Java 反射获取方法

package cn.itcast_03;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;

public class Hour09_Reflect {

    public static void main(String[] args) throws Exception{
        // TODO Auto-generated method stub
        //获取字节码文件对象
        Class c = Class.forName("cn.itcast_01.Person");
        //获取自己以及父亲所有的公共方法
         //Method[] methods = c.getMethods();
         //获取自己的所有方法
//         Method[] methods = c.getDeclaredMethods();
//         for(Method method : methods) {
//             System.out.println(method);
//         }
        /*
         * Person p = new Person();
         * p.show();
         */
        //创建对象
        Constructor con = c.getConstructor();
        Object obj = con.newInstance();
        //获取单个方法
        Method m1 = c.getMethod("show");
        m1.invoke(obj);
        System.out.println("-------");
        
        Method m2 = c.getMethod("method", String.class);
        m2.invoke(obj, "hello");
        
        Method m3 = c.getMethod("getString", String.class,int.class);
        Object objString = m3.invoke(obj, "hello",100);
        System.out.println(objString);
//        String s = (String)m3.invoke(obj, "hello",100);
//        System.out.println(s);
        
        //获取私有
        Method m4 = c.getDeclaredMethod("function");
        m4.setAccessible(true);
        m4.invoke(obj);
    }

}