@Test
public void test2()
throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
People p = new People("Hana", 25, 170);
Class<? extends People> clazz = p.getClass();
Method m = clazz.getDeclaredMethod("print");
m.invoke(p);
}
@Test
public void test1() throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException {
People p = new People("Hana", 28, 190);
System.out.println("변경 전 : " + p.getName());
Class clazz = p.getClass();
// Field[] fields = clazz.getDeclaredFields();
Field f1 = clazz.getDeclaredField("name");
f1.setAccessible(true);
f1.set(p, "Lee");
System.out.println("변경 후:" + p.getName());
}