public class ReflexTest {     public static void main(String[] args)      throws ClassNotFoundException, NoSuchMethodException, SecurityException,      IllegalAccessException, IllegalArgumentException, InvocationTargetException,      InstantiationException {      //参数类型      Class[] paramTypes = new Class[3];      paramTypes[0] = String.class;      paramTypes[1] = Integer.class;      paramTypes[2] = String.class;      //取得方法      Method m = Demo.class.getDeclaredMethod("getSome", paramTypes);      //参数设置      Object[] os = new Object[3];      os[0] = "pp";      os[1] = 4;      os[2] = "3";      //方法调用      m.invoke(Demo.class.newInstance(), os);  } } class Demo{  public void getSome(String name,Integer year, String age){   System.out.println("name is :" + name + ";age is :" + age + ";i is :" + year);  } }