反射（一）

package com.ygl.reflect;



 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;



 public class InvokeTest {




public int add(int param1,int parma2){

return param1+parma2;

}


public String echo(String msg){

return msg;


}


public static void main(String[] args) throws IllegalArgumentException, InvocationTargetException {

Class<?>  clazz=InvokeTest.class;//或Class<?>  clazz=Class.forName("com.ygl.reflect.InvokeTest");

try {

Object invokeTest=clazz.newInstance();


try {

//参数所对应的class对象组成的数组，区分重载方法

Method addMethod=clazz.getMethod("add", new Class[]{int.class,int.class});

  //相应方法对象-->调用具体实例（invokeTest）

Object result=addMethod.invoke(invokeTest, new Object[]{1,2});

   System.out.println(result);

} catch (SecurityException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (NoSuchMethodException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}



} catch (InstantiationException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IllegalAccessException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

 }