方法的反射类

package com.hh.cn;

import java.io.InputStream;

import java.util.List;

public class Person {

public String name = "aaaa";

public Person()

{System.out.println("Person");}

public Person(String name)

{System.out.println(name);}

public Person(String name,int password)

{System.out.println( name +":"+password);}

private Person(List list)

{System.out.println("list");}

public void aa1(){

System.out.println("aa1");

}

public void aa1(String name,int password ){

System.out.println(name+":"+password);

}

private void aa1(InputStream in){

System.out.println(in);

}

public static void aa1(int num){

System.out.println(num);

}

public static void main(String[]args){

System.out.println("main!!");

}

}//Person.java

---------------------------------------------------------------------------------------------

package com.hh.cn;

import java.io.FileInputStream;

import java.io.InputStream;

import java.lang.reflect.Method;

import javax.imageio.stream.FileImageInputStream;

import org.junit.Test;

//反射类的方法

public class Demo3 {

//反射类的方法：public void aa1()

@Test

public void test1() throwsException{

Person p = new Person();

Class clazz =Class.forName("com.hh.cn.Person");

Method method = clazz.getMethod("aa1",null);

method.invoke(p, null);

}

//反射类的方法：public void aa1(String name,intpassword)

@Test

public void test2() throwsException{

Person p = new Person();

Class clazz =Class.forName("com.hh.cn.Person");

Method method = clazz.getMethod("aa1",String.class,int.class);

method.invoke(p, "zxx",38);

}

//反射类的方法：public void aa1(InputStreamin)

@Test

public void test4() throwsException{

Person p = new Person();

Class clazz =Class.forName("com.hh.cn.Person");

Method method =clazz.getDeclaredMethod("aa1", InputStream.class);

method.setAccessible(true);//暴力访问

method.invoke(p,newFileInputStream("c:\\1.txt"));

}

//反射类的方法：public static void aa1(intnum)

@Test

public void test5() throwsException{

Class clazz =Class.forName("com.hh.cn.Person");

Method method = clazz.getMethod("aa1",int.class);

method.invoke(null,23);//静态调用时不需要对象p

}

//反射类的方法：public static voidmain(String[] args[])

@Test

public void test6() throwsException{

Class clazz =Class.forName("com.hh.cn.Person");

Method method = clazz.getMethod("main",String[].class);

method.invoke(null,new Object[]{newString[]{"aa","bb"}});//一种方法

//method.invoke(null, (Object)newString[]{"aa","bb"});//另一种方法

//jdk1.5 Method.invoke(StringmethodName,Object...args);

//jdk1.4 Method.invoke(String methodName,Objectobj[]);

}

}//Demo3.java