java.lang.reflect - Constructor<T> Class

Introduction

The java.lang.reflect.Constructor class provides information about, and access to, a single constructor for a class. Constructor permits widening conversions to occur when matching the actual parameters to newInstance() with the underlying constructor's formal parameters, but throws an IllegalArgumentException if a narrowing conversion would occur.

Class declaration

Following is the declaration for java.lang.reflect.Constructor class −

public final class Constructor<T>
   extends AccessibleObject
      implements GenericDeclaration, Member

Class methods

Sr.No.	Method & Description
1	boolean equals(Object obj) Compares this Constructor against the specified object.
2	<T extends Annotation> T getAnnotation(Class<T> annotationClass) Returns this element's annotation for the specified type if such an annotation is present, else null.
3	Annotation[] getDeclaredAnnotations() Returns all annotations that are directly present on this element.
4	Class<T> getDeclaringClass() Returns the Class object representing the class that declares the constructor represented by this Constructor object.
5	Class<?>[] getExceptionTypes() Returns an array of Class objects that represent the types of exceptions declared to be thrown by the underlying constructor represented by this Constructor object.
6	Type[] getGenericExceptionTypes() Returns an array of Type objects that represent the exceptions declared to be thrown by this Constructor object.
7	Type[] getGenericParameterTypes() Returns an array of Type objects that represent the formal parameter types, in declaration order, of the method represented by this Constructor object.
8	int getModifiers() Returns the Java language modifiers for the constructor represented by this Constructor object, as an integer.
9	String getName() Returns the name of this constructor, as a string.
10	Annotation[][] getParameterAnnotations() Returns an array of arrays that represent the annotations on the formal parameters, in declaration order, of the method represented by this Constructor object.
11	Class<?>[] getParameterTypes() Returns an array of Class objects that represent the formal parameter types, in declaration order, of the constructor represented by this Constructor object.
12	int hashCode() Returns a hashcode for this Constructor.
13	boolean isSynthetic() Returns true if this constructor is a synthetic constructor; returns false otherwise.
14	boolean isVarArgs() Returns true if this constructor was declared to take a variable number of arguments; returns false otherwise.
15	T newInstance(Object... 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.
16	String toGenericString() Returns a string describing this Constructor, including type parameters.
17	String toString() Returns a string describing this Constructor.

Methods inherited

This class inherits methods from the following classes −

java.lang.reflect.AccessibleObject
java.lang.Object