Javareflect 简明教程
java.lang.reflect - Method Class
Introduction
java.lang.reflect.Method 类提供有关类或接口上单个方法的信息并可访问该方法。反射方法可以是类方法或实例方法（包括抽象方法）。java.lang.reflect.Method 允许在将实际参数与基础方法的形式参数匹配时进行扩展转换，但如果发生缩小转换，则它会引发 IllegalArgumentException。
The java.lang.reflect.Method class provides information about, and access to, a single method on a class or interface. The reflected method may be a class method or an instance method (including an abstract method). A Method permits widening conversions to occur when matching the actual parameters to invoke with the underlying method’s formal parameters, but it throws an IllegalArgumentException if a narrowing conversion would occur.
Class declaration
以下是对 java.lang.reflect.Method 类的声明：
Following is the declaration for java.lang.reflect.Method class −
public final class Method<T>
extends AccessibleObject
implements GenericDeclaration, MemberClass methods
Sr.No. |
Method & Description |
1 |
boolean equals(Object obj)Compares this Method 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 method represented by this Method object. |
5 |
Object getDefaultValue()Returns the default value for the annotation member represented by this Method instance. |
6 |
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. |
7 |
Type[] getGenericExceptionTypes()Returns an array of Type objects that represent the exceptions declared to be thrown by this Constructor object. |
8 |
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. |
9 |
Type getGenericReturnType()Returns a Type object that represents the formal return type of the method represented by this Method object. |
10 |
int getModifiers()Returns the Java language modifiers for the method represented by this Method object, as an integer. |
11 |
String getName()Returns the name of this method, as a string. |
12 |
Annotation[][] getParameterAnnotations()Returns an array of arrays that represent the annotations on the formal parameters, in declaration order, of the method represented by this Method object. |
13 |
Class<?>[] getParameterTypes()Returns an array of Class objects that represent the formal parameter types, in declaration order, of the constructor represented by this Method object. |
14 |
Class<?> getReturnType()Returns a Class object that represents the formal return type of the method represented by this Method object. |
15 |
int hashCode()Returns a hashcode for this Constructor. |
16 |
Object invoke(Object obj, Object… args)Invokes the underlying method represented by this Method object, on the specified object with the specified parameters. |
17 |
boolean isBridge()Returns true if this method is a bridge method; returns false otherwise. |
18 |
boolean isSynthetic()Returns true if this method is a synthetic method; returns false otherwise. |
19 |
boolean isVarArgs()Returns true if this method was declared to take a variable number of arguments; returns false otherwise. |
20 |
String toGenericString()Returns a string describing this Method, including type parameters. |
21 |
String toString()Returns a string describing this Method. |