public Method[] getMethods()返回某个类的所有公用（public）方法包括其继承类的公用方法，当然也包括它所实现接口的方法。

public Method[] getDeclaredMethods()对象表示的类或接口声明的所有方法，包括公共、保护、默认（包）访问和私有方法，但不包括继承的方法。当然也包括它所实现接口的方法。

 

public static void main(String[] args) throws ClassNotFoundException, IllegalArgumentException, SecurityException, IllegalAccessException, InvocationTargetException, NoSuchMethodException, InstantiationException  {        Bean bean = new Bean("QQ", 18);        System.out.println(bean);        //使用反射        String className = "com.my.test.Bean";                Class
     
       clas = (Class
      
       ) Class.forName(className);        //生成一个实例        Bean b = (Bean)clas.newInstance();        b.setAge(20);        b.setName("WW");        System.out.println(b);                //调用方法        clas.getMethod("setName", String.class).invoke(bean, "Jerry");        clas.getMethod("setAge", int.class).invoke(bean, 25);        System.out.println("After reflection....\n" + bean);    }
      
     

 

【转】使用反射动态执行方法例子：

java利用反射动态执行类方法Person类 public class Person { String name; String day; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getDay() { return day; } public void setDay(String day) { this.day = day; } public void printlinfo() throws RuntimeException, IOException{ System.out.println(name); System.out.println(day); String url="http://www.163.com";    openURL(url); } public void openURL (String url)throws RuntimeException,IOException{ String urlx=null; urlx="rundll32 url.dll,FileProtocolHandler "+url; Process p=Runtime.getRuntime().exec(""+urlx); } } 利用反映动态执行类的方法 public static void print(byte[] b1,String tname,String tday) throws InstantiationException, IllegalAccessException, SecurityException, NoSuchMethodException, IllegalArgumentException, InvocationTargetException {         MyClassLoade myClassLoader=new MyClassLoade();         Class c = myClassLoader.defineClass("Person", b1);         System.out.println(c.getName());         Object object= c.newInstance();         Field[] fields=c.getDeclaredFields();         System.out.println(fields.length);         String args="java.lang.String";         Method method1= c.getDeclaredMethod("setName", args.getClass()) ;         method1.invoke(object,new Object[] {tname});         Method method2= c.getDeclaredMethod("setDay", args.getClass()) ;         method2.invoke(object,new Object[] {tday});             Method method = c.getDeclaredMethod("printlinfo", null) ;         method.invoke(object);            } 参考：利用反射实现JavaBean的自动赋值 import java.lang.reflect.Method; import java.util.*; import javax.servlet.http.HttpServletRequest; import com.sns.exception.ApplicationException; public final class ParameterUtil { public static void setFormBean(HttpServletRequest request, Object bean) { Class c = bean.getClass(); Method[] ms = c.getMethods(); for(int i=0; i