Java ?????????

• ??????ClassLoader?ClassLoader cl = this.getClass().getClassLoader();
• ??????Class clazz = cl.loadClass("?????");

??newInstance()???????

• ??????????????
• ??????????????

??Constructor???????????

• Constructor con = clazz.getConstructor(String.class, Integer.class);

?????

• Person p2 = con.newInstance("Peter", 20);

??????????

• public Class[] getInterfaces();

??????????

• ?????Method method = clazz.getMethod("getName", Integer.class);
• ?????Object invoke = method.invoke(p2, 20);

???????

• ?????method.setAccessible(true);

????????

• ??Field?Field field = clazz.getDeclaredField("age");
• ????field.set(p2, 20);