Java反射调用方法

import java.lang.reflect.Method;import java.lang.reflect.InvocationTargetException;/*** File: TestRef.java* User: Ray* Date: 2011-6-30 13:00:00*/public class TestRef { public static void main(String args[]) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException { Foo foo = new Foo("这个一个Foo对象！"); Class clazz = foo.getClass(); Method m1 = clazz.getDeclaredMethod("outInfo"); Method m2 = clazz.getDeclaredMethod("setMsg", String.class); Method m3 = clazz.getDeclaredMethod("getMsg"); m1.invoke(foo); m2.invoke(foo, "重新设置msg信息！"); String msg = (String) m3.invoke(foo); System.out.println(msg); }}class Foo { private String msg; public Foo(String msg) { this.msg = msg; } public void setMsg(String msg) { this.msg = msg; } public String getMsg() { return msg; } public void outInfo() { System.out.println("这是测试Java反射的测试类"); }}

控制台输出结果：

这是测试Java反射的测试类
重新设置msg信息！