returned. If the `Executable` has one or more parameters, a nested array of length zero is returned for each parameter with no annotations. The annotation objects contained in the returned arrays are serializable. The caller of this method is free to modify the returned arrays; it will have no effect on the arrays returned to other callers. A compiler may add extra parameters that are implicitly declared in source ("mandated"), as well as parameters that are neither implicitly nor explicitly declared in source ("synthetic") to the parameter list for a method. See `java.lang.reflect.Parameter` for more information. Note that any annotations returned by this method are declaration annotations. Annotations @Override Since 1.5

public Annotation[][] getParameterAnnotations()

Implements abstract java.lang.reflect.Executable.getParameterAnnotations.

Doc from java.lang.reflect.Executable.getParameterAnnotations.

Returns an array of arrays of Annotations that represent the annotations on the formal parameters, in declaration order, of the Executable represented by this object. Synthetic and mandated parameters (see explanation below), such as the outer "this" parameter to an inner class constructor will be represented in the returned array. If the executable has no parameters (meaning no formal, no synthetic, and no mandated parameters), a zero-length array will be returned. If the Executable has one or more parameters, a nested array of length zero is returned for each parameter with no annotations. The annotation objects contained in the returned arrays are serializable. The caller of this method is free to modify the returned arrays; it will have no effect on the arrays returned to other callers. A compiler may add extra parameters that are implicitly declared in source ("mandated"), as well as parameters that are neither implicitly nor explicitly declared in source ("synthetic") to the parameter list for a method. See java.lang.reflect.Parameter for more information.

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

Annotations

@Override

Since

1.5

getParameterCount	back to summary
public int getParameterCount() Implements abstract java.lang.reflect.Executable.getParameterCount. Doc from java.lang.reflect.Executable.getParameterCount. Returns the number of formal parameters (whether explicitly declared or implicitly declared or neither) for the executable represented by this object. Since 1.8

getParameterCount

back to summary

public int getParameterCount()

Implements abstract java.lang.reflect.Executable.getParameterCount.

Doc from java.lang.reflect.Executable.getParameterCount.

Returns the number of formal parameters (whether explicitly declared or implicitly declared or neither) for the executable represented by this object.

Since: 1.8

getParameterTypes back to summary

getParameterTypes	back to summary
public Class<?>[] getParameterTypes() Implements abstract java.lang.reflect.Executable.getParameterTypes. Doc from java.lang.reflect.Executable.getParameterTypes. Returns an array of `Class` objects that represent the formal parameter types, in declaration order, of the executable represented by this object. Returns an array of length 0 if the underlying executable takes no parameters. Note that the constructors of some inner classes may have an implicitly declared parameter in addition to explicitly declared ones. Also note that compact constructors of a record class may have implicitly declared parameters. Annotations @Override

public Class<?>[] getParameterTypes()

Implements abstract java.lang.reflect.Executable.getParameterTypes.

Doc from java.lang.reflect.Executable.getParameterTypes.

Returns an array of Class objects that represent the formal parameter types, in declaration order, of the executable represented by this object. Returns an array of length 0 if the underlying executable takes no parameters. Note that the constructors of some inner classes may have an implicitly declared parameter in addition to explicitly declared ones. Also note that compact constructors of a record class may have implicitly declared parameters.

Annotations

@Override

getRawAnnotations	back to summary
pack-priv byte[] getRawAnnotations()

getRawParameterAnnotations	back to summary
pack-priv byte[] getRawParameterAnnotations()

getRoot	back to summary
pack-priv Constructor<T> getRoot() Overrides java.lang.reflect.AccessibleObject.getRoot. Doc from java.lang.reflect.AccessibleObject.getRoot. Returns the root AccessibleObject; or null if this object is the root. All subclasses override this method. Annotations @Override

getRoot

back to summary

pack-priv Constructor<T> getRoot()

Overrides java.lang.reflect.AccessibleObject.getRoot.

Doc from java.lang.reflect.AccessibleObject.getRoot.

Returns the root AccessibleObject; or null if this object is the root. All subclasses override this method.

Annotations

@Override

getSharedExceptionTypes	back to summary
pack-priv Class<?>[] getSharedExceptionTypes() Implements abstract java.lang.reflect.Executable.getSharedExceptionTypes. Annotations @Override

getSharedExceptionTypes

back to summary

pack-priv Class<?>[] getSharedExceptionTypes()

Implements abstract java.lang.reflect.Executable.getSharedExceptionTypes.

Annotations

@Override

getSharedParameterTypes	back to summary
pack-priv Class<?>[] getSharedParameterTypes() Implements abstract java.lang.reflect.Executable.getSharedParameterTypes. Annotations @Override

getSharedParameterTypes

back to summary

pack-priv Class<?>[] getSharedParameterTypes()

Implements abstract java.lang.reflect.Executable.getSharedParameterTypes.

Annotations

@Override

getSignature	back to summary
pack-priv String getSignature()

getSlot	back to summary
pack-priv int getSlot()

getTypeParameters back to summary

getTypeParameters	back to summary
public TypeVariable<Constructor<T>>[] getTypeParameters() Implements abstract java.lang.reflect.Executable.getTypeParameters. Implements java.lang.reflect.GenericDeclaration.getTypeParameters. Doc from java.lang.reflect.Executable.getTypeParameters. Returns an array of `TypeVariable` objects that represent the type variables declared by the generic declaration represented by this `GenericDeclaration` object, in declaration order. Returns an array of length 0 if the underlying generic declaration declares no type variables. Annotations @Override @SuppressWarnings:unchecked Exceptions GenericSignatureFormatError: if the generic signature of this generic declaration does not conform to the format specified in The Java Virtual Machine Specification Since 1.5

public TypeVariable<Constructor<T>>[] getTypeParameters()

Implements abstract java.lang.reflect.Executable.getTypeParameters.

Implements java.lang.reflect.GenericDeclaration.getTypeParameters.

Doc from java.lang.reflect.Executable.getTypeParameters.

Returns an array of TypeVariable objects that represent the type variables declared by the generic declaration represented by this GenericDeclaration object, in declaration order. Returns an array of length 0 if the underlying generic declaration declares no type variables.

Annotations

@Override
@SuppressWarnings:unchecked

Exceptions

GenericSignatureFormatError:: if the generic signature of this generic declaration does not conform to the format specified in The Java Virtual Machine Specification

Since

1.5

handleParameterNumberMismatch	back to summary
pack-priv boolean handleParameterNumberMismatch(int resultLength, Class<?>[] parameterTypes) Implements abstract java.lang.reflect.Executable.handleParameterNumberMismatch. Annotations @Override

handleParameterNumberMismatch

back to summary

pack-priv boolean handleParameterNumberMismatch(int resultLength, Class<?>[] parameterTypes)

Implements abstract java.lang.reflect.Executable.handleParameterNumberMismatch.

Annotations

@Override

hasGenericInformation	back to summary
pack-priv boolean hasGenericInformation() Implements abstract java.lang.reflect.Executable.hasGenericInformation. Doc from java.lang.reflect.Executable.hasGenericInformation. Does the Executable have generic information. Annotations @Override

hasGenericInformation

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pack-priv boolean hasGenericInformation()

Implements abstract java.lang.reflect.Executable.hasGenericInformation.

Doc from java.lang.reflect.Executable.hasGenericInformation.

Does the Executable have generic information.

Annotations

@Override

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Returns a hashcode for this `Constructor`. The hashcode is the same as the hashcode for the underlying constructor's declaring class name.

public int hashCode()

Overrides java.lang.Object.hashCode.

Returns a hashcode for this Constructor. The hashcode is the same as the hashcode for the underlying constructor's declaring class name.

isSynthetic back to summary

isSynthetic	back to summary
public boolean isSynthetic() Overrides java.lang.reflect.Executable.isSynthetic. Implements java.lang.reflect.Member.isSynthetic. Doc from java.lang.reflect.Executable.isSynthetic. Returns `true` if this executable is a synthetic construct; returns `false` otherwise. Annotations @Override Since 1.5 Java Language Specification 13.1 The Form of a Binary Java Virtual Machine Specification 4.6 Methods See Also Java programming language and JVM modeling in core reflection

public boolean isSynthetic()

Overrides java.lang.reflect.Executable.isSynthetic.

Implements java.lang.reflect.Member.isSynthetic.

Doc from java.lang.reflect.Executable.isSynthetic.

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

Annotations

@Override

Since

1.5

Java Language Specification

13.1 The Form of a Binary

Java Virtual Machine Specification

4.6 Methods

isVarArgs back to summary

isVarArgs	back to summary
public boolean isVarArgs() Overrides java.lang.reflect.Executable.isVarArgs. Doc from java.lang.reflect.Executable.isVarArgs. Returns `true` if this executable was declared to take a variable number of arguments; returns `false` otherwise. Annotations @Override Since 1.5 Java Language Specification 8.4.1 Formal Parameters

public boolean isVarArgs()

Overrides java.lang.reflect.Executable.isVarArgs.

Doc from java.lang.reflect.Executable.isVarArgs.

Returns true if this executable was declared to take a variable number of arguments; returns false otherwise.

Annotations

@Override

Since

1.5

Java Language Specification

8.4.1 Formal Parameters

newInstance back to summary

public T newInstance(Object... initargs) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException

Uses the constructor represented by this Constructor object to create and initialize a new instance of the constructor's declaring class, with the specified initialization parameters. Individual parameters are automatically unwrapped to match primitive formal parameters, and both primitive and reference parameters are subject to method invocation conversions as necessary.

If the number of formal parameters required by the underlying constructor is 0, the supplied initargs array may be of length 0 or null.

If the constructor's declaring class is an inner class in a non-static context, the first argument to the constructor needs to be the enclosing instance; see section 15.9.3 of The Java Language Specification.

If the required access and argument checks succeed and the instantiation will proceed, the constructor's declaring class is initialized if it has not already been initialized.

If the constructor completes normally, returns the newly created and initialized instance.

Parameters

initargs:Object[]: array of objects to be passed as arguments to the constructor call; values of primitive types are wrapped in a wrapper object of the appropriate type (e.g. a float in a Float)

Returns:T

a new object created by calling the constructor this object represents

Annotations

@CallerSensitive
@ForceInline

Exceptions

InstantiationException:: if the class that declares the underlying constructor represents an abstract class.
IllegalAccessException:: if this Constructor object is enforcing Java language access control and the underlying constructor is inaccessible.
IllegalArgumentException:: if the number of actual and formal parameters differ; if an unwrapping conversion for primitive arguments fails; or if, after possible unwrapping, a parameter value cannot be converted to the corresponding formal parameter type by a method invocation conversion; if this constructor pertains to an enum class.
InvocationTargetException:: if the underlying constructor throws an exception.
ExceptionInInitializerError:: if the initialization provoked by this method fails.

newInstanceWithCaller	back to summary
pack-priv T newInstanceWithCaller(Object[] args, boolean checkAccess, Class<?> caller) throws InstantiationException, IllegalAccessException, InvocationTargetException

newWithAccessor	back to summary
pack-priv Constructor<T> newWithAccessor(ConstructorAccessor accessor)

setAccessible back to summary

public void setAccessible(boolean flag)

Overrides java.lang.reflect.AccessibleObject.setAccessible.

Doc from java.lang.reflect.AccessibleObject.setAccessible.

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 of declaring class 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 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 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 may be used by JNI code with no caller class on the stack to enable access to a member of declaring class D if and only if:

The member is public and D is public in a package that the module containing D exports unconditionally.

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.

A SecurityException is thrown if this object is a Constructor object for the class Class and flag is true.

Annotations

@Override
@CallerSensitive

Exceptions

InaccessibleObjectException:: if access cannot be enabled
SecurityException:: if this is a constructor for java.lang.Class

setConstructorAccessor	back to summary
pack-priv void setConstructorAccessor(ConstructorAccessor accessor)

specificToGenericStringHeader

back to summary

pack-priv void specificToGenericStringHeader(StringBuilder sb)

Implements abstract java.lang.reflect.Executable.specificToGenericStringHeader.

Doc from java.lang.reflect.Executable.specificToGenericStringHeader.

Generate toGenericString header information specific to a method or constructor.

Annotations

@Override

specificToStringHeader

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pack-priv void specificToStringHeader(StringBuilder sb)

Implements abstract java.lang.reflect.Executable.specificToStringHeader.

Doc from java.lang.reflect.Executable.specificToStringHeader.

Generate toString header information specific to a method or constructor.

Annotations

@Override

toGenericString back to summary

public String toGenericString()

Overrides java.lang.reflect.Executable.toGenericString.

Returns a string describing this Constructor, including type parameters. The string is formatted as the constructor access modifiers, if any, followed by an angle-bracketed comma separated list of the constructor's type parameters, if any, including informative bounds of the type parameters, if any, followed by the fully-qualified name of the declaring class, followed by a parenthesized, comma-separated list of the constructor's generic formal parameter types. If this constructor was declared to take a variable number of arguments, instead of denoting the last parameter as "Type[]", it is denoted as "Type...". A space is used to separate access modifiers from one another and from the type parameters or class name. If there are no type parameters, the type parameter list is elided; if the type parameter list is present, a space separates the list from the class name. If the constructor is declared to throw exceptions, the parameter list is followed by a space, followed by the word "throws" followed by a comma-separated list of the generic thrown exception types.

The only possible modifiers for constructors are the access modifiers public, protected or private. Only one of these may appear, or none if the constructor has default (package) access.

Returns:String

a string describing this Constructor, include type parameters

Annotations

@Override

Since

1.5

Java Language Specification

8.8.3 Constructor Modifiers, 8.9.2 Enum Body Declarations

toShortString

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pack-priv String toShortString()

Overrides java.lang.reflect.AccessibleObject.toShortString.

Doc from java.lang.reflect.AccessibleObject.toShortString.

Returns a short descriptive string to describe this object in log messages.

Annotations

@Override

toString back to summary

public String toString()

Overrides java.lang.Object.toString.

Returns a string describing this Constructor. The string is formatted as the constructor access modifiers, if any, followed by the fully-qualified name of the declaring class, followed by a parenthesized, comma-separated list of the constructor's formal parameter types. For example:

public java.util.HashMap(int,float)

If the constructor is declared to throw exceptions, the parameter list is followed by a space, followed by the word "throws" followed by a comma-separated list of the thrown exception types.

The only possible modifiers for constructors are the access modifiers public, protected or private. Only one of these may appear, or none if the constructor has default (package) access.

Returns:String: a string describing this Constructor
Java Language Specification: 8.8.3 Constructor Modifiers, 8.9.2 Enum Body Declarations

public final Class Constructor<T>

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