Java的反射机制---动态调用对象的简单方法

package com.beidou.test;
import java.lang.reflect.Method;

public class Dynamic {
  public static void main(String[] args) throws Exception{
  Class c = Dynamic.class;//得到对象
  Method[] methods = c.getDeclaredMethods();//得到方法

  for(Method method : methods){
   System.out.print(method.getName());//打印参数名
   Class[] parameterTypes = method.getParameterTypes();
   for(int i=0;i<parameterTypes.length;i++){
     String nameString=parameterTypes[i].getName();
     System.out.print("parameterType:"+nameString);//打印方法参数类型
   }
   
   System.out.print("ReturnType:"+method.getReturnType());
     System.out.println();
   }

   Object obj=c.newInstance();//获取到方法对象,假设方法的参数是一个int,String,method名为getAge
   Method sAge = c.getMethod("getAge", new Class[] {int.class,String.class});
   //获得参数Object
    Object[] arguments = new Object[]{new Integer(23),new String("abc")};
   //执行方法
   String s=(String)sAge.invoke(obj , arguments);
   System.out.print(s);
   }

   public String getAge(int age,String name){
      return name+": "+age;
   }
}