Java_反射应用_通过Java反射调用方法

import java.lang.reflect.Method; import java.lang.reflect.InvocationTargetException; /** * Created by IntelliJ IDEA. * File: TestRef.java * User: leizhimin * Date: 2008-1-28 14:48:44 */ 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"); } }