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/**

* @program JavaBooks

* @description: MethodDemo

* @author: mf

* @create: 2020/02/09 23:45

*/

package com.reflect;

import java.lang.reflect.Method;

public class MethodDemo {

public static void main(String[] args) throws Exception {

// 1. 获取对象

Class clazz = Class.forName("com.reflect.Student");

// 2. 获取所有公有方法

System.out.println("***************获取所有的”公有“方法*******************");

Method[] methods = clazz.getMethods();

for (Method method : methods) {

System.out.println(method);

}

System.out.println("***************获取所有的方法，包括私有的*******************");

Method[] declaredMethods = clazz.getDeclaredMethods();

for (Method declaredMethod : declaredMethods) {

System.out.println(declaredMethod);

}

System.out.println("***************获取公有的show1()方法*******************");

Method m = clazz.getMethod("show1", String.class);

System.out.println(m);

// 实例化对象

Object o = clazz.getConstructor().newInstance();

m.invoke(o, "买");

System.out.println("***************获取私有的show4()方法******************");

m = clazz.getDeclaredMethod("show4", int.class);

System.out.println(m);

m.setAccessible(true); // 暴力解除 私有

Object result = m.invoke(o, 20);//需要两个参数，一个是要调用的对象（获取有反射），一个是实参

System.out.println("返回值：" + result);

}

}